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1. 2 Keeping the subwoofer s as close as possible to the mid and high loudspeaker s will decrease phase irregularities and time smear If the subwoofer s is placed too far A thorough understanding of how low frequency waves transmit in acoustical environments is very helpful when designing installing and optimizing sound systems We recommend reading Fundamentals of Sound and Psychoacoustics by F Alton Everest in the Handbook for Sound Engineers published by Howard Sams amp Co Community VERIS Series Operation and Installation Manual Page 29 away from the mid high loudspeaker s the listener will experience a disjointed character to the program material causing the musicality of the system to suffer 3 Although the subwoofer is not highly directional still its acoustical output follows the inverse square law That is every time the distance from the subwoofer to the listener is doubled the output level will decrease by 6dB When covering a large space with multiple subwoofers it may be of benefit to space them some distance apart from one another to even out the levels throughout the space Typically this would only be done if the mid high loudspeakers are also spaced apart from one another such as in a distributed system in a sports venue Although this will help maintain an even level throughout the listening space there may be some areas that lie between two or more subwoofers that experience a certain amount of p
2. VERI S Series VERsatile Installation Systems Exquisite Performance Exceptional Value Operation Manual EC STATEMENT OF CONFORMITY This document confirms that the range of products of Community Professional Loudspeakers bearing the CE label meet all of the requirements in the EMC directive 89 336 EEC laid down by the Member States Council for adjustment of legal requirements Furthermore the products comply with the rules and regulations referring to the electromagnetic compatibility of devices from 30 August 1995 The Community Professional Loudspeaker products bearing the CE label comply with the following harmonized or national standards DI N EN 55013 08 1991 DI N EN 55020 05 1995 DI N EN 55082 1 03 1993 The authorized declaration and compatibility certification resides with the manufacturer and can be viewed upon request The responsible manufacturer is the company Community Light amp Sound 333 East 5 Street Chester PA 19013 USA TEL 1 610 876 3400 FAX 1 610 874 0190 Chester PA USA February 2007 Community VERIS Series Operation and Installation Manual Page 2 WELCOME TO COMMUNI TY A TRADITI ON OF EXCELLENCE AND INNOVATI ON Since the founding of our company in 1968 Community has been a constant developer and innovator of loudspeaker technology Many of our engineering achievements were undertaken to solve problems when no prior solutions existed Others resulted from simply seeing a better w
3. high fidelity weather resistant loudspeaker R2 Series In line with our history of excellence and innovation each Community product is manufactured in accordance with a complicated and exacting chain of procedures that ensure absolute quality With our unique designs our sophisticated techniques and our proprietary materials and transducers we are committed to bringing only the finest audio products to the many thousands of professional sound engineers performers and end users who rely on them daily Community Professional Loudspeakers 333 East Fifth Street Chester PA 19013 USA TEL 1 610 876 3400 FAX 1 610 874 0190 2007 All Rights Reserved Community VERIS Series Operation and Installation Manual Page 3 TABLE OF CONTENTS TABLE OF FIGURES e ETT 4 IMPORTANT SAFETY INFORMATION 32256 eD ndo Leder Ee aera otal OS E D Pes E 5 CS TIPS aaa uote Lom ends vint Pep M LC N vided Weta PLE A a LL tM Lea 5 PRECAUTIONS SCSAFETY CONSIDERATIONS irine a E NEA 6 VERI S SERI ES OPERATI ON MANUAL sssssssnsnnnnnnnnnnnnnnnnnnnnnnnnnna J INTRODUCTION S diei doa Vogvdod due P sauad ard acon Eoo eR addu duisina Eod DLE EP mubuvdfrs PRISE NE 7 VERIS TECHNOLOGY snuctenesoiverntanceteataebwengelateceres ant RTea Ve Pw E Tend bere qa ras xPPEUd S RUPEE 7 UNPACKING AND INSPECTION essent duro ta df Fs tena nel ce Sato taneuil Mad a E ET 8 VERIS SPECIFICATIONS VERIS 6 8 2067 287 L2 eater sexe vt pte en tre cet Pe kc C s 9 VERIS SPECI
4. sometimes greatly and also in how they behave when they clip see section on Amplifier Clipping on page 25 for more information on driver damage caused by clipping Because of this we can offer only general guidelines on how to set up your system Following is a brief discussion on using limiters to protect loudspeaker systems e The limiter should be set so that it provides some measure of gain reduction before the amplifier s begin to clip If the limiter is set so that it allows the amplifier s to go into hard clipping it will do little to protect the drivers except perhaps in the event of extended microphone feedback e If the system is large enough to handle the intended musical style in the size of room that it s designed to cover i e if there are enough amplifiers and loudspeakers to provide the desired SPL Sound Pressure Level before the amplifiers reach clipping then it will be possible to adjust the protective limiter so that the amplifiers never can go into clipping even under abusive conditions This will provide an excellent level of protection without sacrificing headroom and sound quality Conversely if the system is inadequately sized for the room or just barely powerful enough setting the limiter so that the amplifier s never goes into clipping is probably unrealistic Such a setting will most likely result in less sound pressure level than desired as well as a highly compressed sonic quality In such case you
5. 12 drivers Either model will add greatly increased power and extended low frequency response to the VERIS full range loudspeaker s that it s used with The smaller of the two the 210S is characterized by a tight punchy sound while the larger 212S adds a deeper low end but still with a very rapid transient response When using multiple subwoofers such as two or three on each side of a stage it s best to keep the enclosures stacked or positioned tightly together for maximum mutual coupling If an external electronic crossover is employed the use of a subwoofer will free up the low frequency power demand on the full range loudspeaker s thereby increasing output capability in the upper bass range An electronic crossover will also reduce intermodulation distortion in the amplifiers resulting in much improved sonic performance Note The guidelines referred to above are rules of thumb only Performance will vary based on room acoustics room geometry particularly ceiling height the location of the loudspeaker s the size and type of the amplifiers and the stylistic demands of the music and speech that are to be reproduced POSI TI ONI NG SUBWOOFERS Subwoofers are far less directional than the mid range and high frequency loudspeakers they are designed to augment This is because low frequency wavelengths are significantly longer than mid range and high frequency wavelengths A 30 Hz wave is approximately 35 feet in length and a 1
6. No STKIT A Seat Track Kit is available that fits all models of VERIS full range loudspeakers The STKIT provides a safe and convenient means of suspending a single enclosure By purchasing multiple kits one enclosure may be safely suspended over another Ceiling Mount Kit Model No CMKI T The Ceiling Mount Kit creates a hang point from a ceiling surface The CMKIT consists of a ceiling mount bracket and a bolt that fastens to a U yoke bracket or to one of several optional loudspeaker brackets It can be used with all full range VERIS loudspeakers Note The yoke is sold separately for VERIS 12 15 32 35 The yoke is included with VERIS 6 26 8 28 Community VERIS Series Operation and Installation Manual Page 42 Vertical Flying Kit Model No VFKIT The VFKIT for VERIS 12 15 32 35 full range loudspeakers allows two same size enclosures to be flown at 45 and 60 degree splay angles To vertically array 3 same size enclosures use 2 VFKIT s To vertically array 4 same size enclosures use 3 VFKIT s Yoke Brackets Model Nos VB Y12 VB Y15 VB Y32 VB Y35 Optional yoke brackets for the larger full range models VERIS 12 15 32 35 allow for direct horizontal mounting of the loudspeaker to a wall or ceiling This unique yoke bracket also permits vertical mounting with a selection of 09 109 or 209 of either upward or downward inclination Versatilt Bracket Model No VB VST The VB VST allows for precise installation of a
7. advantage of the Haas Effect can be as little as two to three milliseconds The exact value should take into account the overall distance between the two sources Greater distances require slightly longer additional delay times in order to compensate for variances in the velocity of sound as the temperature in the environment changes Why not equalize by listening After all the end product is sound That s true but you re probably not going to listen to swept sine waves you re more likely to be listening to music Even if you ve trained your hearing to a very fine degree and you possess perfect pitch you can easily miss room resonant modes if the music you re listening to is in one musical key and the room resonance happens to lie outside of that key While some rooms exhibit broad resonant peaks that are readily detectable by listening others have quite narrow ones that can be easily missed Typically the bandwidth of room resonance is often close to one third octave hence the development of the third octave equalizer Unfortunately most rooms aren t cooperative enough to exhibit resonance that falls precisely on ISO frequency centers which makes the third octave equalizer an imprecise correction tool Even if a room resonant mode does fall on an ISO frequency center its resonant frequency will shift upwards when the room fills with patrons and the volume of air is reduced by the displacement of solid bodies An FFT type analyzer will
8. and use and most importantly they provide excellent sound quality This Operation Manual is intended to help you install VERIS loudspeakers effectively and safely It provides useful information to assist in obtaining the best performance sound quality and reliability from your VERIS products We ve provided several easy to understand diagrams to enable you to quickly grasp the main features of VERIS loudspeakers however we recommend that you take the time to read the entire manual to insure that your VERIS powered installations meet the highest possible quality and safety standards VERIS TECHNOLOGY VERIS loudspeakers offer numerous advances in technology that provide superb sound and long term reliability Some of these include e Sophisticated internal crossover networks for reduced off axis lobing and consistent coverage throughout the crossover region e Carbon Ring Cone Technology Used on all full range low frequency drivers this technology reduces distortion improves transient response and provides as much as 30 greater cone area than that of conventional cone drivers patent pending e Ferrofluid cooled high frequency and mid frequency drivers for improved heat transfer and dramatically reduced distortion through viscous damping of driver resonant modes e Powerful 1 inch throat high frequency compression drivers offer extended high end response smooth output and lower distortion than larger format drivers e Non
9. can either upgrade the sound system by adding loudspeakers and amplifiers or you can make some intelligent compromises By carefully adjusting the attack time release time and threshold level you can allow some of the peaks to get through to the amplifiers while still reducing the potential for damage from long term abuse A fast attack time under 10 ms will limit most of the peaks in normal program material By lengthening the attack time you can allow short transients to pass through like a snare drum while still reducing longer peaks like vocal and instrumental crescendos This will improve the dynamic range while still providing a measure of protection Similarly a long release time will tend to squash the program material as well as introduce an audible ramp up in level as the limiter slowly recovers By shortening the release time you can increase the short term dynamic range As long as the threshold is not set too high the limiter can still aid in protecting the drivers from long term overdrive but not as thoroughly as it would in an adequately sized system Be cautious of very short attack and release times as the detector circuits may start to track the individual cycles of a sustained low frequency tone creating a pumping effect almost like that of a tremolo circuit on a guitar amplifier It will take some experimentation to derive the best settings for each situation Maximum power and voltage ratings are state
10. dB 92 dB 93 dB VERIS 1264 99 dB free space SPL VERIS 1296 97 dB 125 Hz 10 kHz 1 3 octave bands Maximum SPL 110 dB cont 113 dB cont 115 dB cont 118 dB cont VERIS 1264 e Continuous 117 dB peak 120 dB peak 122 dB peak 125 dB peak 122 dB cont e Peak 129 dB peak VERIS 1296 120 dB cont 127 dB peak Input Connection NL4 compatible locking NL4 compatible locking NL4 compatible locking NL4 compatible locking NL4 compatible locking connector with connector with connector with connector with connector with terminal strip in terminal strip in terminal strip in terminal strip in terminal strip in parallel parallel parallel parallel parallel Rigging Provisions 9 M6 threaded 9 M6 threaded 9 M6 threaded 9 M6 threaded 13 M10 threaded rigging fittings rigging fittings rigging fittings rigging fittings rigging fittings 4 threaded fittings 4 threaded fittings 4 threaded fittings 4 threaded fittings 4 threaded fittings for OmniMount 30 for OmniMount 30 for OmniMount 30 for OmniMount 30 for OmniMount 60 bolt pattern bolt pattern bolt pattern bolt pattern bolt pattern Construction 18mm 11 ply 18mm 11 ply 18mm 11 ply 18mm 11 ply 18mm 11 ply cross laminated birch cross laminated birch cross laminated birch cross laminated birch cross laminated birch Catalyzed polyester Catalyzed polyester Catalyzed polyester Catalyzed polyester Catalyzed polyester two part paint two part paint two part paint two part paint two p
11. deliver enough voltage and current to cause a harmful or lethal electric shock Shocks from very low frequencies such as kick drums can cause the human heart to stop beating at relatively low power levels WARNING After wiring the amplifier s to the loudspeaker s first power up all devices that are upstream of the amplifier such as mixers equalizers compressor limiters etc before powering up the amplifier This is to avoid passing any clicks or pops that may originate in the upstream devices to the loudspeakers The amplifier should initially be powered up with its gain controls turned all the way down After making sure that a continuous signal is present such as a CD playing slowly raise the level of the gain controls to establish that the wiring has been installed correctly Only then should the loudspeaker be operated at normal output levels Impedance and Paralleling Loudspeakers Loudspeakers of identical type may be connected together on the same amplifier forming a a parallel circuit When two loudspeakers are connected in parallel the nominal impedance of the circuit will divide in half For example if two 8 ohm loudspeakers are wired in parallel the result will be a 4 ohm load and the power from the amplifier voltage x current also written as VI or VA will be divided equally between both If four 8 ohm or two 4 ohm loudspeakers are wired in parallel the result will be a 2 ohm load Again the power will be divided e
12. discussed below Sound Quality Listen and compare An amplifier that performs well in bi amp mode with one manufacturer s loudspeaker may not perform as well when faced with the more complex load of a passive crossover in another manufacturer s loudspeaker Make sure to listen Community VERIS Series Operation and Installation Manual Page 25 Construction Quality Usually this is fairly evident by taking a good look at the product but not always Don t be fooled by excessively thick front panels that hide poorly built assemblies inside Look inside if possible but first make sure that the amplifier is powered down and disconnected from the AC Mains before disassembling An amplifier that s powered down and disconnected from the AC line can still cause a shock from the energy stored in its capacitors Be cautious When inspecting the amplifier things to note are an excessive number of internal connectors hardwired terminations are typically more reliable the quality of the pots fans and switches the presence of wire jumpers and or cut traces on PC boards these indicate that the design wasn t ready for production sheet metal screws versus machine screws machine screws are stronger and the method used to mount heavy components such as transformers and large capacitors large bolts and steel brackets are typically better than small bolts and gobs of silicon Protection Circuitry Most modern amplifiers can sustain a dead short on
13. informazioni Espanol Los altavoces descritos en este manual se disefian y son pensados ser volado o suspendido para el desempe o ac stico m ximo que utiliza una variedad de aparejar hardware de medios y de los m todos Es esencial que todo trabajo de la instalaci n que implique la suspensi n de estos productos del altavoz sea realizado por personas competentes y entrenada que entienden aparejar seguro las pr cticas La herida y o la p rdida severas de la vida pueden ocurrir si estos productos se instalan impropiamente Lea por favor la secci n a aparejar para la informaci n adicional Installation of loudspeakers should only be performed by trained and qualified personnel It is strongly recommended that a licensed and certified professional structural engineer approve the mounting design Community VERIS Series Operation and Installation Manual Page 6 VERI S SERI ES OPERATI ON MANUAL INTRODUCTI ON Thank you for selecting Community s VERIS Series VERIS is a stunning collection of affordable loudspeakers designed for permanent installation in venues such as nightclubs cafes discotheques houses of worship auditoriums lecture halls restaurants theatres and most anywhere else that people gather to enjoy music and hear the spoken word VERIS excels in applications requiring controlled coverage patterns high impact power response and intelligible sonic output VERIS loudspeakers are flexible easy to install
14. is close to zero The installer may however choose to use twisted pair loudspeaker cable for other reasons Certain amplifiers may exhibit instability when driving long lengths of wire installed in conduit A twisted pair will insure that the reactance of the loudspeaker cable is identical on both the plus and minus wires thereby presenting a more stable load to the amplifier Note that when specifying multiple twisted pairs of speaker cables intended to share the same conduit the conduit will need to be sized much larger than with loose or bundled conductors Community VERIS Series Operation and Installation Manual Page 22 Conductors and Insulation Solid conductor wire is slightly less expensive than stranded wire but much more difficult to pull through conduit Also it does not terminate to most speaker connectors as easily as stranded wire Therefore we recommend using stranded THHN type wire for installations that involve conduit Densely stranded cables typically used for portable cordage will coil up easily and lay flat on the stage making them a good choice for applications requiring portability such as floor monitors Typical examples are 14 2 and 14 4 SJO Such cable is normally stocked in many hardware stores Wire and cable insulation is always rated for a working voltage and a maximum temperature In power distribution systems wire and cables can get very hot making the temperature rating extremely important When
15. is reduced Because this circuit breaker is heat sensitive it provides a final level of protection that takes heat into account as well as power However unlike most implementations of circuit breakers that take time to cool down before resetting DYNA TECH circuits respond instantly to a reduction in level restoring the system to its full dynamic range without needing to wait for the circuit breaker to reset itself COOL COIL TECHNOLOGY The cone drivers used in the VERIS subwoofers utilize Community s patented Cool Coil heat evacuation technology A proprietary process Cool Coil employs an airflow director to remove heat from the voice coil thereby increasing both the performance and reliability of the cone drivers In particular the effect of Power Compression is significantly improved by Cool Coil technology Power Compression occurs when drivers respond non linearly to applied power producing less and less output as their voice coils heat up and their impedance rises High voice coil temperatures have other undesirable effects on performance Most materials used in drivers particularly adhesives and insulation suffer some diminished properties under extremes of heat Thermal expansion can result in warpage and misalignment of components A voice coil in which the diameter has increased due to thermal expansion will often no longer be round and certainly has a greater possibility of rubbing against the magnetic structure Any am
16. of phase to get the sound you want if you attenuate the peak at crossover with any of the methods described above you are reducing the power that s required to obtain a given sound pressure level This will result The three corrective methods referred to in the text equalizing high passing and increasing the slope of the crossover are all various implementations of equalization Community VERIS Series Operation and Installation Manual Page 31 in more available power more headroom and less demand on the drivers all of which lowers the potential for distortion and damage under high power conditions Now that you ve chosen the final physical locations for your full range loudspeakers and subwoofers established their optimum phase relationship and brilliantly EQ d any crossover peaks you re almost ready to permanently wire the system But first read the section below on Absolute Polarity Absolute Polarity Quite a bit has been written about absolute polarity particularly in regard to studio recording and hi fi sound reproduction The subject is however often ignored in the field of sound reinforcement Essentially positive absolute polarity refers to configuring the system so that upon the first cycle of excitation by the source material the driver s moves forward toward the listener thereby producing a positive wavefront For example at the instant of impact when the head of the kick drum moves outward towards the mi
17. panel used on VERIS loudspeakers equipped with an optional autoformer Such models are intended to be used in a 70V or 100V constant voltage distribution system VERIS 26T 2 WAY LOUDSPEAKER SYSTEM FIEL Iu 100W 200W SOW 100W Z00W NEC COMMUNITY IGHT amp OUND INE 313 Bost Sth i Chester PA 19013 USA Typical I nput Panel for Autoformer Equipped Models PIN DESI GNATI ONS The pin designation is as follows e C or common connects to the C or Ground connection on the amplifier typically a black binding post e One of the taps connects to the positive output of the amplifier typically a red binding post USING POWER TAPS A VERIS loudspeaker equipped with an optional autoformer has four taps These are set at 25W 50W 100W and 200W on the two larger models and 12 5W 25W 50W and 100W on the two smaller models By choosing one of the four taps you can govern how much amplifier power is available for each loudspeaker For example if the 50W tap is selected that particular loudspeaker will draw 50 watts of power when a 70V amplifier is run at its maximum level A second loudspeaker might be connected to the same amplifier but tapped at 100W 100 watts In such case the second loudspeaker will draw 100 watts from the same amplifier making it 3 dB louder than the first loudspeaker A third loudspeaker might be tapped at 200 watts which would make it 3 dB louder than the second loudspeaker an
18. rule of thumb is to use a pair of these models for venues that host up to approximately 200 persons By adding a second pair of either the VERIS12 or VERIS15 venues that host as many as 300 to 400 persons can be effectively covered Each pair of enclosures may be configured side by side or one over another to produce additional forward radiated power In rooms that are particularly wide but shallow in depth a second pair may be required simply to obtain the necessary horizontal coverage even if overall power is not an issue The VERIS15 with its 15 cone driver will provide additional low frequency content than that of the VERIS12 which has a 12 cone driver resulting in a richer fuller response However if either model is to be used with the VERIS210S or VERIS212S subwoofers the difference in the response between the VERIS12 and the VERIS15 will be minimal VERIS32 and VERIS35 models are true three way designs employing horn loaded mid range drivers in addition to their horn loaded high frequency drivers This design yields better directional control than a two way system The added directionality is an asset in reverberant rooms where it s important to keep the sound energy off of the walls floor and ceiling and or when there s a need to cover long distances either indoors or out Community VERIS Series Operation and Installation Manual Page 27 The larger VERIS35 with its 15 cone driver will provide deeper low frequency res
19. the power applied to them A red LED on the rear panel indicates that this protection circuit has been engaged Community VERIS Series Operation and Installation Manual Page 13 When the relay protection circuit is activated there will be a noticeable drop in the system s level approximately 3 to 4 dB The red LED as well as the drop in level serves as a warning to the operator that the loudspeaker is being overdriven When this stage of protection is engaged the level of the console and or the amplifier s output to the system should be reduced I MPORTANT If the operator continues to run the system at excessive levels or worse if the operator raises the drive level to compensate for the drop in output caused by the protection circuitry eventually an additional stage of protection will engage that shuts down the system entirely note that this additional stage of protection will never engage until after the second stage has been triggered If the system shuts down entirely the operator can immediately restore sound by simply reducing the drive level to the system Advantages of Community s DYNA TECH Circuitry There are numerous advantages to this type of multi stage protection circuitry The trip point is pre set to engage at exactly the same time on all speakers that are powered from the same amplifier The initial stages of DYNA TECH protection circuitry do not rely on and are not affected by heat build up Some manufacturers
20. their output without damage This is a good feature in the event that a driver shorts out or wiring becomes faulty Many designs have some protection scheme against DC on the output which usually happens if an output transistor fails This is another important feature as DC will almost instantly destroy LF and HF drivers Many amplifiers offer some sort of soft clipping protection which again is usually a good feature if it s properly implemented Review the specifications carefully Heat Dissipation Does the amplifier use forced air cooling i e fans or passive convection cooling If forced air can the fan filters be easily accessed and changed when they get blocked with dust If convection can the amplifier stand up to high ambient temperatures Will there be a problem when multiple amplifiers are installed adjacent to each other in equipment racks Some manufacturers require putting blank rack spaces between multiple amplifiers typically these are passively cooled designs which uses up a lot of valuable rack space Investigate carefully Tolerance to AC Mains Voltage Fluctuation Different designs of amplifiers exhibit widely differing behavior under fluctuating voltages Those that are built with linear power supplies will typically exhibit a proportional loss of power output capability when the AC mains voltage falls below the amplifier s nominal rating this is sometimes referred to as a brown out and they may shut down or be d
21. tightening the eyebolt if the eye is not aligned axially to the line of force a shim or washer should be installed to re position the eye The eyebolt should never be loosened or over tightened as a way of aligning its axial orientation If you re equipped in advance with a variety of washers and shim material you ll be able to safely install eyebolts with minimal difficulty Lastly never reeve slings in a basket type hitch through eyebolts see Figure 11 below Doing so will radically increase the strain on the eyebolts and on the slings from vector loading as well as permitting the load to tip or shift Figure 11 Never Reeve Cables 9 Threaded Fasteners Threaded fasteners are often used in rigging and mounting systems As with eyebolts many of Community s optional mounting brackets yokes and rigging plates utilize threaded fasteners The fasteners that come with each Community rigging kit are load rated to a sufficient strength to be safe when used within their specified parameters If replacement bolts are needed or if additional bolts are required for mounting a bracket to a beam wall or ceiling etc such bolts should be purchased from a reputable manufacturer with a minimum Grade 5 rating On hex head bolts this can be readily identified by looking at the head A Grade 5 bolt will be marked with three lines a Grade 8 bolt which is even stronger with six lines Allen drive fasteners are often made of high strength steel G
22. to test the response Ultimately as we ll see below it s best to keep the subwoofer in a polarity positive state If there is no discernable difference or only a very minimal difference in the measured or audible response when the polarity is reversed it indicates one of two things 1 The full range system that the subwoofer is being used with does not reproduce enough low frequency output to cause either cancellation or addition with the Community VERIS Series Operation and Installation Manual Page 30 subwoofer This would be true if the full range system is a very small loudspeaker like those that are used for front fill and underbalcony fill 2 The placement of the subwoofer in relation to the full range loudspeaker is not optimum Little or no response variation will occur if the physical relationship results in an approximate 1 4 wavelength of offset at the center of the crossover frequency The solution to 1 is for both systems to remain in positive polarity No harm will occur if the full range system simply does not reproduce enough low frequency energy to either add or cancel with the subwoofer s output The solution to 2 is to either change the physical relationship of the two systems or to delay one of the two systems whichever one is positioned closer to the listeners with a digital delay A high quality high resolution measurement system that can read and depict phase response or impulse response would be very
23. use circuit breakers that require heat build up before they trip this limits their ability to protect a cold speaker The trip points of such breakers are also affected by ambient temperature their own internal heating curves and small variations in speaker impedance or crossover component tolerances all of which can cause unpredictable behavior Because the first and second stages of Community s DYNA TECH circuits are not thermally sensitive they react nearly instantaneously to protect against an excessive increase in level Moreover the protection disengages almost immediately when the drive level to the system is reduced it is not necessary to wait for a circuit breaker to cool down This means that your loudspeaker can operate at its full dynamic range and still react quickly to protect against excessive musical peaks avoiding damage to the system It also means that your loudspeaker is protected from the moment the power amplifier is plugged in and turned on regardless of the ambient temperature As mentioned above the protection circuitry provides a third level of protection for the entire loudspeaker to guard it from severe misuse If the system is operated in the second stage mode of protection for a long period of time or if the input level is increased to try to overcome the volume drop from the second stage protection circuitry a solid state circuit breaker will trip and remove all signal from the loudspeaker until the input level
24. used with loudspeakers the temperature of the wire or cable will hardly ever rise more than 10 C above ambient and voltages will never exceed 300V which is the minimum rating of most industrial wire and cable Special cables are manufactured for installation in air plenums while others are made for direct burial Use of such products can save a lot of time and expense compared to installing conduit However local state or federal building codes may require that loudspeaker cables are installed in conduits or in cable trays Therefore it s a good idea to check applicable regulations carefully before beginning any installation In the United States conductors are sized according to a numbering system know as the American Wire Gauge or AWG Larger numbers such as 22 or 24 indicate smaller diameter wire while smaller numbers such as 10 and 12 indicate larger diameter wire In other parts of the world the metric system is widely used to define conductor diameter Metric equivalents can be converted to US AWG sizes with only a small loss of precision The larger the diameter of the conductor the lower the resistance will be for a given length Resistance is normally stated per foot or per hundred feet of wire For example 10 stranded copper THHN has a resistance of 204 ohms per hundred feet though this can vary slightly among manufacturers The resistance of the wire the impedance of the load and the output voltage of the a
25. useful in this situation However without such a system you can determine an effective delay time by trial and error Simply increment the delay time in small steps 1 ms until the action of reversing the polarity produces maximum cancellation in one orientation and maximum addition in the opposite By using a digital delay you will have preserved the phase and impulse response of the system and you can now filter out any objectionable mid bass overlap with an equalizer If a delay is not available it is recommended that either the subwoofer or the full range loudspeaker be relocated closer together so that reversing the polarity of either the subwoofer or the full range loudspeaker but not both at once will result in a distinct dip at crossover as discussed above If this cannot be done due to physical restrictions the subwoofer and the full range loudspeaker should be moved further apart again until there is a distinct dip at the crossover frequency in one position of polarity It may take some trial and error to determine the optimal physical relationships listening tests before you finalize the locations especially important in permanent installations Make sure to use live microphones and live instruments if applicable as well as track playback Choosing the physical location of the loudspeakers in the room is always the most important part of any successful system installation Q C TI P It s a good idea to experiment with d
26. 00 Hz wave is approximately 11 3 feet in length These extremely long wavelengths cause behavior that s quite different from their shorter mid and high frequency counterparts First long wavelengths do not see small or moderate size obstructions as obstacles they simply diffract around such barriers as if they re not there Second the substantial length of low frequency waves can make it difficult to distinguish their source direction This is why a single subwoofer can often be used successfully to augment a stereo pair of mid high loudspeakers without unduly harming the stereo separation and image Third low frequency waves tend to add together quite graciously even if their sources are separated by considerable distances as long as they are in phase with each other An example of this in operation is the typical accentuation or build up of low frequency content that is often experienced in the middle of theatres and concert halls generated by subwoofers placed far apart on the opposite sides of the stage Community VERIS Series Operation and Installation Manual Page 28 Overall the characteristics mentioned above imply that the location of a subwoofer is not particularly critical and to a certain extent that is true However there are several factors to consider before you finalize your intended location Some of these are 1 A subwoofer will benefit greatly in terms of power output when it s placed adjacent to boundary
27. 15 LF 1x12 LF 1 x 15 LF 2 x 10 LF 2 x 12 HF 1x 1 MF 1 x 6 5 MF 1 x 6 5 HF 1x 1 HF 1 x 1 Nominal Dispersion VERIS 1564 60 x 40 VERIS 3264 60 x 40 VERIS 3564 60 x 40 360 x 180 360 x 180 H x V VERIS 1596 90 x 60 VERIS 3294 90 x 40 VERIS 3594 90 x 40 Operating Range 60 Hz 18 kHz 60 Hz 18 kHz 55 Hz 18 kHz 40 Hz 500 Hz 37 Hz 500 Hz Frequency Response 80 Hz 13 kHz 3dB 80 Hz 13 kHz 4dB 70 Hz 13 kHz 4dB 50 Hz 150 Hz 3dB 50 Hz 125Hz 1 5dB Max Input Ratings 200W RMS 40V 200W RMS 40V 200W RMS 40V 300W RMS 34 6V 300W RMS 34 6V 500W PGM 500W PGM 500W PGM 750W PGM 750W PGM 990W PEAK 990W PEAK 990W PEAK 1485W PEAK 1485W PEAK Sensitivity 1W 1m VERIS 1564 100dB SPL VERIS 3264 100dB SPL VERIS 3564 101dB SPL 93 dB SPL 95 dB SPL free space SPL VERIS 1596 99dB SPL VERIS 3294 98dB SPL VERIS 3594 99dB SPL 50 Hz 160 Hz 50 Hz 160 Hz 125 Hz 10 kHz 1 3 octave bands Maximum SPL VERIS 1564 VERIS 3264 VERIS 3564 118 dB cont 120 dB cont e Continuous 123 dB cont 123 dB cont 124 dB cont 125 dB peak 127 dB peak e Peak 130 dB peak 130 dB peak 131 dB peak VERIS 1596 VERIS 3294 VERIS 3594 122 dB cont 121 dB cont 122 dB cont 129 dB peak 128 dB peak 129 dB peak Input Connection NL4 compatible locking NL4 compatible locking NL4 compatible locking NL4 compatible locking NL4 compatible locking connector with connector with c
28. FICATIONS VERIS 15 32 35 210S 212S csseeeeseen Hmmm 10 GETING ACQUAINTED arkinen aaa Du eaneaea EDD M II DIL MONS DE DLI DIDEQIP QU EIU IMd DE I EDEN 11 Physical Features Of VERIS Full Range Models sssssssssss mms 11 Physical Features Of VERIS SUbDWoOOfe s cereis esesesesezezeretest ene ne cama Re ERR RN a 12 GENERAL DESCRIPTION 5 o dsko ui tii ne PE wise ted aa gp RR MM DI MM A LUND ELI Xe rIDEU DEA Dc M eaten 13 DYNA TECH DRIVER PROTECTION SYSTEM uscire E po eye te sai peo tenu OPI Dex Fio v Rud NEU PUES 13 Advantages Of Community s DYNA TECH Circuitry ssssssseeeseeen menn 14 COOLSCOIE TECHNOLOGY 352 eene viven Eo a e RON Ra ORC SU SU VOSU EROS CDU Muda QE Tea Fo ge uER uoa E QeU dh 14 AIGH PASS FILTER G serai oUdea e dias EREOISC otausmamias SU DEA I DNO d dT Un DIU FLLDISQ D adn oT dd E 15 CHOOSING SIGNAL PROCESSORS vita ia euet lote repond des Seen ve ase tub uade ua ire mer aeons 16 USING PROTECTIVE THMETERS duas ze dax vd PEE va UEM ADAQURVUUTA Y Qao OE RE MUNERE OU DR CEN DO DD a UAE BU AIDE 16 CONNECTING THE AMPLIFIER TO THE LOUDSPEAKER rxpr EE OS xEuobepi Rl i ue eri iip pEO CX p RDDOE RE 18 VERISJAPPHCATIONS 225559 5 cdltaxstu abeat eese toin madsen leet cS OR dU PIA M REM 27 POSITIONING SUBWOOFERS 36e mus nDenspdbn Men aoa cpu bL MN a tnu OLEI EON DN CODEC 28 SYSTEM EQUALIZATION 28958225 22g Ets d o dUteDLE EA D s Bg asve n UPxtur DM Epi nea Rd dIRDUPEPPIO PP PIE PROEE 32 RIGGING AND MOUNTING
29. Hardware Black 108947R Grille VERIS212S w Hardware White FOOTKIT Rubber Foot Kit 4 Community VERIS Series Operation and Installation Manual Page 45 WARRANTY INFORMATI ON AND SERVI CE Transferable Warranty Limited Valid in the USA Only Community loudspeaker systems are warranted in the USA to be free from defects in materials and workmanship for a period of five years as determined by one of the following two methods whichever is longer 1 Starting from the date of retail purchase as noted on the sales receipt from an authorized Community dealer OR 2 Starting from the date of manufacture determined by the serial number if the sales receipt is not available This warranty applies to the product therefore the remainder of the warranty period will be automatically transferred to any subsequent owner This warranty applies only to failure of a Community loudspeaker caused by defects in materials and workmanship during the stated warranty period It does not apply to a unit that has been subjected to abuse accident modification improper handling installation or repairs made without factory authorization or by anyone other than authorized Community Field Service Stations This warranty is void if the serial number has been defaced altered or removed Products covered by this warranty will be repaired or replaced at the option of Community without charge for materials or labor provided all the terms of this wa
30. RI ES Below are descriptions of mounting brackets suspension kits and other accessories manufactured by Community for use with VERIS loudspeakers In this section the terms suspension and fly mean the same thing to elevate the loudspeaker enclosure above the ground surface Consult the user s guide included with each part for detailed safety instructions It is the responsibility of the installer to insure that safe installation practices are followed Installation of loudspeakers should only be performed by trained and qualified personnel It is strongly recommended that a licensed and certified professional structural engineer approve the mounting design IMPORTANT All rigging fittings should remain sealed otherwise air leaks will occur in the enclosure that can compromise the low frequency performance with distortion and reduced output WARNING VERIS rigging fittings are rated at a Working Load Limit of 100 Ibs 45 4kg with a 10 1 safety margin No single rigging fitting should ever be subjected to a load that is greater than 100 Ibs Failure to heed this warning could result in injury or death VERI S Handle amp Stand Socket Model No V HSS The V HSS accessory for VERIS 6 26 8 28 attaches to the loudspeaker enclosure s rear OmniMount bolt patterns to create a stand socket mount amp convenient carrying handle It is zinc plated and made of black powdercoated steel Perfect for A V professionals Seat Track Kit Model
31. VERIS ENCLOSURES 50 559 35 SERERE Oi aux DER SEI DI AREIS XE RAM REPE 35 VERIS MOUNTING BRACKETS AND ACCESSORIES esstossubo pe yatvo Se mrevbP ER MT DPF cuo Au UNI REQUE 42 SERVICING VERIS LOUDSPEAKERS c otra tes rupta Sz vnu DTA IS Hr PNE CIT URUd DO ELTETE 43 SERVICING VERIS LOUDSPEAKERS cresta aE at nd ote a rump e need ratr Digest eed a elects 45 WROUBLESHOOTING GUIDE ariran EE anA ET tenes aS RR RNeCoku US DNE ROUEU RUE MAN REM EUEE eh 44 REPLACEMENT PARTS merona edad atia aa TAM sopa b cda Cou n EO DC tad ve r2d bota tado a ead 45 SUMMING THINGS UP usce to vive eaa id veut ut dUr one DER bd a vpr ec Da VU c ei cdd oth 47 WARRANTY INFORMATION AND SERVICE 25 2 setae deux edet Io dence E EDU eres E ved cea 46 Notice Every effort has been made to insure that the information contained in this manual was complete and accurate at the time of printing However due to ongoing technical advances changes or modifications may have occurred that are not covered in this manual Community VERIS Series Operation and Installation Manual Page 4 TABLE OF FI GURES Following is a list of figures found in this manual Figure Title H Physical Features of a Typical VERIS Full Range Model 11 Physical Features of a Typical VERIS Subwoofer 12 Community s Cool Coil Heat Evacuation System 15 VERIS Input Panel 18 VERIS Input Panel Optional Autoformer Version 19 NL4 Type Connector 21 7 Effect of Clipping on a Sinewave 25 Effect of B
32. akers component parts brackets and hardware are assembled and installed in strict accordance with Community s installation guidelines either contained herein or elsewhere Beyond this Community assumes no further or extended responsibility or liability in any way or by any means whatsoever It is the responsibility of the installer to insure that safe installation practices are followed and that such practices are in accordance with any and all local state federal or other codes conditions and regulations that may apply to or govern the practice of rigging mounting and construction work in the relevant geographic territory Any modifications made to any parts or materials manufactured or supplied by Community shall immediately void all pledges of warranty or surety related in any way to the safe use of those parts and materials 1 Load Rated Components All components of the rigging system such as wire rope shackles chains eyebolts etc must be load rated This means that they are marked or rated with a Safe Working Load SWL or Working Load Limit WLL All such items should be designed and manufactured by reputable companies that regularly supply the theatrical and industrial rigging industries such as The Crosby Group or equivalent It is strongly recommended that you source your rigging items from an industrial supplier or specialty rigging house never from a hardware store Items found in local hardware stores are often
33. amaged if the AC voltage suddenly increases Conversely those that are built around switching type power supplies may be tolerant of a drop in AC mains voltage with no loss of output capability Such designs may also be tolerant of an increase in AC voltage that s well above nominal Many developing countries and some parts of well developed countries routinely experience a wide range of voltage fluctuations particularly during times of peak demand Certain generators that are used to power outdoor systems may also exhibit wide voltage fluctuations Before making a choice of amplifier type it s a good idea to know as much as possible about the characteristics of the available power where the system is to be used Damping Factor This specification refers to the amplifier s ability to dampen the motion of the driver during intervals when the amplifier is not producing output power When a driver is energized it continues to stay in motion for at least a few cycles after the power applied to it has been discontinued from stored kinetic energy momentum During these intervals such as in between kick drum beats the driver is temporarily generating electric current that flows back into the amplifier called back EMF If the amplifier has a high damping factor it will do a good job of electronically braking or dampening the motion of the driver This will result is an audibly tighter and punchier sound quality compared to an amplifier that has a
34. art No Description VERI S32 Part No Description Speaker 6 5 Mid Frequency VERI S210S PartNo Description O Z OZ O 108923R Speaker 10 LF 108830R Crossover VERIS210S 108943R Grille VERIS210s w Hardware Black 108944R Grille VERIS210s w Hardware White FOOTKIT Rubber Foot Kit 4 VERI S8 PartNo Description Speaker 8 Horn HF VERIS8 w Driver Crossover VERIS8 8 Ohm Version Crossover VERIS8T Autoformer Version Grille VERIS8 w Hardware Black Grille VERIS8 w Hardware White Mounting Yoke VERIS8 Black Mounting Yoke VERIS8 White VERIS28 Part No Description Speaker 8 Horn HF VERIS28 w Driver Crossover VERIS28 8 Ohm Version Crossover VERIS28 Autoformer Version Grille VERIS28 W Hardware Black Grille VERIS28 W Hardware White Mounting Yoke VERIS28 Black Mounting Yoke VERIS28 White VERIS15 Part No Description Speaker 15 LF HF Driver UC 1 Horn HF VERIS15 60x40 Horn HF VERIS15 90x60 Crossover VERIS15 Grille VERIS15 w Hardware Black Grille VERIS15 w Hardware White VERIS35 Part No Description Speaker 15 LF Speaker 6 5 Mid Frequency HF Driver UC 1 Horn HF VERIS35 60x40 Horn HF VERIS35 90x40 Crossover VERIS35 Grille VERIS35 w Hardware Black 109531R Grille VERIS35 w Hardware White VERIS212S Description 108922R Speaker 12 LF 108573R Crossover VERIS212S 108946R Grille VERIS212S w
35. art paint available in black available in black available in black available in black available in black or white or white or white or white or white Meight 15 5 in 395 mm 17 0 in 433 mm 22 5 in 572 mm 25 5 in 649 mm 23 9 in 607 mm Width 00 9 8 in 249 mm 11 3 in 287 mm 9 8 in 249 mm 11 3 in 287 mm 15 4 in 390 mm Depth 10 1 in 258 mm 11 7 in 298 mm 10 1 in 258 mm 11 7 in 298 mm 14 3 in 362 mm 16 5 Ibs 7 5 kg 21 5 Ibs 9 8 kg 22 5 Ibs 10 2 kg 31 Ibs 14 1 kg 36 5 Ibs 16 6 kg 19 Ibs 8 6 kg with 24 5 Ibs 11 1 kg with 26 5 Ibs 12 0 kg with 35 Ibs 15 9 kg with Autoformer Autoformer Autoformer Autoformer VERIS models 6 8 26 28 include a yoke style mounting bracket at no additional charge These four models may be ordered with an optional 200W autoformer to accommodate 70V 100V system designs see page 19 in this Operation Manual for information on the autoformer taps Due to ongoing development specifications are subject to change without notice Community VERIS Series Operation and Installation Manual Page 9 VERI S Specifications Model VERIS 15 VERIS 32 VERIS 35 VERIS 210S VERIS 212S Loudspeaker Type Two way full range Three way full range Three way full range Dual driver subwoofer Dual driver subwoofer trapezoidal vented trapezoidal vented trapezoidal vented rectangular vented rectangular vented bass bass bass bass bass Driver Complement LF 1 x
36. asteners or they must be kept in place to seal the enclosure from air leaks If the rigging fittings do not remain sealed air leaks will occur in the enclosure that will compromise the low frequency performance with distortion and reduced output Community VERIS Series Operation and Installation Manual Page 8 VERI S Specifications Model VERIS 6 VERIS 8 VERIS 26 VERIS 28 VERIS 12 Loudspeaker Type Two way full range Two way full range Two way full range Two way full range Two way full range trapezoidal vented trapezoidal vented trapezoidal vented trapezoidal vented trapezoidal vented bass bass bass bass bass Driver Complement LF 1 x 6 LF 1 x 8 LF 2 x 6 LF 2 x 8 LF 1 x 12 HF 1 x 3 4 HF 1 x 3 4 HF 1 x 3 4 HF 1 x 3 4 HF 1x 1 Nominal Dispersion 90 x 70 90 x 70 90 x 70 90 x 70 VERIS 1264 60 x 40 precum rn VERIS 1296 90 x 60 Operating Range Range 100Hz 18kMz Hz 18 100Hz 18kMz 90 Hz 90Hz 18kHz 90Hz 18kHz 70Hz i18kHz Hz 18 70Hz i18kHz 70Hz i18kHz Hz 18 70Hz i18kHz 60 Hz 18 kHz Frequency Response 125 Hz 10 kHz x3dB 100 Hz 10 kHz 4 5dB 90 Hz 10 kHz 3dB 90 Hz 10 kHz 4dB 90 Hz 13 kHz 3dB Max Input Ratings 100W RMS 28 3V 150W RMS 34 6V 200W RMS 28 3V 300W RMS 34 6V 250W PGM 375W PGM 500W PGM 750W PGM 200W RMS 40V 500W PGM 500W PEAK 750W PEAK 990W PEAK 1485W PEAK 990W PEAK Sensitivity 1W 1m 90 dB 91
37. ay to do things Over the years our technologies have been imitated and our methods have become common practice throughout the professional sound industry However developments like carbon fiber diaphragm compression drivers still stand alone and well ahead of the competition Just a few of Community s unique accomplishments include the following e First successful fiberglass mid high frequency and large format bass horns e First compression loaded mid range horn for touring systems the LMF e First suspension less diaphragm HF driver the VHF100 e First mid range full decade 200 Hz 2 kHz high power compression driver the M4 e First carbon fiber diaphragm compression drivers M4 EM280 EM282 e First Ferrofluid cooled professional woofers the VBS Series e First product series with all drivers Ferrofluid cooled e First air cooled loudspeakers for touring systems AirForce e First 3 way cinema loudspeaker systems Paramount Executive Studio Theatre Warner Bros screening theatre and dubbing rooms e First electro acoustic system to equal the sound level of pneumatic warning sirens e First to provide loudspeaker coverage over an entire country Denmark Emergency System e First comprehensive calibrated data acquisition of sound reinforcement products e First integral signal aligned 3 way sound reinforcement systems RS Series e First pro audio company with an Internet Web site e First all horn loaded
38. be the effect of wire resistance on the damping factor of the loudspeaker amplifier network is even greater for a given resistance value Fora description of Damping Factor see page 26 Amplifier designers intend for the output impedance of their amplifiers to be as low as possible in order to achieve a high damping factor However the laws of physics dictate that a very low output impedance will cause the resistance of the speaker cable to have a significant effect on the amplifier speaker network Unfortunately there s no way to get around it Example With five feet of 10 AWG feeding a 4 ohm load a given amplifier exhibits a respectable 100 1 damping factor With fifty feet of 10 AWG feeding the same 4 ohm load the damping factor decreases to 10 1 which is likely to be audible as a loss of punch and tightness in the low frequencies Unless the power amplifiers are located directly alongside the loudspeakers a good design technique to consider when possible it will be difficult to maintain a high damping factor without using impractically large conductors Therefore keeping cable lengths as short as possible is the most practical and cost effective way to maintain a respectable damping factor without incurring undue difficulties C TI P Although it s beyond the scope of this manual to test and rate the many specialty loudspeaker cables sold in audio shops studies conducted by skilled engineers have conclusively shown that t
39. crophone the speaker cones will also move outward Obviously the polarity integrity of the entire signal processing chain must be maintained for this to occur Is absolute polarity audible Should you be concerned Yes it is audible and though subtle it makes a big enough difference to warrant taking the time needed to insure that the signal chain is polarity positive throughout You ll hear an improvement in sonic impact especially in the lower frequencies We recommend that absolute polarity be kept positive in all low frequency devices whenever possible This can be checked with a small handheld style polarity response test unit available from numerous manufacturers Although it s easy to simply reverse the polarity of the subwoofer to determine its best polarity relationship to the full range loudspeaker system if the best position turns out to be reversed we recommend that you instead reverse the full range system s so that the subwoofer s can remain in a state of positive absolute polarity SYSTEM EQUALI ZATI ON There are numerous schools of thought on proper equalization techniques Some believe that using anything more than a touch of equalization is wrong often attributing their concerns to phase shift introduced by the equalizer Others believe the opposite Some say equalization can t be performed correctly without advanced instrumentation while others say it must be done by listening after all the end product isn t a gra
40. d 6 dB louder than the first Community VERIS Series Operation and Installation Manual Page 19 By using the various taps one can balance the relative sound levels in a system A loudspeaker that is closer to audience members will need to be tapped at a lower wattage than one that is farther away in order to produce similar levels Typically every time you double the distance from a sound source the level drops by 6 dB which is equivalent to one fourth of the power Although this is an acoustical law and is true in a free space environment such as outdoors be aware that the effect of room acoustics can radically change the actual results Even outdoors it is normally not possible to validate this acoustical law using a sound level meter due to the ground plane effect That said the use of pink or white noise to excite the system and a sound level meter to take nearfield measurements will help you precisely balance the relative level of each loudspeaker in a sound system Just make sure to take your readings at an identical distance from each of the loudspeakers in the system otherwise the results will be skewed 70 7V and 100V SYSTEMS Several voltage standards have been put in place regarding so called constant voltage systems In the United States 25V 70 7V and 100V are common Occasionally 140V systems can be found usually in very large venues such as racetracks where the need to overcome cable resistance by scaling th
41. d on the VERIS Specification Table on Page 9 in this manual these may be used as an aid in calibrating limiter settings Using a true RMS voltmeter you can measure the output of your amplifier when driven by a sine wave generator and adjust the limiter to prevent the amplifier s output voltage from exceeding the stated maximum Make sure to do this with the loudspeaker disconnected Be aware however that static voltage settings made by taking measurements derived from exciting the system with a sine wave generator or other constant voltage source will represent only a part of the picture The other part is the time constant If the attack and Community VERIS Series Operation and Installation Manual Page 17 release times are too long the limiter will not protect against short term transients in fact it may never engage at all In summary a protective limiter can go a long way towards preserving the lifespan of a loudspeaker system but only if the system is sized properly to begin with and the limiter is carefully adjusted to properly complement the system Obviously it s safer to err on the conservative side as the opposite approach may result in driver damage or complete system failure CONNECTI NG THE AMPLI FI ER TO THE LOUDSPEAKER All VERIS Series loudspeakers come with two methods of connecting the amplifier to the loudspeaker One is an industry standard NL4 type locking connector and the other is a terminal strip Thes
42. d their close cousin Compressors are used in music recording and sound reinforcement to create certain effects such as perpetual sustain of guitar and bass notes They re also widely used to reduce or eliminate peak levels from vocalists percussionists and other dynamic sources as well as often being employed to avoid overdriving amplifiers and loudspeakers Limiters that are suitable for protecting loudspeaker systems are available as stand alone products as well as typically being included as a function of many DSP based loudspeaker controllers or loudspeaker management systems Limiters typically allow adjustment of some or all of the following parameters Threshold Input Level Output Level frequently called makeup gain Attack Time Release Time Compression Ratio Virtually all limiters allow the user to set the threshold or level at which point gain reduction will occur Most models also permit the user to adjust the limit ratio Ratio refers to the magnitude of gain reduction At a 2 1 ratio every 2 dB increase in input level above the threshold will result in a 1 dB increase in output Ata 10 1 ratio every 10 dB increase in level above the threshold will also result in a 1 dB increase in output From these two examples you can readily see how the Ratio control settings will drastically affect the dynamic range Incidentally the term limiting generally refers to ratios of 10 1 or higher some say 20 1 wher
43. de the friction that keeps the two parts of the rope from separating Never orient a U bolt so that it is on the live or tension side of the wire rope Wire rope that s properly terminated with high grade rope clips will result in approximately 80 of the strength of the wire rope itself As an example if a specific wire rope has a rated Working Load Limit of 1000 Ibs that rating will be reduced to 800 Ibs when the wire rope is terminated with wire rope clips Conversely Nicopress fittings see below are capable of providing terminations that are equal to the strength of the wire rope itself 6 Nicopress Fittings Like wire rope clips Nicopress fittings are used to terminate wire rope ends They consist of an oval sleeve of malleable metal typically copper aluminum or stainless steel that s pressed onto the wire rope with significant force using a specially designed tool Nicopress is the proprietary brand name of one manufacturer but has become nearly a generic name among riggers As with wire rope clips fittings of similar design to Nicopress are available from multiple manufacturers of varying quality If high grade fittings are properly installed with the correct tool this is a big if they will form a termination that is equal in strength to the wire rope itself As with all rigging components it is strongly recommended that you purchase such fittings and tools from professional supply houses not from local hardware stores Gen
44. e range program at moderate levels listen to each driver to isolate the problem Replace as needed This usually means that the loudspeaker is being constantly overdriven and the crossover protection circuits are reducing the power to the loudspeaker as a protective measure Reduce the volume level to the loudspeaker Check all connections and cabling for shorts or loose connections Even one small wire strand shorting the signal terminals anywhere in the system can cause this problem This usually means that the loudspeaker is being constantly overdriven and the crossover protection circuits are reducing the power to the loudspeaker as a protective measure Reduce the volume level to the loudspeaker to restore full dynamic range Community VERIS Series Operation and Installation Manual Page 44 SERVI CI NG VERI S LOUDSPEAKERS Servicing a VERIS loudspeaker is straightforward and easy All drivers may be replaced by removing the screws that attach the protective grille to the front of the enclosure The crossover is serviceable by removing the input panel on the rear of the enclosure There are no other user serviceable parts REPLACEMENT PARTS The following replacement parts may be ordered through authorized Community Service Stations Please contact Community for your nearest Service Station VERI S6 Part No Description VERI S26 PartNo Description Z VERI S12 P
45. e two connectors are wired in parallel with each other on all models Figure 4 VERIS Input Panel The following figure is an example of a typical input panel used on VERIS loudspeakers A similar panel is used on all standard low impedance VERIS models The loudspeaker is intended to be connected directly to the amplifier LOUDSPEAKERS PROFESSIONA L 2 WAY LOUDSPEAKER SYSTEM IMPEDANCE 812 POWER CAPACITY 100 W RMS 250 W PROGRAM PINS 1 COMMUNITY LIGHT amp SOUND IME 333 Bost Sth i Chester PA 19075 USA Typical Standard nput Panel PIN DESI GNATI ONS For all models the pin designation is as follows e NL4 Pin 1 or the terminal screw labeled connect to the positive red output of the amplifier e NL4 Pin 1 or the terminal screw labeled connect to the negative black output of the amplifier Note that the NL 4 and the terminal strip are wired in parallel and that Pins 2 and 2 on the NL4 connector are not utilized Community VERIS Series Operation and Installation Manual Page 18 CAUTI ON Be sure to carefully observe polarity when wiring your loudspeakers If one loudspeaker is wired with the opposite polarity from another loudspeaker acoustic cancellation will occur The result will be less acoustic power output than if only one loudspeaker were used by itself Figure 5 VERIS Input Panel Optional Autoformer Version The following figure is an example of the input
46. e voltage up is extremely important In Europe and Asia most constant voltage systems use the 100V standard A VERIS loudspeaker equipped with the optional autoformer will support both the 70 7V and 100V standards The same screw terminals are used for both voltage standards but the power level of the tap is different depending on whether the voltage is 70 7V or 100V Note that on the rear input panel the power levels above the horizontal line refer to a 70 7V system while the power levels below the line refer to a 100V system A 100V system will produce twice the power at a given tap as that of a system run at 70 7 volts This can be verified by the simple Ohm s Law calculation E Z W where E is the voltage applied Z is the load impedance and W is the power expressed in Watts Assuming a load impedance of 50 ohms we can see that 70 7 x 70 7 50 99 97 and that 100 x 100 50 200 Therefore when scaling up from 70 7V to 100V the power will double when scaling down the power will halve CAUTI ON Be sure to carefully observe polarity when wiring your loudspeakers If one loudspeaker is wired with the opposite polarity from another loudspeaker acoustic cancellation will occur The result will be less power output than if only one loudspeaker were used by itself C TI P When using the barrier strip for wiring we recommend that you first terminate the wire with a plated copper crimp on type spade lug using moderate to heavy pre
47. eas compression is the term used for lower ratios such as 2 1 or 4 1 In fact the only distinction between compression and limiting is the ratio of gain reduction Many limiters will allow the user to set the time constant that determine the length of the transients that are permitted to pass before the limiting function engages this is called Attack as well as the time span in which the limiter will recover or return to a state of non limiting called Release When used to protect a loudspeaker system the limiter should be set so that gain reduction engages at some point before damage occurs to the drivers If the threshold is set too low Community VERIS Series Operation and Installation Manual Page 16 the resultant sound quality will be squashed In other words the dynamic range of the program material will be reduced to a degree that is audibly unpleasant Conversely if the threshold is set too high the limiter will not engage early enough to protect the loudspeaker system from damage It is very difficult to suggest exact limiter settings because the ideal setting for one system and one style of music may be undesirable for another system or another style of music Coupled with this the dynamic response characteristics of the amplifier s used in the system also play a large role in determining proper limiter adjustments Amplifiers differ from one make and model to another in their dynamic headroom capability
48. ed to the owner freight prepaid If the problem is not covered under this warranty the owner will be notified of the problem with an estimate of the repair costs Consequential and Incidental Damages Community shall not be liable for any consequential or incidental damages including without limitation injury to persons property or loss of use Some states do not allow Community VERIS Series Operation and Installation Manual Page 46 the exclusion or limitations of consequential or incidental damages so the above limitations and exclusions may not apply This Community warranty is not extended by the length of time which an owner is deprived of the use of the product Repairs and replacement parts provided under the terms of this warranty shall carry only the remaining portion of the warranty Community reserves the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured While this warranty gives specific legal rights there may also be other rights that vary from state to state No action to enforce this warranty shall be permitted ninety days after expiration of the warranty period Warranty Information and Service For Countries Other Than The USA To obtain specific warranty information and available service locations for countries other than the United States of America contact the authorized Community Distributor for your s
49. ension in other words at a zero degree angle to the suspension point When an object is suspended from more than one point the points may or may not be at zero degrees to the suspension point When the suspension points are not at zero degrees to the object they form a bridle As the angle of the bridle increases the force through each leg of the bridle also increases see Figure 9 below A high angle bridle can produce forces in the suspension legs that are many times the weight of the suspended object This is counterintuitive as most people s understanding of physics would suggest that the object cannot produce a greater load than that of its own weight Not true For example a 100 Ib object can produce 300 Ibs of force at a bridle angle that may not appear dangerous to the untrained observer At very steep angles the load can far exceed the rating of even the most robust rigging components in addition to placing an enormous compression or expansion force on the object itself depending on the direction of the bridle Therefore steep bridle angles are to be avoided under all circumstances Figure 9 Load Angles Even more dangerous is the practice of reeving a suspension cable or sling through two shackles or eyebolts forming a type of basket hitch see Figure 10 This again increases the force through each leg as well as significantly increasing the loading on the shackles It also allows the load to easily tip or shift
50. ent quiper les pratiques s res La perte s v re de et ou de blessure de vie peut arriver si ces produits sont incorrectement install s S il vous plait lire la section d quiper pour l information suppl mentaire Deutsch Die Lautsprecher die in diesem Handbuch beschrieben werden sind entworfen und sind zu sein geflogen vorgehabt oder sind f r maximale h rbare Leistung verschiedene Manipulierenhardware Mittel und Methoden suspendiert benutzend Es ist wesentlich dass alle Installationarbeit die die Aufh ngung von diesen Lautsprechernprodukten verwickelt von fahigen ausgebildeten Personen durchgef hrt werde die sichere Manipulierenpraxis verstehen Schwere Verletzung bzw Verlust des Lebens k nnen stattfinden wenn diese Produkte unrichtig installiert sind Bitte lesen Sie den Abschnitt ber Manipulieren f r zus tzliche Informationen Italiano Gli altoparlanti descritti in questo manuale sono disegnati e sono intesi essere volato o sospeso per la prestazione massima acustica usando una variet di attrezzare di hardware i mezzi ed i metodi E essenziale che tutta il lavoro di installazione coinvolgendo la sospensione di questi prodotti di altoparlante eseguita da dalle persone competenti addestrate che capisce le pratiche di attrezzare di cassaforte La lesione severe e o la perdita di vita possono accadere se questi prodotti sono erratamente installati Per favore di leggere la sezione di attrezzare per le ulteriori
51. ent has left your dealer or the Community factory the responsibility for damage is always borne by the freight company If damage has occurred during shipping you must file a claim directly with the freight company It s very important to contact the freight company as soon as possible after receiving your shipment as most freight companies have a short time limit within which they will investigate claims Make Sure to save the carton and the packing material as most claims will be denied if these materials are not retained Your Community dealer and the factory will try to help in any way they can but it is the responsibility of the party receiving the shipment to file the damage claim It s always a good idea to retain the carton and packing materials indefinitely if possible in the event that the unit may need to be returned to your dealer or distributor for repair in the future Each shipping carton contains the following items e Loudspeaker System Qty 1 e Operation Manual Qty 1 e Warranty Card Qty 1 DANGER VERIS rigging fittings are rated at a Working Load Limit WLL of 100 Ibs 45 4kg with a 10 1 safety margin No single rigging fitting should ever be subjected to a load that is greater than this stated limit Failure to heed this warning could result in injury or death IMPORTANT The flat head Allen drive rigging screws that come installed in each enclosure must either be replaced with rigging brackets and threaded f
52. fail under the prevailing conditions Safety factors may be regulated by local state federal or international agencies and therefore may vary based on your geographic location Safety factors typically assume normal environmental conditions additional consideration must be given when unusual conditions are encountered such as in corrosive marine environments e g loudspeakers mounted on a cruise ship or in a venue located near sea water or in conditions involving high vibration high wind loads or other unusual conditions A common safety factor is a 6 1 ratio however many theatrical rigging companies voluntarily work at a 7 1 ratio or higher A 10 1 ratio is required in most countries that are members of the European Union At a 10 1 ratio this means that a component rated at 10 000 Ibs of ultimate strength should never be subjected to a load greater than 1 000 Ibs The de rated value of 1 000 Ibs should take into account the additional force of dynamic loading such as when a motorized hoist starts and stops Such dynamic loading can easily exceed 200 of the static load and is dependent on the hoist design how close to capacity it is loaded the length of the cable or chain and the elasticity of the supporting structure Seismic Considerations Seismic events earthquakes can cause great dynamic loading of a rigging system In the case of strong quakes which occur regularly in some regions a rigged system may merely sway back and forth w
53. he majority of such cables offer no real performance advantages and in some cases notable disadvantages over that of readily available industrial grade wire SELECTI NG AMPLI FI ERS Amplifiers are a vital part of any sound system s performance capability As such they should be carefully selected for appropriate power output as well as for other attributes more on this later A table is provided below to help you size your amplifiers power output capability to the various models in the VERIS line Model Recommended Power VERIS6 Full range 200 to 300 WRMS at 82 VERIS8 Full range 310 to 450 WRMS at 82 VERIS26 Full range 420 to 600 WRMS at 4 VERIS28 Full range 630 to 900 WRMS at 4Q Note WRMS Watts RMS Watts Root Mean Squared Community VERIS Series Operation and Installation Manual Page 24 A WORD ABOUT CLI PPI NG Clipping occurs when an amplifier is driven to the point where its output can no longer accurately reproduce the waveform presented at its input When driven hard enough its output voltage can t swing any higher so the resultant waveform is said to be clipped see Figure 7 below Figure 7 Effect of Clipping on a Sinewave Unclipped Clipped Effect of Clipping on Sinewave Most waveforms that occur in music and speech are the complex conjugate of sine and triangle waves Such waveforms have a relative short duty cycle cresting to maximum voltage for only a small part of each cyclic repet
54. hen it s installed in a room Community VERIS Series Operation and Installation Manual Page 32 Logic dictates that whatever changes occur to the response of the loudspeaker in the room are dependant entirely on the effect of the room unless of course we wired the loudspeaker wrong or broke it in transit which we didn t Now as we listen to our loudspeaker we hear things we didn t hear in the free field environment It sounds bass heavy It sounds like there s a buildup of energy somewhere say around 300 Hz We also hear something happening at about 600 Hz What do we do Let s measure it Let s assume we have a narrow band a high resolution FFT based measurement instrument and a perfectly flat microphone these do actually exist Should we measure it nearfield say about 1 meter away Why not Somewhere we heard that s a good thing to do We place the microphone about 1 meter from the loudspeaker and we look at the response It s quite flat Not like it looked when we measured it outdoors but not all that different Overall the lower frequencies exhibit a gradual rise in amplitude as they drop in frequency but there s also some rolling hills up to about 800 Hz We grab our graphic equalizer and try to smooth out these rolling hills and the rise in the bass response A cut at 63 Hz merely puts a hole in the response at 63 Hz it doesn t fix the rolling hills But the loudspeaker does sound less bass heavy when we run the m
55. i MO ZR m jf Meer TRAMA oce t Un di 7 B1 lt gt lt ql FF CI Ae VA PLAT z YY j YY RY KY Z AKEN 7 NY SiUG K f d d f T Z CONVENTIO NAL VENTED POLE PIECE VENTED POLE PIECE WITH AIRFLOW DIRECTOR HI GH PASS FILTERS We strongly encourage the use of an external active high pass filter to protect the cone drivers from excessive low frequency excursion A high pass filter will eliminate the potential of low frequency modulation from wind noise turntable rumble stage vibration and other causes that result in a poorly defined and muddy bass response Additionally a high pass filter will avoid wasting amplifier power by keeping the amplifier from attempting to reproduce frequencies below the loudspeaker s intended operating range The table below shows the recommended filter settings fete High Pass Filter VERIS6 Full Range 100 Hz 24db octave VERIS8 Full Range 90 Hz 24db octave VERIS26 Full Range 80 Hz 24db octave VERIS28 Full Range 70 Hz 24dB octave VERIS12 Full Range 60 Hz 24db octave VERIS15 Full Range 60 Hz 24db octave VERIS32 Full Range 60 Hz 24db octave VERIS35 Full Range 60 Hz 24db octave VERIS210S Subwoofer 40 Hz 24db octave VERIS212S Subwoofer 40 Hz 24db octave Community VERIS Series Operation and Installation Manual Page 15 CHOOSING SIGNAL PROCESSORS A wide variety of equalizers and loudspeaker control systems are available from numerous manufacturers Mo
56. ical VERI S Full Range Model PHYSI CAL FEATURES OF VERI S FULL RANGE MODELS FEATURE TOP amp BOTTOM RIGGING POINTS PROTECTIVE GRILLE GRILLE RETENTION SCREWS THREADED FITTINGS FOR OMNIMOUNT INPUT PANEL REAR PULL BACK POINTS DESCRI PTI ON M6 or M10 threaded fittings depending on model Powder coated steel grille protects drivers from foreign objects 6 x 5 8 sheet metal screws Remove grille to service drivers Fits OmniMount 30 or OmniMount 60 series depending on model For amplifier connection to the loudspeaker NL4 and terminal strip are wired in parallel Used for angling enclosure downward not intended for primary rigging Community VERIS Series Operation and Installation Manual Page 11 Figure 2 Physical Features of a Typical VERI S Subwoofer PHYSI CAL FEATURES OF VERI S SUBWOOFERS FEATURE DESCRI PTI ON RIGGING POINTS M10 threaded fittings Four 4 on each side panel Powder coated steel grille protects drivers from foreign PROTECTIVE GRILLE i objects GRILLE RETENTION 6 x 5 8 sheet metal screws Remove grille to FEET Four synthetic rubber feet protect surfaces from marring INPUT PANEL For amplifier connection to the loudspeaker NL4 and terminal strip are wired in parallel e SCREWS service drivers Community VERIS Series Operation and Installation Manual Page 12 GENERAL DESCRI PTI ON VERIS Series loudspeakers are designed for de
57. ifferent loudspeaker locations by conducting Note that in some acoustical environments the system may sound better when the phase relationship is non optimum resulting in a dip at crossover compared to optimum phase where the crossover region is accentuated by the overlap of the subwoofer and the full range speaker s However this is not the best way to achieve the sound that you re seeking The proper course of action is to equalize EQ the peak at crossover with a parametric equalizer until the response is flat or until you ve achieved the tonal response you desire we ll explain why below Alternatively you might insert a high pass filter in the full range system typically at 80 100 Hz with a 12dB octave slope so that the overlap with the subwoofer is reduced in magnitude A third technique is to increase the slope of the crossover to 24 dB per octave or 48 dB per octave if the crossover has such capability thereby reducing the bandwidth of the spectrum in which the two sources overlap There s an important reason for taking one or more of the measures discussed above If that nice sounding response dip at crossover is in fact due to phase cancellation it means that the drivers and amplifiers will be working harder than they should to produce less sound pressure level than they are capable of due to the acoustic cancellation taking place All that cancelled energy uses power unnecessarily Instead of putting the two systems out
58. ith no damage or it may be subjected to many times its static load rating particularly in the case of unequal loading of a multi part suspension system due to uneven roof or beam movement It s also possible that one loudspeaker rig may contact another rig or a lighting truss during the quake The results cannot be predicted because seismic events occur with differing forms of wave motion at varying axes to the suspended system An earthquake might produce long rolling waves in one axis then later an aftershock on the same day could produce short violent waves in another axis Aging of Components Over time hardware components used for rigging will degrade causing them to lose some or even much of their load capacity Factors include strain oxidation exposure to corrosive or acidic atmospheric conditions exposure to water and chemicals exposure to UV light and metal fatigue In consideration of long term durability a high safety factor should always be chosen particularly when future conditions cannot be clearly foreseen which is almost always the case 3 Safety Cable All loudspeakers lighting instruments and any other object that is rigged or suspended in any way this includes the use of wall brackets must be fitted with one or more safety cables Safety cables are a backup method of suspension intended to keep the rigged object in the air in the event that the primary suspension system fails Safety cables must be sized ap
59. ition When an amplifier clips it s because it s reached its maximum voltage potential so it starts to square off the crest of the waveforms This more or less turns the waveform into a square wave Why is this bad Because unlike a sine wave or a triangle wave both of which crest for only a short duration a square wave crests for a much longer duration It can be described in technical terms as exhibiting a long duty cycle In effect a square wave is telling the loudspeaker to move forward in an infinitely short period of time then to dwell there for a while then to move backward in an infinitely short period of time then to dwell there for a while then to repeat the process Whenever a loudspeaker has current running through its voice coil but is not actually moving such as at the lengthy peaks of a square wave all of the electrical energy is turned into heat instead of sound Square waves will create rapid heating in even the most robust of drivers leading to equally rapid driver failure Therefore it s better to choose an amplifier that s overly large for your loudspeaker but will remain out of clipping at high levels than one that s too small and prone to clip Other attributes to consider in making a selection of amplifier type are Sound Quality Reliability Protection Circuitry Heat Dissipation Method Tolerance to Voltage Fluctuation Damping Factor Signal to Noise Ratio Controls and Features These items are briefly
60. its weight in the hitch It should always be avoided Figure 10 Never Reeve Cables Community VERIS Series Operation and Installation Manual Page 38 5 Wire Rope Clips Wire rope clips sometimes called Crosbys after one manufacturer s trade name should always be of the drop forged type never of malleable steel They must always be installed in accordance with the manufacturer s instructions and specifications Although specific instructions will vary depending on the design of the clips and the diameter of the wire rope such instructions will always include the number of clips the length of the turn back the spacing of the clips torque of the nuts and the orientation of the U bolt Using too few clips too little turn back spacing the clips improperly over tightening or under tightening the nuts and improperly orienting the U bolts can all cause catastrophic failure Overlooking the importance of re tightening the nuts after load is applied can also lead to failure The prudent installer will be prepared in advance by having a calibrated torque wrench in his her toolbox As a general rule there should never be less than three wire rope clips on wire rope of 1 8 to 1 4 in diameter and more on larger diameter rope Clips should be evenly spaced and the U bolts should always be oriented so that they are on the dead end of the wire rope as they will cause damage to the live end This is extremely important as the U bolts provi
61. ker and the room Because it takes time to complete a period of resonance this time period alters the systemic phase response as well as the frequency response If one could precisely cancel out the variation in phase response with an FIR filter the result would be the inverse or a perfectly flat frequency response curve It s a wholly organic process in which phase response and frequency response are intrinsically linked The ideas and techniques described above can be extended to arrays clusters delay systems and distributed systems Managing the various zones of a large scale sound system is of course much more complicated but the basic techniques remain the same Properly applied equalization can be a powerful tool with benefits extending even into the time domain as we ve illustrated above The potential for radical improvement in both the phase and frequency response through the use of precision equalization can even make a large reverberant room sound significantly smaller This is because the reverberant field in a room is typically longer and higher in amplitude at frequencies where it exhibits excessive resonance than throughout the remainder of the audible spectrum By reducing the energy from the sound system at those resonant frequencies the room may no longer sound particularly reverberant at all When using precise measurement equipment additional useful processes can be brought to bear For example instead of flatteni
62. ld be avoided whenever possible as they can pull out as the wood ages or swells due to changes in temperature and humidity The professional rigger will instead utilize machine bolts of Grade 5 ratings or higher rated beam clamps brackets fabricated and welded by certified welders wire rope wrapped around beams with cushioning materials and so on In cases where lag bolts are the only practical choice choose a size that is substantially stronger than the load requires to avoid failure through aging make sure to drill an appropriate pilot hole and do not under or over tighten If the lag bolt does not firmly seat against the support material because the pilot hole is too large or the material has a void in it start over in a new location Certain wooden beams or trusses made of many laminations often called Glue Lams for short are intolerant of holes These beams are commonly used in modern construction particularly in tilt up concrete industrial buildings Drilling a hole through such beams can set up internal fractures resulting in total failure of the beam Alternatives to drilling include fabricating steel brackets to surround the beam or wrapping the beam with a steel sling and fabric cushions to derive a hang point Concrete expansion bolts such as Hilti Kwik bolts or equivalent can provide an excellent means of attaching moderate loads to concrete surfaces However as they rely on an expanding wedge to obtain their strength the
63. let you see this effect and a parametric equalizer will allow you to adjust for it With an FFT you can even use music as your test tone to continually measure the changes in the room response during a performance A two port FFT configured to take continual measurements in the transfer function mode doesn t care what the signal is it s just as happy resolving music as it is resolving pink noise swept sine waves or other sources Noise just happens to provide much faster results because of its broadband nature RI GGI NG AND MOUNTI NG VERI S ENCLOSURES One of the most important tasks the installer faces is the rigging and mounting of the loudspeaker system VERIS loudspeakers have been designed with rigging and mounting in mind thus there are numerous ways to safely and easily install VERIS loudspeakers in optimal locations in the venue SAFETY FIRST There is no way to overemphasize the importance of safety But we ll try The kinetic energy of an 80 Ib loudspeaker enclosure dropping from 30 feet and contacting a concrete floor is enormous The loudspeaker will be traveling at a speed of about 35 miles per hour at the time of impact Imagine if you were seated under it You might have a better chance of surviving a dynamite blast Community VERIS Series Operation and Installation Manual Page 35 If you do not have knowledge of safe rigging practices and experience in applying them contact a qualified rigging contractor to desig
64. ls Distortion from the loudspeaker at moderate to high volume levels Low or no output from the low frequency driver Low or no output from the low frequency driver Low or no output from the mid frequency driver applies to three way systems only Low or no output from the high frequency driver Low volume level Low volume level No sound No sound or very low volume Noises from the loudspeaker buzzes or rattles Noises from the loudspeaker buzzes or rattles Sound cuts in and out at high levels Sound cuts in and out Sudden 6 dB loss in sound level PROBABLE CAUSE Faulty connection to the loudspeaker Possible solder joint failure on crossover card Too little amplifier power Driver is malfunctioning Low frequency driver crossover or amplifier is malfunctioning Mis wired NL4 compatible locking connector Mid frequency driver crossover or amplifier is malfunctioning High frequency driver crossover or amplifier is malfunctioning System gain is too low Signal or speaker wire connection is shorted Amplifier is not on or loudspeaker is disconnected No audio signal Grille or hardware is loose Driver is malfunctioning The crossover protection circuits have been activated Bad connection The crossover protection circuits have been activated WHAT TO DO Using an ohmmeter check the continuity of the wiring to the lo
65. manding day to day use in a wide range of fixed installations Their high quality driver components are housed in rugged acoustically inert enclosures equipped with rigging fittings VERIS systems are characterized by a high power low distortion linear response that provides exceptional musicality and speech intelligibility The VERIS line consists of 10 models e VERIS6 a6 34 two way in a trapezoidal enclosure e VERISS an 8 34 two way in a trapezoidal enclosure e VERIS26 a dual 6 34 two way in a trapezoidal enclosure e VERIS28 a dual 8 34 two way in a trapezoidal enclosure e WVERIS12 a 12 1 two way in a trapezoidal enclosure with a choice of 60 x 40 or 90 x 60 horn patterns e VERIS15 a 15 1 two way in a trapezoidal enclosure with a choice of 60 x 40 or 90 x 60 horn patterns e VERIS32 a 12 6 5 1 three way in a trapezoidal enclosure with a choice of 60 x 40 or 90 x 40 horn patterns e VERIS35 a 15 6 5 1 three way in a trapezoidal enclosure with a choice of 60 x 40 or 90 x 40 horn patterns e VERIS2106 a dual 10 subwoofer in a rectangular enclosure e WVERIS212S a dual 12 subwoofer in a rectangular enclosure Note the specification table on pages 9 and 10 depicts dimensions weights and detailed specifications of the ten VERIS models described above VERIS loudspeakers may be used in multiples forming clusters and arrays Systems may be designed around horizon
66. may benefit greatly from such capabilities while others may not need these features or cannot justify the extra cost We recommend that you carefully align your budget with your actual needs In most situations you ll probably benefit more by installing an adequate number of loudspeakers and amplifiers than by spending money on features that might not actually contribute to better performance VERI S APPLI CATI ONS The VERIS Series of loudspeakers can fulfill numerous application requirements Some of these are Sound Reinforcement in Houses of Worship Theatrical Sound Reinforcement Coffee House Systems Music Reinforcement in Concert Halls amp Performing Arts Centers Night Club and DJ Sound Systems Auditoria Sound Reproduction Audio Visual Presentations in Hotel Meeting Rooms and Ballrooms Health Club Exercise Music and Instruction Corporate Training Facilities Themed Entertainment Venues Retail Environments VERIS loudspeakers are equally suited for use in system designs based on distributed speakers exploded clusters tight clusters and arrays General Application Guidelines In choosing the right VERIS product for your application the initial factors to consider are the size of the venue the style of music and speech to be reproduced and the location s of the loudspeaker s In smaller venues with less demanding musical styles one can usually achieve excellent results with the VERIS12 and the VERIS15 models A good
67. metallic high frequency diaphragms provide a further reduction in distortion by eliminating the mechanical resonance normally associated with brittle metallic materials e Community s patented Cool Coil heat evacuation technology minimizes cone driver power compression and ensures long term reliability used in subwoofers e DYNA TECH active protection circuitry reduces the likelihood of driver damage under abusive conditions e Rugged 11 ply 18mm cross laminated Birch enclosures coated with a two part catalyzed polyester paint for durability e Protective steel grilles covered with durable powder coat finish Community VERIS Series Operation and Installation Manual Page 7 e Load rated threaded rigging fittings on tops bottoms and rear of enclosures for safe amp easy rigging e NL4 compatible locking connector with terminal strip in parallel for easy connectivity e Factory designed rigging hardware and mounting brackets available from stock e Smaller models may be ordered with an optional low distortion low insertion loss autoformer for 70V and 100V applications e All models available in black or white finish at no additional cost UNPACKING AND INSPECTION VERIS loudspeakers are inherently rugged and are carefully packed in sturdy cartons However it s wise to thoroughly inspect each unit after it has been removed from the packaging aS damage could occur during shipping Please note that once the shipm
68. mplifier will determine how much loss occurs in the wire These parameters also govern the damping factor of the amplifier speaker combination more on this later Below is a table that gives a quick look at the effect of wire size on line loss These numbers assume that the amplifier is producing a constant 48 Volts at its output terminals which is equivalent to 288 watts into an 8Q load or 576 watts into a 4Q load Size Length Wero MA Loss in dB The worst case scenario shown above is the 200 run of 14 AWG into a 4 ohm load This will result in a staggering loss of 3 55 dB or more than half of the amplifier s total power output Use of wire that s one size smaller 16 AWG would cause a power loss of 5 11 dB This approaches a 75 loss of total available power As you can readily see it s very Community VERIS Series Operation and Installation Manual Page 23 important to use the largest gauge wire that you possibly can particularly when long lines are unavoidable Note NL4 compatible connectors easily accept 12 AWG C TI P When choosing cable for a situation that requires only two conductors consider using 14 4 that is 14 AWG with 4 conductors and wiring each pair of conductors in parallel at both ends of the cable This will provide the equivalent conductance of 11 AWG but in a cable that s more easily obtainable and smaller in diameter The Effect of Wire Gauge on Damping Factor As significant as power loss can
69. n and carry out the installation Rigging that is improperly installed is like a time bomb sooner or later it will fail with the potential to cause serious injury paralysis dismemberment or loss of life Even if no one is directly in the line of fall of a failed suspension system the panic that might ensue could in itself cause multiple deaths Do not take chances RI GGI NG GUI DELI NES The following guidelines on rigging are not intended as a comprehensive rigging manual nor are they meant to replace the knowledge of safe rigging practices that might be obtained from receiving professional training on the subject These guidelines are intended only to provide basic safety information and to call your attention to some commonly made mistakes Books seminars and hands on courses are available that teach safe rigging techniques we highly recommend that you seek them out if you do not already possess the requisite knowledge and experience to perform rigging work safely DI SCLAI MER Community warrants that its loudspeaker systems and its optional mounting and rigging hardware have been carefully designed and tested Community loudspeakers may be safely mounted and rigged when each loudspeaker model is installed with Community manufactured optional mounting and rigging brackets specifically designed for use with that particular model of loudspeaker This warranty applies only for use under normal environmental conditions and when all loudspe
70. ng the ancillary underbalcony and over balcony systems first look at the spectral content of the energy that s arriving in those areas solely from the main array s located far forward in the room Typically you ll see that there s already too much low frequency content You might also see a local zone resonance that wasn t noticeable in the forward section of the room And there might be an excess of energy at some particular mid spectrum frequency By shaping the delay system to add only the portion of the spectrum that s lacking from the main house array s and precisely delaying it to within a millisecond of the true propagation time an ancillary delay system can wonderfully improve the listener s experience in what are often referred to as the cheap seats Additionally when an ancillary delay system is additively aligned as described above its overall energy contribution is lower and therefore it is far less prone to reflecting energy back into the room that could easily corrupt the sound in the forward seating areas particularly if the delay speakers are operated at high levels Keeping their delay time accurate relative to the true propagation time between the delay system and the main house system is very important If a delay system is set let s say 7 8 9 or 10 milliseconds longer than it needs to be it will usually sound perfectly fine to the local listener but its reflected energy will be late and therefore more likely to cau
71. of the full range system relative to the subwoofer is a function of their physical placement in relation to one another This is known as the Phase Relationship of the two systems though Absolute Polarity plays a role as well which will be discussed later Depending on the placement of the subwoofer in relation to the full range loudspeaker s as well as the selected crossover point the optimal response of the system might be obtained by reversing the polarity of the full range loudspeaker s The easiest way to determine the proper polarity is to excite the system with a test signal such as pink noise and to view the resultant response on an audio spectrum analyzer If such equipment is not available it is also possible to determine the best polarity relationship by careful listening One orientation of polarity either normal or reversed should result in a discernable dip through the crossover region due to acoustic cancellation The opposite polarity should result in either a flat response or a peak through the crossover region due to acoustic addition Note When experimenting to determine the proper polarity you can reverse the full range loudspeaker s or the subwoofer but never both at the same time reversing both at the same time will not alter the phase relationship of the two systems If there is one subwoofer and several full range enclosures in the same system it will of course be easier to reverse the subwoofer s polarity
72. onnector with connector with connector with terminal strip in terminal strip in terminal strip in terminal strip in terminal strip in parallel parallel parallel parallel parallel Rigging Provisions 13 M10 threaded 13 M10 threaded 13 M10 threaded 8 M10 threaded 8 M10 threaded rigging fittings rigging fittings rigging fittings rigging fittings rigging fittings 4 threaded fittings 4 threaded fittings 4 threaded fittings for OmniMount 60 for OmniMount 60 for OmniMount 60 bolt pattern bolt pattern bolt pattern Construction 18mm 11 ply 18mm 11 ply 18mm 11 ply 18mm 11 ply 18mm 11 ply cross laminated birch cross laminated birch cross laminated birch cross laminated birch cross laminated birch Catalyzed polyester Catalyzed polyester Catalyzed polyester Catalyzed polyester Catalyzed polyester two part paint two part paint two part paint two part paint two part paint available in black or available in black or available in black or available in black available in black white white white or white or white am man eum minime memsnem usmixUmm usmiseme am mamie iranran Demum 227in ea0mm psamisumm pen semine isan 30mm isan soam ssmrMemm usmieemm am aa siasa omassa sse s210 6751730010 Due to ongoing development specifications are subject to change without notice Community VERIS Series Operation and Installation Manual Page 10 GETTI NG ACQUAI NTED F ure 1 Physical Features of a Typ
73. oundary Surfaces on Power Output 29 Load Angles 38 0 11 Never Reeve Cables 38 Never Reeve Cables 40 IMPORTANT SAFETY INFORMATI ON Always follow these basic safety precautions when using or installing VERIS loudspeakers and accessories Read these instructions Keep these instructions Heed all warnings Follow all instructions particularly those pertaining to rigging mounting hanging and electrical connections 5 Only use accessories that are specified and approved by the manufacturer Dur The terms CAUTI ON WARNI NG and DANGER are used throughout this manual to alert the reader to important safety considerations If you have any questions or do not understand the meaning of these terms do not proceed with installation Contact your local dealer distributor or call Community directly for assistance These terms are defined below CAUTI ON describes an operating condition or user action that may expose the equipment or user to potential damage or danger WARNI NG describes an operating condition or user action that will likely cause damage to the equipment or injury to the user or to others in the vicinity DANGER describes an operating condition or user action that will immediately damage the equipment and or be extremely dangerous or life threatening to the user or to others in the vicinity D Am Occasionally in this manual you ll come across some useful tips that are intended to help you get
74. ount of cooling that can be applied to a woofer will be beneficial One very commonly used cooling method is venting of the pole piece of the magnet structure Community VERIS Series Operation and Installation Manual Page 14 The motion of the cone assembly will pump air in and out of the cavity under the dust cap This air passing through the pole vent helps to cool the magnet structure Community has improved on this common cooling method by introducing an airflow director US patent 6 390 231 into the air path Figure 3 shows a conventional woofer motor with a vented pole piece and also a similar motor with the addition of an airflow director The voice coil former in the airflow motor is aluminum and is taller than normal This extended aluminum former becomes a cooling fin for the voice coil and the airflow director causes the air to pass in close proximity to the former By directing the air to flow over the hot aluminum former more heat is removed from the voice coil than simply allowing the pumped air to take its natural path in and out of the cavity This results in woofers that can handle higher power with greater reliability than those of conventional design Figure 3 Community s Cool Coil Heat Evacuation System eee AIRFLOW DIRECTOR EN Pd A K Fa n 2 Z DU F bs J z zw z TT Vi y xf R xN HI LA P WC ple ul pue S It zl ING ALP eo i J AAZ i IL A NS io YY p n WY V f YY XY or B
75. ourse EQ a room you can only EQ the sound system in the room But much of the world refers to the process of equalizing a system as room tuning Community VERIS Series Operation and Installation Manual Page 33 improved the phase response You ve got to get your hands on one of these FFT things and soon OK Let s put this event into more scientific terminology Here s what s happening the loudspeaker is transferring its acoustic energy into the room This energy presents itself in the form of pressure waves causing cyclical pressure and rarefaction in the room s atmosphere Under excitation the volume of air in the room begins to resonate as confined volumes of air tend to do This is not a particularly large room so its primary resonant frequency is quite high at 362 Hz The second harmonic of that frequency is also present at 725 Hz Going back and looking more carefully one would probably see additional third order harmonic resonant modes and possibly a sub fundamental mode as well Other parts of the room particularly if it s a complex architectural design might exhibit their own resonant modes at different frequencies such as in the underbalcony area But why was the phase response improved merely by applying frequency equalization The answer is simple The peaks in amplitude at 362 and 725 Hz that were removed by the equalizer were caused by systemic resonance the system being the sum of the loudspea
76. ower subtraction caused by destructive interference Destructive interference occurs when waveforms meet and are partially or wholly out of phase with each other due to unequal path lengths Conversely if multiple subwoofers are located directly adjacent to one another their power output will add together almost seamlessly This is known as constructive acoustic addition However this may produce an undesirable hot spot of low frequency energy that might possibly be too close to a seating area It s always a good idea to experiment with trial locations before finalizing your installation plan Even a very experienced sound system designer cannot predict the precise effect that one location may have over that of another if he she is not intimately familiar with the room acoustics When planning loudspeaker locations it s wise to discuss the matter with someone who may have prior experience operating sound systems in that particular room such as the resident mixing engineer if the building has previously had a sound system installed in it Polarity Unless the full range loudspeaker s is stacked directly on top of the subwoofer s with its cone drivers aligned with the subwoofer cone drivers it s likely that the phase relationship of the two systems may not be optimal This can be tested by reversing the polarity of one system relative to the other as described below First however it s important to understand that the correct polarity
77. pecific country or region SUMMING THINGS UP VERIS loudspeakers and accessories are intelligently designed to provide you with effective solutions for common and not so common sound reinforcement problems These great looking and superb sounding building blocks can be utilized in a wide variety of ways By giving careful consideration to your application needs and taking the time to properly position focus adjust and equalize your system VERIS products will provide years of satisfying service If questions or special needs arise at any time the professional staff at Community will be happy to offer experienced technical advice to assist you J Community VERIS Series Operation and Installation Manual Page 47 Community Community Professional Loudspeakers 333 East Fifth Street Chester PA 19013 4511 USA Tel 1 610 876 3400 Fax 1 610 874 0190 www communitypro com 2007 All Rights Reserved
78. phic display it s an audible event One engineer would never equalize a sound system with a parametric equalizer while another would not use a graphic equalizer A well known sound designer once stated that when the equalizer is switched in and out if he couldn t hear the difference he considered the system to be properly tuned As these examples illustrate there are widely varying beliefs on the subject of equalization Instead of touting a particular philosophy let s approach the practice of equalization by looking at the transfer function of the loudspeaker and room together We can do this with a two port FFT analyzer For the sake of this short discussion let s assume that the loudspeaker we re using exhibits a perfectly flat frequency and phase response in a free field environment We re going to assume this because it will help to illustrate the point of the discussion The fact that few if any loudspeakers are perfectly flat in a free field environment is not of paramount importance nor is the fact that many high quality loudspeakers can actually be equalized to be almost perfectly flat if one wants to go through the exercise of doing so The point here is to illustrate the principal of precisely correcting for room resonance So here we have a loudspeaker installed in a room We already know that this loudspeaker exhibits a flat response in a free field environment such as outdoors or in an anechoic chamber But what happens w
79. ponse than that of the VERIS32 which employs a 12 cone driver but here again the difference in response will be minimal if either model is used with a VERIS subwoofer The small VERIS6 and VERIS8 loudspeakers are ideal for small rooms 25 75 persons as well as for distributed systems in large rooms They can also be used as delay speakers augmenting a larger system to balance out the levels from the front of the room to the rear of the room The practice of driving small speakers through a delay line is used in many theatrical systems concert hall systems and houses of worship It gives the installer a powerful tool when it comes time to equalize and balance the system In large rooms and especially those in which the acoustical conditions are not ideal we strongly recommend the use of under balcony delay speakers over balcony delay speakers front fill speakers etc In areas of the room that are too far away from the primary loudspeaker s to enjoy clear intelligibility the addition of local delay speakers can do wonders in solving problems The VERIS26 and VERIS28 models provide twice the woofer cone area of their smaller cousins The second woofer cone provides more overall power with greater bass response These models are a good choice for distributed music systems such as in health clubs bars restaurants and the like The VERIS line includes two subwoofers the 210S employs dual 10 drivers while the 212S features dual
80. poor copies of the original designs and may not be safe as well as typically being more costly than items purchased from an industrial supplier By planning ahead you will not be in the uncomfortable position of having to delay the work if you can t locate a shackle or eyebolt at the last minute 2 Safety Factor No component in a rigging system should be stressed to its maximum load rating A suitable Safety Factor or Design Factor must be determined and applied so that every component in the rigging system has reserve load capacity The manufacturer s stated SWL Safe Working Load or WLL Working Load Limit is the quotient of the component s ultimate strength or breaking point divided by the manufacturer s stated safety factor If the safety factor is not stated on the component or in the manufacturer s technical specification sheet the component should not be used as its ultimate strength is unknown 6 Normal Environmental Conditions are defined as the following 15 to 559 C no excessive or unusual air born contaminants or pollutants present no chemicals or contaminants coming in direct contact with the product no excessive vibration or unusually high wind loads Community VERIS Series Operation and Installation Manual Page 36 In addition to the manufacturer s rated Safety Factor the prudent installer will determine and apply an additional Safety Factor to insure that the suspension system is installed in a manner that cannot
81. poor damping factor The effect of damping factor is especially pronounced when the amplifier is used with large relatively heavy cone drivers like those found in large format subwoofers This specification is typically expressed as a whole number or a ratio such as 200 into 8 ohms or 200 1 into 8 ohms A higher number is better Signal to Noise Ratio Signal to noise ratio refers to how much hum and noise the amplifier produces It is typically expressed as either a positive or negative number e g gt 100 dB or 100 dB A higher number which indicates lower noise is better Slew Rate Slew rate refers to how rapidly the amplifier can produce output voltage when an input signal is applied It is expressed as volts per microsecond V us Typical numbers range from 20V us to 40V us or higher A high slew rate reflects an amplifier that can more accurately reproduce the dynamic content of the input signal However an Community VERIS Series Operation and Installation Manual Page 26 amplifier with a lower slew rate may tend to sound bigger and warmer than one with a higher slew rate Listen and compare see Sound Quality Controls and Features In addition to the standard gain controls and front panel lights many of today s amplifiers offer such features as adjustable high pass filters remote control of gain remote monitoring of various parameters line voltage monitoring and even full blown DSP signal processing Some installations
82. propriately for the loads they will carry and should be attached to a different point or points on the wall ceiling truss frame bumper or other support device than that of the primary suspension system They should also be attached to a different point or points on the objects that are being suspended Shock Loading of Safety Cables A safety cable must have as little slack in it as possible so that if the primary suspension system fails causing the load to switch from the primary suspension to the backup safety cable the shock will be minimized An object that falls and is caught up short places enormous strain on its safety cable A 100 Ib loudspeaker falling just several inches can create a shock load as great as 500 Ibs It s difficult to precisely calculate the strain of a shock load unless you know the elasticity of the safety cable as well as all other components in the suspension system Suffice it to say that this is rarely known with accuracy Therefore in order to insure safety the total potential stress subjected to the safety cable and any components that are used with it should always be a small fraction of the ultimate breaking strength of the weakest component Community VERIS Series Operation and Installation Manual Page 37 4 Load Angles This is an area that is often misunderstood so let s clear it up Whenever an object is suspended from one point it has no choice but to hang directly below that point of susp
83. qually among the loudspeakers If an uneven number of loudspeakers are to be connected in parallel you can use the following formula to calculate the resultant impedance where Z is the impedance in ohms 1 Z1 1 22 1 23 1 Zt Z In the above formula Z1 is the impedance of the first loudspeaker Z2 is the impedance of the second loudspeaker Z3 is the impedance of the third loudspeaker etc and Zt is the sum total of the loudspeaker impedances Here is an example using 3 loudspeakers each with an 8 ohm impedance 1 8 1 8 1 8 1 0 375 2 6666 ohms Unequal I mpedances It s important to note that when wiring loudspeakers of unequal impedances in a parallel circuit the power will not be divided equally among each loudspeaker For example if an 8 ohm and a 4 ohm loudspeaker are wired together in parallel the resultant load will be 2 6 ohms However the 4 ohm loudspeaker will draw twice as much current from the amplifier Community VERIS Series Operation and Installation Manual Page 21 as the 8 ohm loudspeaker In this example if the amplifier is capable of producing 1800 watts into the 2 6 ohm load of the combined loudspeakers the 4 ohm loudspeaker will receive 1200 watts while the 8 ohm loudspeaker receives only 600 watts This will make the 4 ohm loudspeaker 3 dB louder than the 8 ohm loudspeaker which is effectively twice the volume level Know Your Amplifier Not all amplifiers can safel
84. rade 5 or better if they are purchased from an industrial suppler As with any other rigging component check the rating on the box or the manufacturer s specification sheet to be sure Community VERIS Series Operation and Installation Manual Page 40 10 Support Points amp General Practices A vital part of planning the mounting or suspension system is to first determine the strength of the building s support points Nothing should be assumed even for the lightest loads A ten pound loudspeaker falling from ten feet can maim or kill just as readily as a heavy loudspeaker array falling from thirty feet The services of a registered structural or professional engineer should be employed to determine if the materials and design of the supporting structure are adequate to support the intended load and how to best install mounting brackets or derive suspension points Fabric Webbing Slings and Spansets Fabric webbing fabric slings and polyester Spansets can be very useful to the rigger They are strong lightweight and do not have stray wires on their ends that can cut fingers like wire rope slings They re particularly useful as a means of securing a personal safety device such as a climbing harness when working at elevation That said be cautious of using them in permanent installations as they are far more prone to damage by fire than their steel counterparts Fasteners As a general rule lag bolts driven into wooden beams shou
85. rating rapidly decreases At 45 the eyebolt has only 30 of its rated strength At 909 it is de rated to only 25 Use at angles steeper than 45 is strongly discouraged Such use would be permissible for breasting back a loudspeaker to alter its downward angle where the breast line is not part of the suspension system nor is it considered to be the safety cable Vertically rigging a loudspeaker from eyebolts placed into its side surfaces which creates a 90 strain angle on the eyebolts must always be avoided When eyebolts must be angularly loaded it is vitally important to design any multi point suspension installation with a low bridle angle see Load Angles and to de rate the eyebolt accordingly Proper Tightening of Eyebolts If the shoulder eyebolt is not properly tightened its angular load bearing ability will significantly decrease leading to rapid failure Make sure to follow the eyebolt manufacturer s instructions for proper tightening The prudent installer will be prepared in advance carrying a calibrated torque wrench in the toolbox and a way of coupling it to the eyebolt We recommend cutting a groove into the sides of a large socket as a means of using the torque wrench to tighten the eyebolt Eyebolt Orientation A shoulder eyebolt should only be angularly loaded in the long axis of the loop of the eye it should never be laterally loaded Loading against the axis of the eye can cause breakage at even a very low force After
86. rranty have been met Obtaining Warranty Service Warranty service may be obtained from the factory or from an authorized Field Service Station To obtain factory or field warranty service for products purchased in the United States return the product for inspection to the address below freight prepaid in the original packaging If the original packaging is not available call or write Community Warranty Service to obtain proper packaging materials or hand carry the product to the nearest Field Service Station Factory Service Center Community Warranty Service 333 East Fifth Street Chester PA 19013 4511 USA Field Service Station Call 610 876 3400 for the nearest Authorized Field Service Station For factory service please call 610 876 3400 for a Return Authorization R A number before shipping The following information must be included in the package 1 Owner s complete name daytime phone number return street address and return authorization number 2 The serial number of the product being returned and a copy of the retail sales receipt if possible 3 A complete description of the problem s experienced including a brief description of how the equipment is being used and with what brand model and output power of amplifier Upon receipt the service center will determine if the problem is covered under warranty If covered under this warranty the product will be repaired or replaced at Community s option and return
87. se problems in the room towards the middle or even the front seating areas In a real life situation the primary room resonant frequency would tend to be much lower but it s easier to illustrate the principal in a range where the graphic equalizer has more available bands Community VERIS Series Operation and Installation Manual Page 34 This additive technique can be applied to front fill loudspeakers down fill loudspeakers and any other area where multiple systems overlap in a shared acoustic space Precedence The Haas Effect The Haas Effect or precedence effect is named after Helmut Haas who first described it in his doctoral dissertation It states in part that one sound source may be as much as 10 dB greater in intensity than another but will not be identified as the location that the sound is coming from if it arrives later than the lower intensity source This effect can be used to make underbalcony overbalcony and other delayed loudspeakers acoustically disappear drawing the listener s attention to the stage rather than to the ancillary delay speaker The idea is to first find the correct delay time that will align the output of the ancillary loudspeaker with the output of the primary source then to increase the delay time of the ancillary loudspeaker to take advantage of the effect If the correct delay time is accurately identified within a range of one to two milliseconds the additional delay required to take
88. single full range VERIS loudspeaker from the ceiling It includes a rotational device a hang bracket that fastens to the top or bottom of the enclosure and a ceiling mount bracket It can be used with any full range VERIS loudspeaker Tilting Bracket Model No VB TILT The TILT bracket allows for precise angling of a VERIS loudspeaker The VB TILT is a two part rotational device that can be used to fasten one enclosure to another to fasten an enclosure to the CMKIT Ceiling Mount Kit to fasten to a yoke bracket permitting one loudspeaker to be angled in relation to another in two axes The VB TILT can be used with all full range VERIS enclosures Note Yokes are sold separately for VERIS models 12 15 32 35 A yoke is included with all VERIS 6 26 8 28 models Eyebolt Kit Model Nos MIOEYBLTKI T MGEYBLTKI T Suspend your VERIS loudspeakers safely and easily Use the 10mm M10EYBLTKIT with VERIS12 15 32 35 use the 6mm M6EYBLTKIT with the smaller VERIS6 8 26 28 Four eyebolts are included in each kit Community VERIS Series Operation and Installation Manual Page 43 TROUBLESHOOTI NG GUI DE Should you have a problem with your VERIS loudspeaker s find the symptom and follow the associated What To Do instructions below Please note that a particular symptom may have several possible causes SYMPTOM High distortion low output or no output from any or all drivers Distortion from the loudspeaker at higher volume leve
89. ssure on the crimp tool When the spade lug is tightened firmly on the barrier strip it will form a gas tight connection resistant to corrosion Be careful not to over tighten the barrier strip screws as they can sheer off under too much torque This is the recommended method of wiring for fixed installations especially those that may be exposed to inclement environmental conditions WIRING NEUTRI K TYPE CONNECTORS The following diagram shows how connections are made to a Neutrik Speakon style loudspeaker connector Terminations may be soldered or made by means of their built in screw and pressure clamp If using the pressure clamp it s important to tighten it fully then to wait about ten minutes longer is better then to tighten it again This is because copper wire flows under pressure After initially tightening the screw clamp some minutes later the screw will no longer be as tight due to the effect of the compression on the copper Typically only one cycle of tighten wait re tighten is required for a secure connection Community VERIS Series Operation and Installation Manual Page 20 Fiqure 6 NLA Tvpe Connector FROM AMPLIFIER NEUTRIK SPEAKON CONNECTOR NL4FC Note Pins 24 and 2 are not used in the VERIS loudspeaker series DANGER When wiring the amplifier s to the loudspeaker s always power down the amplifier s and disconnect their AC Mains plug s Many modern high power amplifiers can
90. st of today s products use DSP Digital Signal Processing to divide the frequency band between subwoofers and full range systems and to provide equalization protective limiting and signal delay The use of a good quality DSP processor or loudspeaker management tool as many such devices are often referred to is strongly encouraged When properly utilized a DSP processor provides numerous benefits that contribute to better quality sound and longer system life Please contact Community for up to date recommendations regarding specific types and models of available products USING PROTECTIVE LIMITERS Although VERIS loudspeaker systems are well protected against potentially abusive operating conditions by their internal DYNA TECH protection circuits the use of an active outboard limiter can add an extra measure of insurance for long term reliability Additionally an active outboard limiter can be adjusted to provide a subtler degree of driver protection precisely tailored to each user s specific needs in terms of musical styles and operating conditions A limiter is a device that detects the level of the signal that it s receiving over a given interval or time constant When the input level crosses a certain threshold for longer than a certain time period the limiter introduces some degree of gain reduction In turn the gain reduction reduces the dynamic range of the program material that reaches the amplifier Limiters an
91. surfaces If located at the junction of three walls such as on the floor or ceiling in a corner called Eighth Space a given subwoofer will produce a full 9dB more output than if that same subwoofer is located in Free Space such as when suspended between the middle of a floor and ceiling If located at the junction of two walls Quarter Space the subwoofer will produce 6dB more output than if suspended in Free Space Located on a single wall such as the floor or ceiling the increase is 3dB Free Power What could be better See Figure 8 for additional clarification Figure 8 Effect of Boundary Surfaces on Power Output When choosing subwoofer location s be careful however not to sacrifice sonic quality for sheer power If the available wall or corner location results in the subwoofer being located behind or too close to one or more open microphones early feedback is likely to occur If the wall or corner location is too far away from the full range loudspeaker s such a location may result in the subwoofer being drastically out of time sync with one or more of the full range speakers Sometimes the sound quality of a wall or corner placement is not desirable simply due to the room s acoustical properties Keep in mind that when wall and corner locations are appropriate for use they ll provide a tremendous increase in power output but they may not always be the best choice for sound quality
92. tal splayed arrays vertical splayed arrays as well as exploded clusters and distributed configurations Rigging kits are available from the factory as standard items DYNA TECH DRI VER PROTECTI ON SYSTEM All VERIS Series loudspeakers employ Community s advanced technology DYNA TECH driver protection system Functioning as a multi stage limiter DYNA TECH circuitry provides precise and repeatable protection by reducing excessive power to the drivers under abusive conditions The first stage of limiting is designed to protect against short term excess power applied to the high frequency driver s in the system This circuit utilizes an HPCCR High Positive Current Coefficient Resistor in series with the driver s The HPCCR increases resistance as the current flowing through it increases As its resistance rises above nominal the heating of the element provides RMS conversion The result is an RMS limiter with a ratio that varies according to the demands of the program material The second stage of limiting protects against excessive power levels to all drivers in the system This stage is based on an electro mechanical relay driven through a voltage sensing circuit The relay engages at a pre determined voltage corresponding to a power level that would otherwise cause driver damage When engaged the relay introduces a bank of high wattage resistors in series with the drivers These resistors cause a voltage drop to the drivers thereby reducing
93. the most from your use of VERIS loudspeakers in portable applications and fixed installations We call these C TI PS short for COMMUNITY TIPS or COOL TIPS we ll let you decide These tips originate from Community staff members as well as from installers and end users We welcome any C TIPS that you may want to share with us and we ll acknowledge you as the source if we print them in future user s manuals Community VERIS Series Operation and Installation Manual Page 5 PRECAUTI ONS amp SAFETY CONSI DERATI ONS English The loudspeakers described in this manual are designed and intended to be flown or suspended for maximum acoustical performance using a variety of rigging hardware means and methods It is essential that all installation work involving the suspension of these loudspeaker products be performed by competent knowledgeable persons who understand safe rigging practices Severe injury and or loss of life may occur if these products are improperly installed Please read the section on rigging for additional information Francais Les haut parleurs d crits dans ce manuel sont congus et sont projet s pour tre vol ou suspendu pour l ex cution acoustique maximum utilisant une assortiment d quiper mat riel les moyens et les m thodes C est essentiel que tout travail d installation ait impliqu la suspension de ces produits d haut parleur est ex cut e par les personnes comp tentes et entrain es qui comprenn
94. then may or may not necessarily be installed in a conduit Wire and cable manufacturers offer multi conductor cables with 30 or more high current conductors covered with a variety of jacket types Jackets may be made of PVC rubber neoprene and other materials depending on the intended conditions of use Generally speaking the wires and cables that power loudspeakers do not need to be twisted into pairs though there is some benefit to doing so A twisted pair of conductors has the effect of cancelling electro magnetic radiation thereby reducing mutual induction among circuits that share the same physical space such as a cable tray or conduit along with canceling the crosstalk that might otherwise result Twisted pairs are commonly used for balanced line signal and microphone cables in which the nominal voltages are very low and the input impedance of the load is typically quite high gt 10K ohms Under such conditions the use of a twisted pair is essential to reduce crosstalk among adjacent cables The twisting insures that the differential amplifier in a balanced line receiver will see identical phase and amplitude of any extraneous Electro Magnetic Interference EMI induced in the cable on both polarities thereby allowing the EMI to be differentially cancelled In contrast however loudspeakers have input impedances that are quite low and operate on much higher voltages The potential of inducing an audible signal from adjacent wiring
95. udspeaker If the wiring is OK remove the input panel and check all solder joints on the crossover and the wiring to the drivers Visually inspect solder joints as cold joints may only malfunction under high current Repair as needed If the power rating of the amplifier is too low it will clip at higher volume levels Reduce the volume level or use a more powerful amplifier Using a sine wave oscillator or wide range program at moderate levels listen to each driver to isolate the problem Replace as needed Test and replace as needed Check wiring and correct as needed Test and replace as needed Test and replace as needed Check to make sure that the audio signal to the amplifier is high enough to drive it properly Check all volume level controls and gain switches in the system including the amplifier input attenuator Make sure the signal and input wire connections inside all system connectors are not shorted or open Even one small wire strand shorting the signal terminals together anywhere in the system can cause this problem Check that amplifier is turned on and that loudspeaker is properly connected to the amplifier Check that all the audio equipment in the signal chain is powered on and that all gain controls are in the proper position Make sure the front grille screws are securely seated and that any external mounting hardware is tightened or secured from vibrating Using a sine wave oscillator or wid
96. uine Nicopress tools come equipped with a calibration gauge to insure that the tool is performing properly on every fitting over time 7 Shackles Only industrial grade load rated shackles should be used to attach wire rope or fabric slings to hang points The use of rapid links Quicklinks clip locks and other non rated hardware items should absolutely be avoided Shackles and other high strength forged components must never be dropped onto hard surfaces such as concrete If a shackle is dropped more than a foot onto concrete discard it The impact of the fall could cause the metal to crystallize and fatigue under strain leading to early failure 8 Eyebolts Eyebolts are often used to suspend single loudspeakers arrays and clusters of loudspeakers Some of Community s VERIS rigging accessories are designed to utilize eyebolts Eyebolts are available in several styles and materials Some of the most common are e Formed steel plain eyebolts e Forged steel plain eyebolts e Forged steel shoulder eyebolts sometimes called machine eyebolts For loudspeaker rigging only rated forged steel shoulder eyebolts purchased from a reputable manufacturer should be utilized Community offers this style of eyebolt at a reasonable cost Community VERIS Series Operation and Installation Manual Page 39 The SWL or WLL rating of any eyebolt is based on a straight line pull If the load angle varies from that of a straight line the load
97. usic track More cuts at 125 and 250 again help it to sound less bass heavy but we can clearly see we re chopping up the response curve Maybe these minimalist guys are right too much EQ really chops things up Too bad there s not a filter on this thing that produces the inverse of the whole response shape Let s try moving the mic to the mix position That s seems to be a good idea Put the mic where the sound operator is Wow Now there s a whole new picture The holes from the graphic can barely be seen anymore Instead there s a big bump at 362 Hz and again at 725 Hz and the whole low end is even more accentuated We try using the graphic to flatten the response We try for a long time but no combination of filters will flatten the low end Pulling down 315 takes part of the 362 Hz bump out but not all of it Pulling down 400 just puts a hole above the bump at 362 and makes the bump look even bigger than before Same problem at 725 Hz This isn t working It must be true you can t really EQ a room Someone says Let s try this parametric equalizer instead You re ready to do anything After setting it up you ve found it has a shelving filter with an adjustable turnover frequency You try cutting it 8 dB and the whole low end quickly flattens except for the 362 Hz bump But the slope s not quite right There s still a quick rise around 900 You move the turnover frequency up to 900 Like magic the whole low end is now flat e
98. xcept for the bumps at 362 and 725 Engaging a bandpass filter you dial up a peak of 4 dB making the bandwidth quite narrow In a few seconds you ve easily centered the peak squarely on the bump at 362 Hz Now you cut it and fiddle with the Q In a few more seconds the bump is gone No trace You repeat the process at 725 Again it s gone without a trace But this has to play havoc with the phase doesn t it Something has to be wrong It s too easy The guy who owns the FFT tells you that because you re looking at the transfer function of the loudspeaker in the room you can also see the phase response if you want to He pushes a few buttons and there on the screen is a phase response trace along with the frequency response trace It looks remarkably flat from about 200 Hz up to 1 kHz or so You bypass the equalizer and the bumps are back along with the big rise in low end Remarkably the phase trace now shows two wiggles dead centered on the 362 and 725 bumps and an overall drop that looks like the inverse of the low frequency rise You feel a little like Alice in Wonderland When the equalizer was switched in the filters actually 3 FFT is an acronym standing for Fast Fourier Transform which is based on the Discrete Fourier Transform a mathematical algorithm defined by French mathematician Jean Fourier FFT measurement instruments are vitally important to the study of sound and vibration No matter what technique you use you can t of c
99. y drive low impedance loads though usually 4 ohms and higher is not a problem Very low impedance loads may cause the amplifier to clip prematurely overheat shutdown or fail altogether due to internal device damage Even when an amplifier is quite stable driving a low impedance load cable loss will be greater than with moderate impedance loads damping factor will be reduced and if the amplifier were to fail a larger portion of the sound system is likely to be taken off line due to the fact that a low impedance load implies a larger number of loudspeakers being powered from a common amplifier C TI P Keeping the loads at 4 ohms or higher will lengthen the life of your amplifier s and improve the reliability and overall sound quality of the system Choosing Loudspeaker Wire Wire and cable is used to transfer power between the amplifier and the loudspeaker Wire and cable can be purchased with copper and aluminum conductors for loudspeakers only copper conductors should be utilized The construction conductor type and insulation material of wire and cable vary widely Wire can be purchased with solid core construction stranded core construction and densely stranded construction Cables are typically available only as stranded or densely stranded Speakers may be driven through individual conductors bundled together and pulled through conduit or through a cable made up of a number of conductors covered with an overall jacket which
100. y must always be used in strict accordance with the manufacturer s instructions Such instructions specify the diameter and depth of the hole the composition of the concrete permissible spacing of the anchors and the torque of the bolts As a general rule they should only be used for sheer loads not tension loads 11 Liability When you install a loudspeaker that is mounted or suspended over people s heads it is your responsibility and yours alone to insure that the installation is performed in a safe manner Never take the word of someone who tells you That beam is safe to drill into or This point can handle the load or I ll take responsibility if anything happens To paraphrase Harry Donovan from his excellent book on safe rigging practices entitled Entertainment Rigging How is it going to sound to the jury at your manslaughter trial when you use such statements by others as your defense Never do anything you aren t 100 sure is safe If a manufactured product looks poorly designed and built it probably is poorly designed and built If you aren t absolutely sure where the wire rope came from or how strong it is don t touch it If the bolt looks too flimsy to hold the load it probably is too flimsy Always use your best judgment just as you do when driving at high speeds in traffic The life you save may be your own Community VERIS Series Operation and Installation Manual Page 41 VERI S MOUNTI NG BRACKETS AND ACCESSO

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