Home

User Manual - A.C. Entertainment Technologies

1. AZ Vv a A VI A i 4 f VR TN f i V D i I N i I No No No MN Il M VW d WI WI M AT YN iw NI Ne Wit M ELECTRONICS All the TT line arrays electronic is in a strong separate extruded aluminum housing From the right side of the amplification module are available Neutrik Powercon input and output on off switch E and protected ports for the ventilation fan From the left side of the SSS Ep i amplification module are available all the inputs and controls The no A amplification module is connected to the main cabinet in 4 points E with M6 metric screws and easily removable INPUTS The TT line arrays input section offers XLR input XLR output for daisy chaining and sensitivity control 00 2 dB A set of 5 switch is used for parameters and configuration control air absorption cluster size low frequencies cut off A data port is available for firmware upgrade and special applications SIGNAL PROCESSING Each TT line arrays cabinet features a last generation 32 bit floating point DSP for audio processing and a separate micro processor for general system management Analog digital conversions are operated from high resolution 24 bit 96 kHz
2. HOW LINE ARRAYS WORK Line arrays can provide increased gain compared to other methods of arranging loudspeaker elements An understanding of how specific radiating devices operate allows the creation of effective line source arrays In the realm of loudspeaker systems a line source array is a group of similar sized sound radiating sources that provide increased directivity at various frequencies This directivity known as the Line Array summation effect can be predicted based on known characteristics of the individual sources and the size and height of the array along with center to center spacing of the acoustic sources Line arrays achieve directivity through constructive and destructive interference The loudspeaker s directivity varies with frequency When the wavelengths being reproduced are larger than the driver at low frequencies it is omni directional as the frequency increases and the wavelength is comparable to the size of the driver directivity narrows For example stacking two loudspeakers one atop the other and driving both with the same signal results in a different radiation pattern At common points on axis there is constructive interference and sound pressure increases by 6 dB relative to a single unit At other points off axis path length differences produce cancellation resulting in a lower sound pressure level In fact if you drive both units with a sine wave there will be points where the cancellation is complete This is
3. ara 2 Er r V y y t e hi r H i x p ha x THE TTL31 A 8 NEO WOOFERS The MB8N252 is a high output high power handling mid bass designed to provide a very tight and fast response in hybrid reflex hornloading designs Extended response down to 60 Hz inside outside voice coil M roll surround The voice coil size is 2 5 THE TTL33 A 8 NEO MIDRANGE The MR8N251 is a high efficiency low distortion midrange specially designed to provide superior sound pressure level in a very compact size The total weight is reduced to less than half of a comparable ceramic midrange thanks to an incredibly powerful neodymium magnet assembly Every detail of this speaker has been optimised to offer maximum linearity and perfect control to the midrange and midhigh frequencies The voice coil size is 2 5 In the TTL33 A application the MR8N251 is frontally horn loaded and equipped with a lightweight aluminum back can THE TTL33 A TTL31 A 1 NEO COMPRESSION DRIVER The ND1411 MT compression driver is a design conceived for array applications very high output high power handling the overall size is very small for the minimum spacing Neodymium magnet titanium dome mylar surround radial phase plug The voice coil size is 36 mm The TTL33 A TTL31 A is equipped with 3 ND1411 MT in horn loaded configuration HIGH FREQUENCY HORN The high frequency horn is one of the key parts of the line array One of the biggest problems in
4. destructive interference sometimes referred to as combing A typical line array comprises a line of loudspeakers carefully spaced so that constructive interference occurs on axis of the array and destructive interference combing is aimed to the sides While combing has traditionally been considered undesirable line arrays use combing to positive effect to control the directivity For high trequencies TTL33 A TTL31 A uses very precise Constant Q horns which provide a consistent beamwidth of coverage in both the vertical and horizontal planes By properly aligning the acoustic sources and observing the wavelength related spacing the combined output takes on the characteristics of a coherent wave front within the pass band of the high trequency devices In the vertical pattern RCF wave guide horn loading provides narrow coverage in order to minimize destructive interference between adjacent elements and promote coupling to throw longer distances As more elements are arrayed in a vertical column they project mid and high frequency energy more effectively through coupling The amount of energy can then be controlled using the relative splay between the elements Curving a line array can aid in covering a broader vertical area while narrow angles provide a longer throw and coverage which more closely matches that of the mid low frequencies The horizontal directivity of a line source array will typically be the same as that of one
5. expressed in terms of frequency rather than wavelength Two useful forms are 700 I in meters f in Hz y Lin feet f in Hz 2300 SYSTEM CONFIGURATIONS In practice not all line arrays can be straight lines i e depending on the application and needs it may be necessary to curve the array in order to achieve sufficient coverage throughout the audience areas For this reason each box that makes up the line array must incorporate a rigging system that allows aiming in the vertical plane It is important to note that the rigging system as well as being integral to the units needs to al low for hinging at the front of the box so that the separation between the speakers remains the same hinging at the back of speakers would increase the vertical spacing which works against line array theory Thus curved systems are frequently used 35 CURVED ARRAY A curved array is comprised of radiating elements arranged along a segment of a circle It generally provides a wider directivity response than a straight line array At high frequency it provides a polar pattern corresponding to the included angle of the arc There exist limitations with respect to the maximum allowable splay angles to comply with the theory One of the conditions is specified on the following sentences a for curved arrays the vertical splay angles must vary inversely with the distance to the listening location l e for the farthest positions the splay ang
6. important benefit of the TTL33 A TTL31 A technology is that by inherently maintaining the sonic character throughout the audience user equalization will affect the frequency balance in all areas of the audience in the same way PHYSICAL SET UP There are 8 splay angles engineered into the rigging for the TTL33 A TTL31 As These are set by changing the splay between the rear of the enclosures rather than the front This means that the fronts of all enclosures are always tight packed The support of using RCF Shape Designer software greatly simplifies the physical set up USING SUBWOOFERS GENERAL CONSIDERATIONS Although the impressive low frequency performance of TTL33 A arrays allows them to be used without subwoofers for some events subwoofers will normally be used for live musical performances The recommended subwoofer are TTS28 A and TTS18 A specifically designed to complement TTL33 A line arrays NOTE Bass performance is often highly program or venue dependent as well as subjective as to quantity and quality For this reason the type quantity and disposition of subwoofers may vary considerably with the application The quantity 48 recommendations below are for general purposes providing a balanced system for most music applications Quantities may need to be adjusted up or down for specific situations TTS18 A AND TTS28 A SUBWOOFERS TTS18 A and TTS28 A subwoofers are designed to complement the TTL33 A loudspeakers to both exten
7. line array designs is the difference in path lengths from driver to driver in high frequencies this is cause of hf comb filtering and cancellation To avoid this problem many array designs present in front of the driver complex acoustic chambers to equalise different paths sound chambers reflective chambers wawequides Those devices are usually creating impulse response problems and acoustic loads that are changing with the frequency In the TTL33 A TTL31 A horn design thanks to the very small overall diameter of the drivers the spacing between ND141 1 MT centres of emission in the array application is only 70 mm Thanks to this small spacing it has been possible to equalise the different paths with a simple straight horn with a very simple design that avoids reflections The result is a very even frequency response a coherent wave source a very natural and transparent sound The TTL33 A TTL31 A high frequency horn is designed to create a continuous and coherent line from cabinet to cabinet TTL55 A LOW SECTION At low frequency vertical line array pattern control is reached by the constructive interference of the low frequency sources on line array axis and destructive interference on line array off axis This is true over a frequency range where sources are omni directional for a 12inch below 400Hz and its separation is comparable or lower than signal wave length reproduced TTL55 A vertical 12inch separation is 380mm this
8. of the single elements within the array and is independent of both the number of arrayed enclosures and the vertical configuration of the array In the horizontal pattern of the array RCF wave guide horns work to produce a wide 100 degree coverage for TTL33 A TTL31 A Due to the coplanar symmetric arrangement of components the horizontal coverage is symmetric with respect to the 0 axis RCF wave guide horn 33 0 between adjacent enclosures 15 between adjacent enclosures This 100 coverage angle also defines the recommended limit for the relative angle between TTL33 A TTL31 A arrays for example when main L R FOH TTL33 A TTL31 A arrays are oriented at zero degrees offstage LL RR arrays can be oriented at up to 100 relative to the main L R arrays while maintaining a 6 7 metre separation between arrays in order to maximize overall system coverage while reducing the audible effects of interference For the mid to low frequencies line arrays must be coupled together to narrow their vertical coverage and project mid and low energy to the far field The directional control of the array is achieved when the length of the array is similar or larger than the wavelength of the frequencies being reproduced by the array As frequencies get lower and wavelengths get longer the number of cabinets has a critical effect but the splay angle between cabinets has little effect since the to tal length is not modified substantially The number of a
9. people to pass under the system during the installation process e Never leave the system unattended during the installation process e Never install the system over areas of public access e Never attach other loads to the array system e Never climb the system during or after the installation e Never expose the system to extra loads created from the wind or snow R WARNING e The system must be rigged in accordance with the laws and regulations of the Country where the system is used It is responsibility of the owner or rigger to make sure that the system is properly rigged in accordance with Country and local laws and regulations e Always check that all the parts of the rigging system that are not provided from RCF are appropriate for the application approved certified and marked properly rated in perfect condition e Each cabinet support the full load of the part of the system below It is very important that each single cabinet of the system is properly checked RCF SHAPE DESIGNER SOFTWARE AND SAFETY FACTOR The suspension system is designed to have a proper safety factor configuration dependent Using the RCF Shape Designer software it is very easy to understand safety factors and limits for each specific configuration To better com prehend in which safety range the mechanics are working a simple introduction is needed TT line arrays mechanics are built with certified UNI EN 10025 95 S 235 JR Steel RCF predic
10. way e the power supply cable has been damaged e objects or liquids have got into the unit e the amplifier has been subject to heavy impact 9 When the amplifier is not to be used for long periods of time switch it off and disconnect the power cable 10 If the amplifier begins to emit any strange odours or smoke switch it off immediately and disconnect the power supply cable 11 Do not connect this product to any equipment or accessories not specified For suspended installation only use the dedicated anchoring points and do not try to hang this product using HANDLES or elements that are unsuitable or not specific for this purpose Also check the suitability of the support surface to which the product is anchored wall ceiling structure etc and the components used for attachment screw anchors screws brackets not supplied by RCF etc which must guarantee the security of the system installation over time also considering for example the mechanical vibrations normally generated by the transducer To prevent the risk of falling equipment do not stack multiple units of this product unless this possibility is specified in the instruction manual 12 RCF Spa strongly recommends this product is installed by professional qualified installers or specialised firms who can ensure correct installation and certify it according to the regulations in force The entire audio system must comply with the current standards and regulations reg
11. with Windows 3 x Windows 95 or Macintosh operating systems INTRODUCTION Use the RCF Shape Designer for designing TTL33 A arrays The RCF Shape Designer s primary function is to determine the configuration that will provide the best vertical performance for a given application Various venue dimensions are entered that allow the RCF Shape Designer to calculate the resultant array performance USING RCF SHAPE DESIGNER SOFTWARE Once you have installed RCF Shape Designer it will be visible as a shortcut in All Programs via your Windows Start button USLE LEE RITA 1ST DE RL Te DEFINIT TON TONO AND THESE or a pe ce 40 Filling the blank tabs it s possible to start the program Bat Jr ad Bi cnm An ipun ea O aa feof Pau T E XT Bug muf sir ensf me eer ENTERING VENUE DATA For best results planes should be used as follows Floor is used to simulate the main floor area from the stage to a rear bleacher or boundary Plane 1 is used to simulate any audience continuation behind Floor e g a rear bleacher from the end of the main floor to furthest and highest seat below Plane 2 Plane 2 is used to simulate the furthest highest audience area Example audience modelling Enter the height length and elevation of up to three planes EE PLANE 2 mid T F rad E For all planes Length refers to the horizontal length of that plane For all planes Hei
12. 1 All the precautions in particular the safety ones must be read with special attention as they provide important informa tion 2 The power supply voltage of this equipment is sufficiently high to involve a risk of electrocution therefore never install or connect the product with the power supply switched on 3 Before powering up the amplifier make sure that all the connections have been made correctly and that the voltage of your power mains corresponds to the voltage shown on the rating plate on the unit if it does not please contact your RCF dealer 4 The metallic parts of the unit are earthed by means of the power cable In the event that the current outlet used for power does not provide the earth connection contact a qualified electrician to earth the equipment using the dedicated terminal 5 To protect the power cable from damage make sure that it is positioned so that it cannot be stepped on or crushed by objects 6 To prevent the risk of electric shock never open the amplifier There are no parts on the inside that the user needs to access 7 Make sure that no objects or liquids can get into the amplifier as this may cause a short circuit 8 Never attempt to carry out any operations modifications or repairs that are not expressly described in this manual Contact your authorized service centre or qualified personnel should any of the following occur e the amplifier does not function or functions in an anomalous
13. 2 The total current requirement is obtained multiplying the single current requirement by the number of modules To obtain the best performances make sure that the total burst current requirement of the system doesn t create a significant voltage drop on the cables GROUNDING Make sure that all the system is properly grounded All the grounding points shall be connected to the same ground node This will improve reducing hums in the audio system TIL33 A TTL31 A AC CABLES DAISY CHAINS Each TTL33 A TTL31 A module is provided with a Powercon outlet to daisy chain other modules The maximum number of modules that is possible to daisy chain is 230 VOLT 6 modules total 115 VOLT 3 modules total A WARNING RISK OF FIRE A superior number of modules in daisy chain will exceed the Powercon connector maximum ratings and create a potentially dangerous situation POWERING FROM THREE PHASE When the TT line arrays system is powered from a three phase power distribution it is very important to keep a good balance in the load of each phase of the AC power It is very important to include subwoofers and satellites in power distribution calculation both subwoofers and satellites shall be distributed between the three phases 11 4 ES e 9 ud z THE TTL SYSTEM la AUDIO CONNECTIONS AND CABLING The TT line arrays input panel presents balanced XLR input output SIGNAL CABLES DAISY CHAINS Audio signal can be daisy chained u
14. 400 Hz 1 800 Hz TRANSDUCERS Low frequency 2 x 8 midbass neo 64 mm voice coil Mid frequency 1x8 midrange neo 64 mm voice coil High frequency 3 x 1 compression driver AMPLIFIER Total power supply switching 750 Watt Low section D 500 Watt Mid section D 500 Watt High section D 250 Watt CONNECTIONS XLR male female Powercon male female Signal Input Output Power Input Output CONFIGURATION CONTROLS Array size control 2 3 4 6 7 9 10 16 Distance control Near Mid Long Full range high pass Volume Control DSP PROCESSOR e 32 bits 96 KHz sampling floating point e 3 way equalisation crossover filtering fast limiter RMS limiter e array size configuration set up e distance correction set up e low filtering set up MECHANICAL Size 760 x 300 x 450 mm Weight 33 Kg 51 TTL31 A ACOUSTICAL Operating frequ range 60 20 000 Hz Max SPL 132 dB Horizontal Coverage 100 Vertical Coverage 15 depending on configuration Crossover points 1 600 Hz TRANSDUCERS Low frequency 8 neo 64 mm voice coil Mid trequency X High frequency 3x 1 0 neo 37 mm voice coil AMPLIFIER Total power supply switching 750 Watt Low section D 500 Watt Mid section X High section D 250 Watt CONNECTIONS Signal Input Output XLR male female Power Input Output Powercon male female CONFIGURATION CONTROLS Array size control 2 3 4 6 7 9 10 16 Distance control Near Mid Lono Full range high pa
15. ACKING FRONT STACKING TOP POINTS POINT REAR BOTTOM For ground stacking are necessary optional STCK BAR TTL33A rigging frames and additional quick release pins DES MODULES DE SUBWOOFER PENDRE DES HAUT PARLEURS CATION CONNECTING SUBWOOFER MODULES NDING SPEAKERS WARNING ec o Lu m e 2 ec wi gt i z EMPLOYER SEULEMENT POUR NE JAMAIS EMPLOYER POU a a lt ivi Z x z E n a o UL 5 zZ o e Lu a 2 Lu e 2 figure STCK BAR TTL33A for connecting TTL33A figure STCK BAR TTL33A for connecting subs 28 TTL33A loudspeakers can be stacked by themselves on the FLY BAR TTL33A or can be placed on top of TT subwoofers with the same FLY BAR TTL33A fitted with the optional STCK BAR TTL33A rigging frames pinned to the grid Secure sub enclosures with the optional STCK BAR TTL33A rigging frames for subs using 2 quick lock pins for each bracket Reverse FLY BAR TTL33A front bracket and use the optional STCK BAR TTL33A rigging frames for subs for securing the frame to subs enclosures Connect the optional STCK BAR TTL33A rigging frames for subs and the FLY BAR TTL33A front bracket using 2 quick lock pins for each bracket The STCK BAR TTL33A link adds a fixed amount of up or downtilt to ground stacked TTL33A loudspeakers with additional 19 degrees of adjustment possible from 11 to 8 29 Use the optional STCK BAR TTL33A rigging frames for satellite enclosures for securi
16. FRONT STAGE OF HOUSE Time alignement of a horizontal array 38 ARRAY SYSTEMS DESIGN TTL33 A TTL31 A allow users to choose from different face to face angle adjustments to create arrays with varying curvature Thus designers can create arrays custom tailored to each venue s profile The basic approach to array design dependent on three factors e Number of Array Elements e Vertical Splay Angles e Horizontal Coverage Determining the number of elements to use is critical the number of elements greatly affects the SPL available from the system as well as the uniformity of coverage in both SPL and frequency response The number of elements profoundly effects the directivity at lower frequencies The next easy equation works as an approximation for flat listening planes Coverage x 10n m Coverage distance required x metres 6n N Number of boxes n TTL33 A TTL31 A enclosures Changing the splay angles between cabinets has a significant impact on vertical coverage for the high frequencies with the result that narrower vertical splay angles produce a higher Q vertical beamwidth while wider splay lowers the Q at high frequencies In general the splay angles do not affect the vertical coverage at lower frequencies The curved array system design can be summarized as e flat front TTL33 A TTL31 A s for long throw sections e increase curvature as distance decreases e add more enclosures for more output This approach focus
17. For the same me lam reason gain differences are not recommended for line arrays since om adjusting various zones with an overall amplitude control for each results in decrease of Low frequency headroom and directionality In any case line arrays generally need a correction to compensate a for energy sum on lows iL In the next figure is shown the equalization that corresponds to is DSP settings for cluster size set up referring to different number LAN M OS ME AN ae of speakers from 2 3 up to 10 Increasing the number of cabinets response curves are decreased in order to compensate the low frequency section mutual coupling AMPLIFIER GAIN SETTINGS In order to let the system work properly all amplifiers must be set to the same gain Among other things equal amplifier gains are required to maintain array coherence throughout the venue This does not only mean the same input sensitivity but the same input to output voltage gain Do not selectively boost or attenuate loudspeaker levels at the amplifiers in order to achieve consistent SPL at various distances This is achieved by adjusting the array curvature USER EQUALIZATION Normally the only user adjustable signal processing needed is straightforward 1 3 octave equalization This is to correct for frequency response anomalies specific to a particular acoustical situation type of program or simply to satisfy a particular mixing engineer s taste in frequency balance An
18. ICK LOCK PIN HOLE Front mounting to be used to lock the front bracket before installation REAR BAR HOLE Front mounting FRONT STACKING POINT REAR STACKING POINT UPPER POSITION REAR STACKING POINT LOWER POSITION FRONT BRACKET TRANSPORT POSITION HOLE CORNER DOUBLE MOTOR PICK UP POINT CORNER DOUBLE MOTOR PICK UP POINT 10 9 CENTRAL PICK UP POINTS The TTL31 A system must be suspended using the RCF TTL31 A fly bar FRONT BRACKETS FRONT AND REAR MOUNTING Front brackets in transport position Tilting the front brackets 23 THE 3 POSSIBLE PICK UP SYSTEMS FOR THE TTL33 A TTL31 A FLY BAR ARE THE FOLLOWING BN SINGLE MOTOR CENTRAL PICK UP DOUBLE MOTOR CENTRAL FRONT BACK PICK UP DOUBLE MOTOR 4 CORNERS PICK UP e Always check that the rigging motors rating exceed the total load to be suspended e Always check that the connection hoist rating exceed the total load to be suspended The connection hoist must be connected using the flat part in contact to the bar and the round part connected to the motor hoist 24 TTL33 A TTL31 A RIGGING PROCEDURE RIGGING THE SYSTEM FOLLOW THE PROCEDURE H RIGGING CHAIN HOIST S CERTIFIED SHACKLE F FLY BAR 1 Connect the fly bar F to the chain hoist H 0 motors using a certified shackle Secure the shackle to prevent un screwing following the shackle supplier instructions and warnings 2 Connect the second pin on the front bracket to make sure that th
19. ICKUP FIXING HOLES FRONT BRACKETS FRONT AND REAR MOUNTING 1 Front brackets in transport position 2 Remove the side pins and tilt the front bracket 3 Fix the front brackets in vertical position locking the pin in position 2 4 Fit the picip in the middle of the two central brackets 5 The pickup is asymmetric and can be fit in two positions A and B A position brings the shackle towards the front B position allows an intermediate step using the same fixing holes 6 Move the pickup bracket in the position suggested by RCF Shape Designer 7 Fix the pickup bracket with the two pins on the bracket s lanyard to lock the pickup 8 Check that all the pins are secured and locked 20 9 Put the first speaker under the flybar 10 Fit the front flybar brackets in the speaker s front housing and fix it with the quicklock pin supplied with the speaker 11 Tilt the speaker s rear bracket in the flybar housing and fix it with the quick lock pin supplied with the flybar 12 Check that the front and rear pins are secured and locked 13 Go on linking the other speakers Fit the front bracket and fix i
20. L R coverage for the typical 12 15 metre L R array separation that occurs in theatres 37 MULTIPLE ARRAY gt 100 horizontal coverage When the horizontal coverage of a TTL33 A TTL31 A array 100 nominal is not sufficient it is not recommended to place a second array directly beside the first one The best approach is to utilize a second array which is focused on another portion of the audience typically at 60 100 relative to the first array and spaced at least 6 7 meters approximately 20 ft from the first array By focussing main and offstage fill arrays at different panning angles audible comb filtering interaction is lessened since the overlap region between the two arrays is reduced The main L R FOH arrays are normally physically larger than the offstage side fill arrays and act as the reference for time alignment Typically a side fill array is delayed with respect to the FOH array To geometrically improve time alignment in the overlap region between the main and offstage arrays the location of the offstage array should follow the arc of a circle with the radius of the circle at upstage centre The offstage fill system should be time aligned towards the direction where both array produce equal level Time align ment of a horizontal array e The delay time value At is equivalent p f to the physical offset Ax divided by the NE speed of sound i e 343 m s Nm Ape Pg U sound i s qi MAIN ARRAY si
21. L31 A system with only at 2R surface area increase 2 times gt 3 dB only a small difference in SPL due to the system s unconventional attenuation attenuation rate 34 DISTANCE TO THE FAR FIELD OF A LINE ARRAY from AES Convention paper Presented at the 110th Convention 2001 May 12 15 Amsterdam The analysis of line arrays relies on a far field assumption that is that the distance to the point of observation P is large compared to the length of the array The far field is characterized by sound pressure level decreasing at 6dB for every doubling of distance In the near field the sound pressure level undulates and decreases nominally at 3dB per doubling of distance The transition point can be estimated if we set as a criterion that the far field is reached when the distance to P from the centre point of a line array is within a quarter wavelength of the distance to P from the endpoint of the array Geometric construction for far field distance Referring to the previous figure the far field is obtained when Mall ibra 4 where r is the distance to P from the centre point and r is the distance from the endpoint Solving for r where is the length of the array Rewriting the distance to the far field is 2 pi Ja 2 8 2 the square of the array length and inversely proportional to wavelength For most applications the second term can be dropped For convenience the far field equation for a line array can also be
22. N POWER LED This led is ON when the system is connected to the AC power source and the main on off switch is in position 1 8 GREEN SIGNAL LED This led is ON when the audio input signal is superior to 20 dB When there is no input signal the led is flashing 9 YELLOW STATUS LED This LED is flashing during the bootstrap procedure and in case of communication problems with the DSP processor 10 RED ORANGE LIMITER LED This led is ON when the limiter circuit is active to prevent output distortion or damage of the speaker ORANGE Soft limiter circuit When the LED is flashing ORANGE one of the power amplifiers reaches the maximum output for short periods of time and the working condition can be considered normal RED Hard limiter When the LED is flashing RED following the signal one of the power amplifiers reaches the maximum output for longer periods of time When the LED is blinking RED one of the RMS limiter circuit is active in order to prevent damage to one of the transducers or power amplifiers Always avoid operating conditions where the System works for long periods of time with the RED LED flashing or blinking 11 DATA INPUT This port is used to update DSP firmware DSP presets microprocessor firmware 5 GENERAL RIGGING WARNINGS AND SAFETY PRECAUTIONS e Suspending loads should be done with extreme caution e When deployi tem al tecti RIGG N G Ie aa ae nee alWays wear protective TH EF SYSTE M e Never allow
23. OWNER MANUAL TTL31 A TTL33 A LINE ARRAY MODULES TTL55 A T CONTENTS 1 INTRODUCTION 2 GENERAL SAFETY INSTRUCTION AND WARNINGS 3 POWER REQUIREMENTS AND SET UP 4 THE TTL SYSTEM 2 RIGGING THE SYSTEM 6 SOUND DESIGN 1 MAINTENANCE PROCEDURES 8 TECHNICAL SPECIFICATIONS TRANSDUCERS TECHNOLOGY ELECTRONICS CABINET AND MECHANICS SAFETY PRECAUTIONS GENERAL OPERATING PRECAUTIONS VOLTAGE CURRENT GROUNDING AC CABLES DAISY CHAINS POWERING FROM THREE PHASE AUDIO CONNECTIONS AND CABLING SIGNAL CABLE DAISY CHAINS INPUT PANEL LEDS GENERAL RIGGING WARNINGS AND SAFETY PRECAUTIONS RCF SHAPE DESIGNER SOFTWARE AND SAFETY FACTOR RIGGING SYSTEM FLY BAR SYSTEM RIGGING PROCEDURE TTL33 A GROUND STACKING RCF TTL33 A KART HOW LINE ARRAYS WORK DISTANCE TO THE FAR FIELD OF A LINE ARRAY SYSTEM CONFIGURATION ARRAY SYSTEM DESIGN RCF SHAPE DESIGNER SOFTWARE CLIMATIC EFFECTS AMPLIFIER GAIN SETTINGS USING SUBWOOFERS PARTS INSPECTION CHECK LIST 1 The TT line arrays are the active line array module z of RCF TT family The TT line arrays are a full range wide di ion li dules th INTRODUCTION 71555 standard in the touring and theatre sound reinforcement j e NI Z TY nn Eee A ge IZ Thanks to digital amplifiers high power neodymium transducers and well designed cabinet and mechanics the TTL33 A and TTL31 A are unique prod
24. arding electrical systems 13 Supports and trolleys The equipment should only be used on trolleys or supports where necessary that are recom mended by the manufacturer The equipment support trolley assembly must be moved with extreme caution Sudden stops excessive pushing force and uneven floors may cause the assembly to overturn 14 Hearing loss Exposure to high sound levels can cause permanent hearing loss The acoustic pressure level that leads to hearing loss is different from person to person and depends on the duration of exposure To prevent potentially dangerous exposure to high levels of acoustic pressure anyone who is exposed to these levels should use adequate protection devices When a transducer capable of producing high sound levels is being used it is therefore necessary to wear ear plugs or protective earphones See the technical specifications in the instruction manual for the maxi mum sound pressure the loudspeaker is capable of producing IMPORTANT NOTE To prevent the occurrence of noise on the cables that carry microphone signals or line signals for example 0 dB only use screened cables and avoid running them in the vicinity of e equipment that produces high intensity electromagnetic fields for example high power transformers e mains cables e lines that supply loudspeakers AX GENERAL OPERATING PRECAUTIONS e Do not obstruct the ventilation grilles of the unit Situate this product far trom any heat sour
25. are used for high frequencies long throws and short throws and low frequencies p Ap i ali HIGH FREQUENCY EQUALIZATION STRATEGIES b EL Tim For the far field air absorption plays a critical role The longer the distance the greater the attenuation at high frequencies e In this zone high frequencies generally need a correction to p compensate for energy lost over distance the correction needed is usually proportional to the distance and high frequency air absorption In the near to mid field the air absorption is not b nearly as critical in this zone high frequencies need little or no T additional correction o Rp AO WO OR In the next figure is shown the equalization that corresponds to DSP settings for near field mid field and far field 47 LOW FREQUENCY STRATEGIES f Ap Although the array can and usually should be zoned for i implementing different equalization curves for high frequencies identical equalization should be maintained in all the low frequency E E E OO filters Different low frequency equalization settings in the same B HAT array will degrade the desired coupling effect
26. ces and always ensure adequate air circulation around the ventilation grilles e Do not overload this product for extended periods of time e Never force the control elements keys knobs etc e Do not use solvents alcohol benzene or other volatile substances for cleaning the external parts of this product 3 A WARNING POWER e The TT line arrays System is designed to operate in hostile and demanding situations Nevertheless it is important to take extremely care of the AC power REQU REM ENTS supply and set up a proper power distribution e The TT line arrays System is designed to be AND SET UP GROUDED Always use a grounded connection A VOLTAGE The TT line arrays amplifier is designed to work within the following AC Voltage limits 230 Volt NOMINAL VOLTAGE minimum voltage 185 Volt maximum voltage 260 Volt 115 Volt NOMINAL VOLTAGE minimum voltage 185 Volt maximum voltage 260 Volt If the voltage goes below the minimum admitted voltage the system stops working If the voltage goes higher than the maximum admitted voltage the system can be seriously damaged To obtain the best performances from the system it is very important that the voltage drop it is as low as possible CURRENT MODEL VOLTAGE BURST 100 ms LONG TERM The following are the long term and peak HE ME EL 2n current requirement for each TTL33 A TTL31 A JTLD33 A TTL31 A 1i5Vot 904 63A MEN TTL55 A 230 Volt 17 7A 6 3AX2 TIL55 A 115 Volt 28 2A 10A X
27. chanical splay angle between cabinets achieves superior throw through better coupling to compensate for energy lost over distance The longer the throw needed the more elements needed with smaller angles at the top of the array In the near to mid field larger splay angles are used to increase vertical coverage LOW FREQUENCY COUPLING EFFECTS While wave guides provide isolated control over various mid to high trequency coverage areas the low frequency section of a TTL33A array still requires mutual coupling with equal amplitude and phase to achieve better directionality Low frequency directionality is less dependent on the array s relative splay angles and more dependent on the number of elements of the array At low frequencies the more elements in the array the longer the array the more directional the array becomes providing more SPL in this range The directional control of the array is achieved when the length of the array is similar or larger than the wavelength of the trequencies being reproduced by the array OPTIMIZING THE ARRAY Once the design number of elements and vertical splay angles has been designed using SHAPE DESIGNER software you can effectively optimize the array depending on the environment and the application by driving it using different DSP presets stored onboard Typically arrays are divided in two or three zones depending the design and size of the array To optimize and EQ the array different strategies
28. cision assembled with metric screws and threat locker The design guarantees a precise inclination of each module from 0 up to 15 in small 2 steps for TTL33 A TTL31 A and from 0 to 7 in steps of 1 for TTL55 A The system is very light and can be moved or transported from one or two people using the side handles or rear handles on the amplifier sides The suspension system is designed to have a proper safety factor configuration dependent Using the RCFShape Designer software it is very easy to understand safety factors and limits for each specific configuration 2 G EF N F R AL Before connecting using or rigging the system please read this instruction manual carefully and keep it S AFETY on hand for future reference The manual is to be considered an integral part of the product and must N STRU CTI O N accompany the system when it changes ownership as a reference for correct installation and use as well as AN D W AR N N G S for the safety precautions RCF S p A will not assume any responsibility for the incorrect installation and or use of the product A WARNING e To prevent the risk of fire or electric shock never expose this equipment to rain e The system TT line arrays should be rigged and flown by professional riggers or trained personnel under professional riggers supervision e Before rigging the system carefully read this manual A IMPORTANT NOTE Ay SAFETY PRECAUTIONS
29. converters The signal processing make use of state of the art algorithms and performs a very accurate system equalization 6 point each band 24 dB oct crossovers transducers time alignment hard limiter circuit soft clipping circuit The DSP reads the system configuration and adjust the parameters to optimise the performances related to air absorption cluster size and subwoofer filtering RCF Shape Designer software helps defining all parameters for specific projects and system designs AMPLIFIERS The TT line arrays amplification power is delivered from high accuracy high power digital amplifiers Very low distortion and very natural sound combined to minimum weight and minimum heat dissipation are the distinctive characteristics of this unique amplifier s design THE TTL55 A AMPLIFICATION SECTION FEATURES e 2x1500 watt switching power supply module e 2x1000 watt low frequency digital amplifier module e 1000 watt midrange digital amplifier module e 500 watt high frequency digital amplifier module e extra capacitor bus able to sustain the full voltage for over 100 ms burst signals The total available power supply power is 3000 watts and can be distributed to the 4 final amplifier sections Each amplifier section has a very high maximum output power capability in order to provide when necessary maximum output bursts in a specific frequency range A small fan speed controlled guarantee the air circulation inside the amplifier
30. d the low frequency response and provide more output for the upper low frequencies The TTS18 A subwoofers may either be ground stacked flown as part of a TTL33 A array or flown separately alongside a TTL33 A array A general recommendation is to use TTL33 A and TTS18 A in a ratio of one array module to one sub for outdoor applications and with respect of TTS28 A in a ratio of two array module to one sub for outdoor applications For indoor applications the suggested ratio is a half number of subs Subwoofer time alignment A correct time alignment of ground stacked subwoofers to the main flown array is necessary The signal arrival at the FoH position should be used as the reference for time alignment KI i The delay time value At is equivalent to the physical offset Ax divided by the speed of sound i e 343 m s I A HE Af 2 7 sound 49 I MAINTEINANCE PARTS INSPECTION CHECK LIST A WARNING Always check and inspect regularly and before the use all the parts of the system that are used for rigging Always replace parts that results damaged or in not perfect conditions DO NOT USE THE AFFECTED PARTS The following parts must be regularly inspected e TIL33 A TTL31 A FLY BAR visual inspection soldering inspection screws securely fixed inspection pin holes inspection using a pin e QUICK LOCK PINS visual inspection working test e FRONT BARS AND FRONT METAL CORNERS visual inspection screws securel
31. e connecting bracket is vertical 3 Connect the front bracket to the first TTL33 A TTL31 A cabinet using 2 quick lock pins 25 26 4 Reverse and connect the 2 rear bracket to the fly bar using 2 quick lock pins 5 Connect the second cabinet to the first always starting from the 2 front brackets 6 Reverse and connect the rear brackets of the second cabinet using the hole for the proper angle 7 Connect all the other cabinets following the same procedure and connecting a single cabinet each time TTL33 A TTL31 A RIGGING SYSTEM TTL33 A TTL31 A FLOWN SYSTEM A WARNING e Always make sure that each quick locking pin is properly entered in the right position and securely locked e Always make sure that rear left and right angle set up are the same e Rigging the array in any case always lock the 2 front pins at first then the 2 rear pins Un rigging the array in any case always un lock the 2 rear pins at first than the 2 front pins UN RIGGING THE SYSTEM Un rigging the system follow this instructions e remove the last cabinet un locking the 2 rear pins at first than the 2 front pins e remove all the other cabinets following the same procedure and removing a single cabinet each time e remove the fly bar from the motor o motors RIGGING OR UN RIGGING MULTIPLE CABINETS If the array is made of a small group of cabinet it is possible to rig or un rig more than one cabinet a time For example an arra
32. e to display different pages only in sequence venue e array e mechanics e processor e SPL amp report and back in order to be sure that all pages will be shown to the user including the one regarding mechanics MANUAL MODE RCF Shape Designer works in either of two basic ways AUTOMATIC MODE DEFAULT SETTING The RCF Shape Designer will select the optimum enclosure splays array aiming angle fly bar pick point and DSP preset configurations MANUAL MODE this provides a partial control over the array s configuration The enclosure splays can be increased with a progression of 2 steps for each adjacent speaker in order to maintain a spiral array configuration Then array aiming angle and fly bar pick point can be entered manually by switching on box1 grid changeable and Manual H flags ztting BC n f Angle n du 22 por fe rea xj omg E s0x14 mis ET Bar 18 e Angles manual changing 45 CLIMATIC EFFECTS When working in large venues or outdoors it s always necessary to remember that sound propagates through air and is affected by air temperature humidity and wind conan EFFECTS OF TEMPERATURE GRADIENTS ON SOUND me PROPAGATION WARM AIR If sound is propagated over large distances outdoors its behaviour ar AERA Aci may seem erratic Differences gradients in temperature above ground COOL AIR level will affect propagation as shown in next figure Refraction of sound refers to its changin
33. es more transducers mounted on long throw horns at the farthest seat gradually focusing fewer transducers as distance decreases As long as the no gap rule is maintained arrays constructed according to these principles will provide even SPL and a consistent sonic character throughout the venue without requiring complex processing This approach where the same amount of acoustic energy is spread over a larger or smaller vertical angle depending on required throw typically have the following objectives e even horizontal and vertical coverage e uniform SPL e uniform frequency response e sufficient SPL for the application This discussion represents of course just a basic approach Given the infinite variety of venues and performers users will find themselves needing to solve specific problems in specific situations RCF Shape Designer software designed to help calculate optimum splay angles aiming angles and fly bar pick points crucial in aiming the array for a given venue will be explained later in this Guide RCF SHAPE DESIGNER SOFTWARE INSTALLING RCF SHAPE DESIGNER RCF Shape Designer is supplied in a zip folder which contains a setup executable file Double click on this and follow the on screen prompts 39 COMPUTER REQUIREMENTS The RCF Shape Designer requires an IBM compatible PC with the Windows 98 Windows 98SE Windows 2000 Windows ME Windows XP or Windows NT operating systems It is not designed to work
34. g direction as its velocity increases slightly Effects of temperature gradients on sound propagation with elevated temperatures At next figure particular A we observe a situation which often occurs at nightfall when the ground is still warm The case shown at B may occur in the morning and its skipping characteristic may give rise to hot spots and dead spots in the listening area gi EFFECTS OF WIND VELOCITY AND GRADIENTS ON SOUND PROPAGATION Next figure shows the effect wind velocity gradients on sound propagation The actual velocity of sound in this case is the velocity of sound in still air plus the velocity of the wind itself The following figure shows the effect of a cross breeze on the apparent direction of a sound source The effects shown in these two figures may be evident at large rock concerts where the distances covered may be in the 200 300 m range USC I i 4 HIH VELOCITY E hi PAPEL iE FE GT el OF nl slekt VG M OF CSA LOW VELDE mA 3 VELT Y oF Too a ner fr bee Effect of wind velocity gradients on sound propagation Effect of cross breeze on apparent direction of sound EFFECTS OF HUMIDITY ON SOUND PROPAGATION Contrary to what most people believe there is more sound attenuation in dry air than in damp air The effect is a complex one and it is shown in the next figure Note that the effect is significant a only at frequencies above 2 kHz This means that high freque
35. ght refers to the height of the rear of the plane 41 For planes 1 and 2 Elevation refers to the elevation height of the front of the plane For plane 1 and 2 Distance relates to the actual distance from the front of the array to the start of the plane For all planes selecting Seated or Standing places ear level at 1 3 or 1 7m above the respective plane Filling the blank tabs it s possible to start the program COVERAGE Specify the horizontal coverage distances from the front of the array ARRAY INSTALLATION Select either Suspended or Stack in the Array installation section to determines how the array is supported auper amet ana hdi H seii i I2 Aoh Manus H in mm eig fi sl r Duna Poni fin In Suspended mode the grid is suspended and cabinets are attached beneath In Stack mode the grid forms a base and cabinets are placed on top SUSPENDED MODE AUTO H SETTING MIN TRIM HEIGHT This is the low limit for the array and is defined as the smallest allowable distance from the lowest point of the array to the ground below AUTO H SETTING MAX SUSPENSION POINT Set this to the maximum array height allowable usually the highest part of the flying frame The maximum pick height is usually chosen to allow for the maximum flying point height minus a sensible allowance for any shackles stingers bridles or flying hooks 1m should be allowed for a stinger between each grid flying
36. he array is very curved the centre of gravity can move out from the rear links In this case the front links are in compression and the rear links are supporting the total weight of the system plus the front compression Always check very carefully with the RCF Shape Designer software all this kind of situa tions even with a small number of cabinets n io 1 Ti omes I i TT a Jj i 7 ki ci nm va P F JE i j La 0 F yt Hs j AW C Jp n P oh VW db F tg 1 ring Er N System particularly tilted System very curved 16 RIGGING SYSTEM THE TTL55 A FLY BAR The TTL55 A system must be suspended using the RCF TTL55 A fly bar The TT line arrays module is provided with 4 rigging bars 2 in the front and 2 in the rear corners The rigging bars are securely connected to front and rear metal corners Front and rear metal corners are securely connected to the cabinet The rigging system is made of rigging bars and metal corners in sequence Rigging bars and metal corners are securely connected by Rectified bolts Quick lock pins The wooden cabinet is not a primary part of the rigging system THE TTL55 A FLY BAR FEATURES 1 FRONT FLYING BRACKET 2 QUICK LOCK PIN HOLE to be used to lock the front bracket before installation 3 REAR BAR HOLE 4 SAFETY CHAIN SHACKLE HOLES 5 QUICK LOCK PIN HOLE 6 P
37. he two arrays and the orientation of the left array with respect to the right array defined by the intersection of the coverage for both arrays More the arrays are rotated or panned onstage greater is the area over which stereo imaging is experienced Less they are rotated onstage and more they are aimed offstage less stereo imaging is audible Typically for concert applications L R arrays are separated 15 20 meters and used at zero degrees Experience has shown that this provides the best trade off between stereo imaging evenness of horizontal coverage and reduction of the potential for build up of low frequency and upper mid bass energy in the centre LEFT CENTRE RIGHT LCR CONFIGURATIONS Although it can be sometimes difficult to negotiate the centre position from a visual standpoint LCR systems offer more flexibility in optimising audience coverage with the potential for improved intelligibility more even horizontal tonal balance and better image localization compared with standard LR configurations When using the LCR configuration for live music applications three TTL33 A TTL31 A arrays can be installed with the C array at 0 degrees and the L R arrays panned offsta ge up to 50 degrees for speech reinforcement L R arrays can be panned offstage up to 100 degrees to optimise coverage and intelligibility For theatrical sound reinforcement the 100 degree coverage of TTL33 A TTL31 A is highly recommended to centre cluster applications and
38. ical pattern control TTL55 MID HIGH FREQUENCY WAVE GUIDES TTL55 is loaded with three 2 5inch voice coil compression driver designed with the minimum overall dimension actually on the pro audio market 4inch 102mm By the driver compact size it has been possible to fit three of them in only 310mm with evident wT benefit on tight directional vertical control over the frequencies A dedicated TTL55 high trequency wave guide couples three driver circular 1 3inch diameter isophase exit to the six rectangular output apertures through six channels with exponential area expansions Each rectangular channel exit is capable to form a perfect isophase wave front over the frequencies for best coupling to other adjacent exits From here another horns wave guide with constant directivity is introduced tor wide 90 horizontal pattern control Finally both mid and high frequency wave guides are closely fitted on TTL55 for better coupling on horizontal plane 3 C i lt TE AR if f e A JG VZ F 7 V MLA JA N H AA NIH NY YN VAS VIN VN M M VIN LUN VIN VA Ne WM AW ANY AW SA VIN I VJ IN OA SI VM AN VIN VIN y M pe M p A NEA
39. id field from 25 to 40 meters mid far field from 40 to 60 meters far field more than 60 meters 7 CLUSTER SIZE The combination of the 2 central switches gives 4 possibilities of mid low frequencies correction depending on cluster size e 4 6 modules small tlown systems e 7 9 modules medium fl own systems e 10 12 modules medium large flown systems e 13 20 modules large flown systems 8 ACTIVE NETWORK LED This led flash when there s a data transmission 9 LINK NETWORK LED This led is ON when the speaker has been recognized and connected from the RD NET master unit 10 RED ORANGE LIMITER LED This led is ON when the limiter circuit is active to prevent output distortion or damage of the speaker ORANGE Soft limiter circuit When the LED is flashing ORANGE one ot the power amplitiers reaches the maximum output for short periods of time and the working condition can be considered normal RED Hard limiter When the LED is flashing RED following the signal one of the power amplifiers reaches the maximum output for longer periods of time When the LED is blinking RED one of the RMS limiter circuit is active in order to prevent damage to one of the transducers or power amplifiers Always avoid operating conditions where the System works for long periods of time with the RED LED flashing or blinking 11 GREEN SIGNAL LED This led is ON when the audio input signal is superior to 20 dB When there is no inp
40. in the most demanding situations THE TTL33 A AMPLIFICATION SECTION FEATURES e 750 watt switching power supply module e 500 watt low frequency digital amplitier module e 500 watt midrange digital amplifier module e 250 watt high frequency digital amplifier module e extra capacitor bus able to sustain the full voltage for over 100 ms burst signals The total available power supply power is 750 watts and can be distributed to the 3 final amplifier sections Each amplifier section has a very high maximum output power capability in order to provide when necessary maximum output bursts in a specific frequency range A small fan speed controlled guarantee the air circulation inside the amplifier in the most demanding situations THE TTL31 A AMPLIFICATION SECTION FEATURES e 750 watt switching power supply module e 500 watt low frequency digital amplitier module e 250 watt high frequency digital amplifier module e extra capacitor bus able to sustain the full voltage for over 100 ms burst signals CABINET AND MECHANICS The TT line arrays cabinet is in baltic birch plywood coated with high resistance epoxy paint The wood quality the small thickness in conjunction to a proper internal bracing the metal structure design make this cabinet very light and robust a The mechanical suspension and orientation system is in high quality steel very precise and easy to use All the mechanical parts are laser cut machined and pre
41. le will be small and will widen progressively as the listening point gets closer to the line array b the vertical coverage of a curved array is given by the size or height of each box the splay angles between boxes and the number of units being flown J ARRAY A J Array is comprised of a straight line array and a curved array Gen erally the straight segment is located above the curved segment and is intended to provide the long throw component of the polar response The curved segment is intended to provide coverage in the relative TT near field f below and in front of the array Together the segments provide an asymmetric polar response in the vertical plane gt SPIRAL ARRAY T TR Like the J array a spiral array provides an asymmetric polar response SI M in the vertical plane However unlike the J array it is a continuous mg curve rather than two distinct segments The curvature increases ID with distance along the curve This results in an upper portion that is B 3 9 largely but not perfectly straight and a lower portion that is curved e el downward There are many types of spirals providing various rates of Il d LES 9 curvature The relevant set of spirals for arrays of loudspeaker enclo sures are those for which the curvature changes at predetermined LE 9 intervals of length along the spiral This length interval corresponds Per to the height of the enclosure An arithmetic spiral is one fo
42. lug and the relevant motor hook to ensure that motor chain bags do not rest on the grid or top cabinet and upset its tilt angle MANUAL H SETTING In manual installation mode it is possible to enter the height required for flying the system NUMBER OF CABINETS AND MODEL SECTION Array model and number of cabinets can be set depending also on cabs availability Array smilet ajii TT S Gaghan dna some coi giochi on TTL EL T i a a Ta 42 RCF SHAPE DESIGNER RESULTS VENUE PAGE e Graphical representations of the array and the venue e Aiming splay angle between each pair of enclosures LIN ul FE ma D m Dey Option bi l Fa roles al steril ARRAY PAGE e Height of the array and trim height to the bottom of the array from the floor e Pick Point on the Fly Bar to achieve the calculated array angle when suspended e Weight of the array e Mechanical check result ap ta rare a h re 43 MECHANICS PAGE e Cluster Mechanical specifications e Mechanical safety factors era aar ita pat aa F Plasr ha gig na Fogar Piin sg PROCESSOR PAGE e DSP preset configuration a sonuo BITE I SPL amp REPORT PAGE e On axis aiming angle for each enclosure as a difference from 0 horizontal e Various angles and throw distances calculated from the venue s dimensions e DSP preset configuration e SPL representation on the audience area 44 It is possibl
43. means that we should control vertical pattern with constructive and destructive interference up to 1100Hz Both these conditions are satisfies in the range where 12inch works As the sound wave length decreases more and more drivers smaller in size and spaced more closely are required to maintain directivity Practical line array systems act as line arrays only in the low and mid frequencies For the high frequencies some other method must be founded to reach vertical directional characteristics that match those of the low The most practical method is to use wave guides coupled to the drivers Rather than using constructive and destructive interference the waveguides achieve directionality by confining sound into a specified coverage pattern TTL55 A MID FREQUENCIES TTL55 A mid frequencies are reproduced by one 10 inch dedicated st midrange coupled to dedicated unique 90 H by 15 V wave guide It has Ny F been designed with exponential expansion area for best low frequencies _ coupling and to minimize distortion and back reflections Wave guide has SETT been designed to coupled a single annular isophase wave front on 10 inch cone to a unique rectangular horn throat capable to create a single isophase rectangular output This wave guide is than coupled to other gt horns wave guide to refine the narrow vertical coverage pattern and wide horizontal coverage pattern Final result show extremely narrow vert
44. ncies will be attenuated more with distance than low frequencies will be and that the attenuation will be greatest when the relative humidity is 20 percent or less kif ii NE ee 1 L I i a Hh EF M oH u WH LPL Se FIT Absorbption of sound in air vs relative humidity 46 Under the above conditions air absorption at 10KHz can reach 0 3dB m at 20 RH This means 30dB excess attenuation over and above the 3dB per doubling of distance at 100m from the column The incredible high frequency efficiency and headroom of the TTL33 A can prove beneficial here Air absorption also varies with temperature and is notoriously difficult to predict with accuracy The best policy is to get your crew to check all audience areas during the performance and apply a sensible amount of correction Luckily a large audience tends to raise the local humidity so HF absorption often reduces once the audience is in place Line array systems should be corrected with caution and distant audience areas rechecked at regular intervals during large events HIGH FREQUENCY COUPLING EFFECTS Planning for high frequency coverage is a matter of deciding the number of elements and fine tuning the splay angles between cabinets The number of elements does not necessarily have a significant impact on SPL at high frequencies it will at low frequencies but can profoundly affect vertical coverage and throw capabilities of the array For the far field a smaller me
45. ng them to the frame zy Depending on the two different holes on the FLY BAR TTL33A 5 D V S frame various tilt angles of the whole array are possible Check the Bal ps DE acoustical and mechanical set up with SHAPE DESIGNER software for ER dv stacked set ups E FRONT Connect front bracket of the first TTL33 A cabinet using 2 quick lock pins o lt 0 g o gt o The baffle of the bottom box in a stacked array does not necessarily have to be parallel to the stage or the array frame It can be tilted up or downward if desired In this way arced arrays can be readily created from a ground stack position 30 The bottom box in a stacked array can be tilted with 2 degrees steps to obtain proper coverage patterns from 11 to 8 as shown in the figure Reverse and connect the 2 rear STCK BAR TTL33A bracket to the first enclosure using the hole for the proper angle and quick lock pins Add TTL33A cabinets one by one as indicated for flown configurations Up to four TTL33A enclosures can be stacked and interlinked using the standard TT rigging components and the FLY BAR TTL33A flying frame as ground support Ground stacking summary possible configurations The configuration No 1 requires No 1 Stack bar accessory STCK BAR TTL33A p n 13360057 of which all bars will be used and additional Nos 16 pi
46. ns Nos 4 AC QL PIN4X p n 13360060 The configuration No 2 requires No 1 Stack bar accessory STCK BAR TTL33A p n 13360057 of which only 2 bars type A and 2 bars type B will be used and additional Nos 8 pins Nos 2 AC QL PIN4X p n 13360060 The configuration No 3 requires No 1 Stack bar accessory STCK BAR TTL33A p n 13360057 of which only 2 bars type B will be used and no additional pins are required 31 RCF TTL33 A KART The heavy duty RCF TTL33 A Kart can be use to easily transport up to 4 TTL33 A cabinets The cabinets and Kart are fully compatible and it is possible to easily transport TTL33 A cabinets in straight or splayed configurations It is possible to transport 4 TTL33 A modules with the fly bar connec ted making sure that the total system centre of gravity is properly in centre of the kart e Do not exceed 4 cabinets transportation A bigger number of cabinet can cause tipping over the stack e Always take care in case of splayed configurations that the centre of gravity of the system is properly in centre of the kart It is always possible to adjust the centre of gravity position choosing an appropriate angle between the first cabinet and the kart 32 6 The RCF TTL33 A loudspeaker employs a unique combination of drivers to enable you to optimise both coverage and directivity in a TTL33 A li To achi imal results it s i SOUND DESIGN i understand how these components work together
47. r which 2 the angle between successive enclosures changes by a predetermined angle A For example the top box might be hung at 0 the next box at 1 the next at 2 and so on This defines a spiral where the angle of the nth box is oriented to the vertical axis by 0 1 3 6 10 and so LF on an arithmetic expansion An incremental angle of 2 would yield di 0 2 6 12 20 and so on RCF Shape Designer calculates the optimum progressive curvature for a given audience area The progressive curvature produces a more consistent frequency response from the front rows to the rear seats than often used J shaped arrays having a straight long throw section at the top and a curved lower section An over angular J shaped array acts like a foreshortened straight array above a point source array and creates vertical lobes that result in irregular coverage 36 STEREO IMAGING THE LEFT RIGHT CONFIGURATION Although not the best technical solution the left right configuration meets both visual and practical criteria and is most commonly used By nature the stereo imaging of any left right system is limited for a large part of the audience and the re are compromises with respect to the consistency of tonal balance in the horizontal plane The left right configuration has the advantage of being able to reproduce effects of spatialization and localization The area over which these effects is audible depends on the separation of t
48. rray elements however is important the more TTL33 A TTL31 A loudspeakers used the more directional the vertical beamwidth becomes at the lower frequencies Apart from coverage precision and predictability another sig nificant benefit of TTL33 A TTL31 A is the fact that the system effectively extends the near field region at higher frequencies For flat TTL33 A TTL31 A arrays this results in a 3 dB reduction in SPL with doubling of distance as opposed to the 6 dB reduction N A that is typical of conventional systems This property arises due to the physics of cylindrical waves versus spherical waves Due to its lt ability to perform planar wave front TTL33 A TTL31 A has differ ent attenuation properties than conventional systems Comparing NN SPL predictions according to standard calculations is not meaning ful since TTL33 A TTL31 A produces a combination of cylindrical and spherical wave front propagation that must be evaluated using specific calculations When curved TTL33 A TTL31 A arrays are employed there is a combination of cylindrical and spherical propa gation Although pure cylindrical wave propagation is not always in effect 3 dB reduction with distance can still be obtained along with extension of the near field by correctly focusing the system on the audience Psycho acoustically near field extension allows one to 2R Cylindrical wave expands in horizontal dimension walk a considerable distance from a TTL33 A TT
49. sing the male XLR loop through connectors A single audio source can drive multiple speakers modules like a full left or right channel made ot 8 16 speaker modules make sure that the source device is able to drive the impedance load made of the modules input circuits in parallel The TT line arrays input circuit presents a 100 KOhm input impedance The total input impedance seen as a load from the audio source ex audio mixer will be e system input impedance 100 KOhm number of input circuits in parallel The required output impedance of the audio source ex audio mixer will be e source output impedance gt 10 system input impedance e always make sure that XLR cables used to feed audio signal to the system are balanced audio cables wired in phase A single defective cable can affect the performance of the overall system 12 TTL55 A INPUT x TTL55 A INPUT PANEL LEDS 1 XLR INPUT 2 XLR LINK OUTPUT 3 DATA INPUT This port is used for the network input of RD NET remote monitoring 4 DATA OUTPUT This port is used for the network daisy chain output of RD NET remote monitoring 5 BY PASS RESET This switch by pass reset the last preset loaded on TTL55A DSP with RD NET remoting control 6 HIGH FREQUENCY CORRECTION The combination of the 2 top switches gives 4 possibilities of high frequencies correction depending on target distance air absorption correction near field up to 25 meters m
50. ss Volume Control DSP PROCESSOR e 32 bits 96 KHz sampling floating point e 3 way equalisation crossover filtering fast limiter RMS limiter e array size configuration set up e distance correction set up e low filtering set up MECHANICAL Size 300 x 538 x 450 mm Weight 22 5 Kg 52 53 54 29 Www rctaudio com RCF SpA Via Raffaello 13 42124 Reggio Emilia gt Italy tel 39 0522 274411 fax 39 0522 274484 e mail rcfservice rct it 10307091 Rev D
51. t tilt the rear bracket close tilt angle and fix it 14 Always check that the pins is locked in the hole corresponding to the tilt angle shown on the bracket 15 Lifting with two chain hoists allowed adding an optional pickup point 16 Always check carefully load conditions with RCF Shape Designer 21 THE TTL33 A FLY BAR THE TTL33 A FLY BAR FEATURES 1 FRONT FLYING BRACKET Front mounting 2 QUICK LOCK PIN HOLE Front mounting to be used to lock the front bracket before installation 3 REAR BAR HOLE Front mounting 4 FRONT FLYING BRACKET Rear mounting QUICK LOCK PIN HOLE Rear mounting to be used to lock the front bracket before installation REAR BAR HOLE REAR MOUNTING FRONT STACKING POINT REAR STACKING POINT UPPER POSITION REAR STACKING POINT LOWER POSITION 10 FRONT BRACKET TRANSPORT POSITION HOLE 11 REAR BRACKET TRANSPORT POSITION HOLE 12 CORNER DOUBLE MOTOR PICK UP POINT Teens 13 CORNER DOUBLE MOTOR PICK UP POINT using the RCF TTL33 A fly bar 1412 CENTRAL PICK UP POINTS UT O co N QA OG O lt O lt AO O lt O lt OS OG 22 THE TTL31 A FLY BAR 1 Oo 0 N a uu A UJ THE TTL31 A FLY BAR FEATURES FRONT FLYING BRACKET Front mounting QU
52. th many international standards and rules The resulting Safety Factor is the minimum of all the calculated safety factors for each link or pin This is where you are working with a SF 7 Depending on local safety regulation and on situation the required AP safety factor can vary It is responsibility of the owner or rigger to make sure that the system is properly rigged in accordance with Country and local laws and regulations Ultimate Strength The RCF Shape Designer software gives detailed information of the safety factor for each specific configuration The results are classified in 4 classes 0 2 96 96 GREEN SAFETY FACTOR gt 7 SUGGESTED YELLOW 4 SAFETY FACTOR 7 ORANGE 1 5 gt SAFETY FACTOR gt 4 RED SAFETY FACTOR lt 1 5 NEVER ADMITTED A WARNING e The safety factor is the result of the forces acting on fly bar s and system s front and rear links and pins and depends on many variables number of cabinets fly bar angles angles from cabinets to cabinets If one of the cited variables change the safety factor MUST BE recalculated using the software before rigging the system e In case the fly bar is picked up from 2 motors make sure that the fly bar angle is correct An angle different from the angle used in the prediction software can be potentially dangerous Never allow persons to stay or pass under the system during the installation process e When the fly bar is particularly tilted or t
53. tion software calculates forces on every single stressed part of the assembly and shows the minimum safety factor for every link S 235 JR is a structural steel and has a stress strain or equivalent Force Deformation curve like the following o The curve is characterized by two critical points the Break Point and Umm the Yield Point The tensile ultimate stress is simply the maximum o a stress attained Ultimate tensile stress is commonly used as a criterion of the strength of the material for structural design but it should be reco gnized that other strength properties may often be more important One of these is for sure the Yield Strength Stress strain diagram of S 235 JR exhibit a sharp break at a stress below the ultimate strength At this cri tical stress the material elongates considerably with no apparent change in stress The stress at which this occurs is referred to as the yield point Permanent deformation may be detrimental and the industry adopted 0 2 plastic strain as an arbitrary limit that is considered acceptable by all regulatory agencies For tension and compression the corresponding stress at this offset strain is defined as the yield 0 2 96 15 235 JR characteristic values are R 360 N mm2 for Ultimate Strength and Rp0 2 235 N mm2 for Yield Strength In our prediction software the Safety Factors are calculated considering the Maximum Stress Limit equal to the Yield Strength according wi
54. ucts and offers the maximum output per size and weight acoustically are fully horn loaded in order to properly control directivity and to provide the highest sensitivity The system is very easily configurable the cabinet is 15 shaped and is possible to build very small flown clusters starting from 4 modules or very big long throw systems of 16 modules A 32 bit floating point DSP sampling at 96 kHz is taking care of system equalization 24 db oct crossovers soft clipping and system configuration parameters like air absorption or cluster size correction TRANSDUCERS TECHNOLOGY Each transducer has been specifically designed for the application The woofer provide large excursion and very light weight the midrange has an incredibly high BL for best vocal presence the unique compression driver design offers the minimum spacing between throats to avoid HF cancellation Thanks to the extensive use of neodymium and new basket designs the total weight of the transducers is negligible TTL33 A 8 NEO WOOFERS The MB8N251 is a high output high power handling mid bass designed to provide a very tight and fast response in band pass designs Extended response down to 60 Hz inside outside voice coil M roll surround The voice coil size is 2 5 The TTL33 A is equipped with 2 MB8N251in bandpass configuration Y The TTL31 A is equipped with 1 MB8N252 in a hybrid reflex hornloaded bandpass configuration spem
55. ut signal the led is flashing 12 YELLOW STATUS LED This LED is flashing during the bootstrap procedure and in case of communication problems with the DSP processor 13 GREEN POWER LED This led is ON when the system is connected to the AC power source and the main on off switch is in position ON 13 TTL33 A TTL31 A INPUT PANEL un p ue TTL33 A TTL31 A INPUT PANEL LEDS The input panel presents 4 system LEDs 1 XLR INPUT 2 XLR LINK OUTPUT 3 SENSITIVITY 00 4 dB 2 dB 4 HIGH PASS This switch inserts a 110 Hz 24 dB octave high pass to be used in conjunction with subwoofers without any high pass signal output When the system is used in conjunction with the TTS18 A or TTS28 A subwoofers the optimum solution is to use the high pass xover signal output from the subs and leave the line array module in full range 5 CLUSTER SIZE The combination of the 2 central switches gives 4 possibilities of mid low frequencies correction depending on cluster size e 2 3 modules used for stacking configurations e 4 6 modules small flown systems e 7 9 modules medium flown systems e 10 16 modules large flown systems 6 HIGH FREQUENCY CORRECTION The combination of the 2 top switches gives 3 possibilities of high frequencies correction depending on target distance air absorption correction near field up to 30 meters mid field from 30 to 60 meters far field more than 60 meters 7 GREE
56. y fixed inspection pin holes inspection using a pin e REAR BARS AND REAR METAL CORNERS visual inspection screws securely fixed inspection pin holes inspection using a pin e VOODEN CABINET cabinet integrity visual inspection metal corners securely fixed inspection general integrity inspection 50 8 TECHNICAL SPECIFICATIONS TTL55 A ACOUSTICAL Operating frequ range 50 20 000 Hz Max SPL 143 dB Horizontal Coverage 90 Vertical Coverage max 7 Crossover points 20 Hz 1 300 Hz TRANSDUCERS Low frequency 2 x 12 midbass neo 100 mm voice coil Mid trequency 1 x 10 midrange neo 89 mm voice coil High trequency 3 x 1 5 compression driver AMPLIFIER Total power supply switching 3500 Watt Low section D 2x 1000 Watt Mid section D 1000 Watt High section D 500 Watt CONNECTIONS XLR Ethercon Powercon Signal Input Output Power Input Output CONFIGURATION CONTROLS Array size control 4 6 7 9 10 12 13 20 Distance control Ner fild Mid fild Mid far Far DSP PROCESSOR e 32 bits 96 KHz sampling floating point e 3 way equalisation crossover filtering fast limiter RMS limiter e array size configuration set up e distance correction set up e low filtering set up MECHANICAL Size 1020 x 380 x 550 mm Weight 67 Kg TTL33 A ACOUSTICAL Operating frequ range 60 20 000 Hz Max SPL 135 dB Horizontal Coverage 100 Vertical Coverage 15 depending on contiguration Crossover points
57. y made of six cabinets can be rigged in two group of three cabinets each group directly from the kart Ay WARNING This procedure is generally more dangerous and it is very important to respect the following limits of application e NEVER CONNECT A GROUP OF CABINETS BIGGER THAN 4 e NEVER CONNECT CABINETS IN GROUPS IF THE ARRAY IS BIGGER THAN 8 e NEVER CONNECT CABINETS IN GROUPS IF THE ARRAY IS VERY CURVED e NEVER FLY THE SYSTEM AT TEMPERATURES LESS THAN 5 C Use the same general strategy un rigging the system 27 TTL33 A GROUND STACKING The mechanical design of the suspension system allows the TTL33A system to be either flown or ground stacked Either method requires the array frame the FLY BAR TTL33A Even the smallest of arrays benefit from a careful review of what vertical coverage is being created and how that affects the liste ning environment Typically four TTL33A enclosures is the minimum practical array format if controlled coverage and precise directivity is a system design criteria for an event The figure below shows a ground stack of four boxes with a mild baffle arc setting on TT subs This array solution can be expected to provide controlled directivity This type of compact array can work well in small venues including concert clubs and smaller auditoriums In addition to its flown capabilities the FLY BAR TTL33A frame forms a secure base for ground stacking having rubber feet already installed REAR ST

User Manual - A.C. Entertainment Technologies

Contents

Download Pdf Manuals

Related Search

Related Contents