Ray Sub Series
Contents
1. 10 55 RS18 GENERAL INSTRUCTIONS 2 RS18 GENERAL INSTRUCTIONS 2 4 Mounting Rigging Plate IMPORTANT IN ORDER TO PREVENT SCREWS FROM GETTING LOOSE USE BLOCKING LIQUID LOCTITE 243 OR EQUIVALENT FOR ALL SCREWS USED WITH RS18 ACCESSORIES 2 1 1 RS18 Painted e Tools Allen Key 6mm e Remove the twelve screws on each side of RS18 e Remove the four screws on each side of RS18 RS18 GENERAL INSTRUCTIONS Page 11 55 e Insert Spacer between cabinet and Rigging plates e Fill each screw hole with Loctite 243 or equivalent e Tighten the 6 screws alternately at the rate of 4 revolutions per screw e Fill each screw hole with Loctite 243 or equivalent e Insert the 8 handles washers and screws and tight them INSTALLING PAINTED RS18 RIGGING PLATES IMPORTANT RS18 handles must not be used to fly RS18 s through illegal use of straps for example 12 55 RS18 GENERAL INSTRUCTIONS 2 1 2 RS18 Carpeted e Tools Allen Key 6mm e Remove the twelve screws on each side of RS18 RS18 GENERAL INSTRUCTIONS Page 13 55 e Fill each screw hole with Loctite 243 or equivalent e Tighten the 6 screws alternately at the rate of 4 revolutions per screw e Fill each screw hole with Loctite 243 equivalent e Insert the 8 Handles washers and screws and tight them INSTALLING CARPETED RS18 RIGGING PLATES IMPORTANT RS18 handles must not be u2. 20 42 RS amp S18 setups on TDControllers sessi seinen 20 5 Connection dlagramis i a IEEE aaa nce pi ee Eee cat nice nnmnnn 21 5 1 RS18 with NX242 ES4 TD Controller Stereo Omni Mode 21 5 2 HS18 with NX242 ES4 TD Controller Stereo Directional Mode 22 5 8 HS18 with NXAMP4x4 Stereo Omni Mode esses 23 5 4 HS18 with NXAMP4x4 Stereo Directional 24 6 55 INTRODUCTION 6 RS18 Rigging IDnSIFHICHONS ente tane erie 25 SARE TY ES eret eto tes Los Ei 25 6 1 1 Flown 25 6 1 2 Ground Stacking Safety doner atu ee Ga nee 26 DIS uote ts herd RS 27 6 2 Flying RS18 ANNEE A 28 6 2 1 Aoist Rating I n 28 6 2 2 Connecting first RS18 to eere 28 023 nn cod 28 6 2 4 Adjusting rigging point for 29 625 Flying s bseq ent HS di GO RE WZ at Page bd datas 29 6 3 Testing and Maintenance of the RS18 flying 32 General guidelines for subwoofer design 33 7 4 LowfFrequency ISSUES due a eod ix uana dag eed eoo
3. RS Ray Sub Series RS18 Subwoofer z User Manual er Manual V1 01 RaySub Series Us Date 01 03 2010 2 55 INTRODUCTION GOING ONE STEP FURTHER IN LOW FREQUENCY CONTROL RAY SUB TECHNOLOGY Radiation control of low frequencies is hard to achieve due to wavelength being larger than cabinet size Consequently most of current subwoofers available on the audio professional market are omnidirectional Drawbacks in using omnidirectional subwoofers are known by experienced engineers Low Frequency sound pressure level is typically higher on stage than over the audience high pass filters are mandatory in almost all microphones inputs to avoid feedback from the microphones to the subwoofers Moreover gain from microphone to speakers is highly limited due to that feedback reinforcing a double bass can be an enormous challenge Indoor environments typically have much higher reverberation time in the Low Frequency range than in the mid and high Frequencies This characteristic is emphasized by the omnidirectional pattern of conventional subwoofers all sound engineers experienced kick drum lasting forever Many outdoor shows occur nearby residential areas where noise constraints are very restrictive in such cases low frequencies levels over the audience have to be limited so that environment criterias are fulfilled possibly leading to unacceptable wideband limitations Gradient subwoofers provi
4. m i SP4 Connector LJ A g z Connector UJ REAR FRONT FRONT REAR Speaker Speaker Speaker Speaker CONNECTOR PLATE IN DIRECTIONAL MODE e Omni Mode it is recommended to install the connector panel on the side opposite to the drivers factory default configuration T mj i D ml FOH CONNECTOR PLATE IN OMNI MODE 2 2 2 RS18 connectors RS18 is connected through Speakon NL4FC plugs not supplied Either connector can be used to connect an amplifier or to link to an additional RS18 cabinet Connectors are wired as follows Speakon NL4F Omni Mode Directional Mode Comment Connectors 18 driver Right 18 driver Rear Driver Next to d Panel 18 driver Right 18 driver Rear 18 driver Left 18 driver Front Driver Opposite to 2 T 18 driver Left 4 18 driver Front Connector Panel RS18 GENERAL INSTRUCTIONS Page 17 55 DIRECTIONAL MODE 2 2 8 Cabling e NEXO recommends the exclusive use of multi conductor cables to connect the system the cable kit is compatible with all the cabinets and there is no possible confusion between Front and Rear drivers e Cable choice consists mainly of selecting cables of the correct sectional dimension size in relation to the load resistance and the cable length Too small a cable section will increase both its serial r
5. 0 39 25mm 10mm 11 73 298mm RS18 TECHNICAL SPECIFICATIONS Page 49 55 10 3 8 RS18 FPLATES Dimensions 225 57mm 320 81mm Page 50 55 RS18 TECHNICAL SPECIFICATIONS 10 3 4 RS18 FRONT WHEELBOARD Dimensions 6 68 169 78mm d 5449 U 1384mm 10 3 5 RS18 DOLLY Dimensions 719 183mm 1498mm RS18 TECHNICAL SPECIFICATIONS Page 51 55 10 4 242 54 Digital TDController 10 4 1 Specifications SPECIFICATIONS Output Level 28 dBu Max into 600 Ohm load Dynamic Range 110 dBu THD Noise lt 0 002 flat setup for output at 27 5dBu Latency time 1 7ms on a flat setup Power Supply 90V 260V PRODUCT FEATURES Audio Inputs 2 Audio Inputs 24 bit converters Electronically Balanced 50k Ohm 2 XLR 3F Connectors 4 Digital Ethersound Inputs with NXTension ES4 Card Sense Inputs 4 Amplifier Sense Inputs Floating 150 kO 18 bit converters 8 Pole Removable Strip Terminal Audio Outputs 4 Audio Outputs 24 bit converters Electronically balanced 50 Ohm 4 XLR 3M connectors 4 Digital Ethersound Outputs with NX ES4 Card enabled for compatible amplifiers only 24 bit data with 48 bit accumulator 200 MIPS Front Panel Menu A and Menu B buttons 16 characters by 2 lines display Select Wheel amp Enter button 4 IN Clip DSP Clip red LED s Speaker Protection yellow LED for each channel Individual Mute Solo button
6. Right or Rear 2 2 Left or Front The RS18 must use separate cables to the main system Bumper Flying Plates Dolly Front Wheel Board Rigging system d Please refer to the user manual before any operation SHIPPING amp ORDERING Packaging RS18s are packaged individually Order RS18 C finished grey carpeting or RS18 P finished in black structured coating As part of a policy of continual improvement NEXO reserves the right to change specifications without notice a Response curves and data anechoic far field above 200 Hz half space anechoic below 200 Hz b Sensitivity amp peak SPL will depend on spectral distribution Measured with band limited pink noise Refers to the specified 3 dB range Data are for speaker processor recommended amplifier combinations c Directivity curves and data 1 3 octave smoothed frequency response normalized to on axis response Data obtained by computer processing of off axis response curves d Please refer to the RS18 user Manual RS18 TECHNICAL SPECIFICATIONS Page 47 55 Usable range data frequency response capability with TD crossover slopes removed 10 2 Dimensions 4992 1268mm 55 24 1403 i 48 55 RS18 TECHNICAL SPECIFICATIONS 10 3 RS18 Accessories 10 3 1 RS18 BUMPER Dimensions 10 3 2 RS18 Push Pins Dimensions 51 85 1317mm 0 79
7. IMPORTANT RS18 bumper is designed to be flown from one rigging point only Motor hoist must be rated to support entire cluster weight Required items e 1 RST BUMPER18 4 Quick release pins 10x25mm included e N Pair of RS18 Rigging Plates RST FPLATES18 for cabinets 4xN quick release pins 10x25mm included 6 2 1 Hoist Rating N being RS18 quantity within a cluster cluster weight is given by Wauster 30kg 66lbs Nx 131kg 289lbs including cable weight up to 5kg 111bs per RS18 Hoist rating is e Upto3 RS18 cluster ton hoist e 4106 RS18 cluster 1 ton hoist e 7 0 12 RS18 cluster 2 ton hoist 6 2 2 Connecting first RS18 to bumper e Connect bumper to first RS18 flying system link plates by using 4 10x25mm quick release pins e ensure the 4 quick release pins are properly locked e Connect hoist hook to bumper axis see below RS18 RIGGING INSTRUCTIONS Page 29 55 6 2 4 Adjusting rigging point for horizontality Before connecting a second cabinet bumper angle has to be adjusted for perfect horizontality This requires that the rigging point is adjusted in the two horizontal directions so that the bumper remains horizontal within 1 Adding cabinets will improve this tolerance Adjusting 0 along the cabinet depth Adjusting horizontality along cabinet depth is done by properly selecting bumper hole GRIDS SAME SIDE GRIDS ALTERNATE SIDE 6 2 5 Fly
8. NXAMP4x4 4 x 1900 Watts 8 Ohms 2 x 6800 Watts 8 Ohms 4 x 3400 Watts 4 Ohms 2 x 8000 Watts 4 Ohms 4 x 4000 Watts 2 Ohms 4 1 1 NXAMP connectors NXAMP4x1 and NXAMP4x4 rear panels feature 4 analog inputs outputs links on XLR3 connectors e 4 digital inputs outputs on RJ45 connectors with optional card 4speaker level outputs on NLAFC connectors Figure below shows connectors implementation on the rear panel NEXO NXAMP4x4 o d MNT t f uem gt gt C CZ 4 1 2 RS18 and NXAMP recommended configurations OMNI MODE DIRECTIONAL MODE 1x 518 1 channel of NXAMP4x1 in Bridge Stereo Mode 2 channels of NXAMP4x1 in Bridge Stereo Mode 1 channel of NXAMP4x4 in 4 channels mode 2 channels of NXAMP4x4 in 4 channels mode 2 x RS18 2 channels of NXAMP4x1 in Bridge Stereo Mode 2 channels of NXAMP4x1 in Bridge Stereo Mode 2 channels of 4 4 4 channels mode 2 channels of NXAMP4x4 in 4 channels mode 3 x RS18 2 channels of NXAMP4x4 in 4 channels mode 2 channels of NXAMP4x4 4 channels mode 42 RS18 setups on NXAMP TDControllers At RS18 release time February 2010 60 setups combining RS18 with NEXO speakers are available in NX242 ES4 NXAMP load 2 52 Please consult www nexo sa com periodically for upgrade releases CONNECTION DIAGRAM
9. 9 R518 System 44 9 1 Are the NX Digital TDcontrollers properly 44 9 2 Are the amplifiers properly configured 44 9 3 the amps and the NX properly connected 44 9 4 Are the speakers properly connected 44 9 5 Final Pre Sound Check GTIGEK uocari alah RNA RU e fera Re Redde 45 10 RS18 Technical Specifications nee 46 10 1 System SPECINCANONS io cs e tati etie Bl do a eub ibat Rent 46 10 2 DHTOFISIOIIS creo or Mite A C A 47 MOTO ACO SSONNOS REA A ote cu C d st 48 10231 CRSTSBUMPER iC rete to n b lad mte Cl Go MERE ud 48 10 22 ROTO zana ao R aeons 48 10 9 9 RSTEFPERTES Sa UO 49 10 3 4 RS18 FRONT WHEELBOBARD eene en A 50 10857 HSIS DOLEY xo te eR REOR DA eal 50 10 4 NX242 ES4 Digital TDController ss 51 TOAT Specifications 51 10 4 2 Front and Rear Panel 822 CZA xta 51 10 5 NXAMP4x1 8 NXAMP4x4 Powered Digital 52 52 10 5 2 Front and Rear Panel vies ss dois mares de 53 11 RS18 Parts 8 Accessories List inner 54 11 1 Modules amp Cont
10. INTRODUCTION Page 9 55 As for all NEXO systems the RS18 is controlled powered and monitored by dedicated NEXO TDControllers NX242 ESA4 Digital TDController provides comprehensive control of RS18 loudspeakers in multiple configurations It allows Ethersound digital audio networking as well as remote control for all units in the network It has 2 analogue 4 digital inputs and 4 analogue 4 digital outputs IMPORTANT NX242 must be equipped with NX Tension Card to access RS18 directional mode setups e NXAMP4x1 and NXAMP 4x4 are Powered Digital Controllers providing full control and amplification for RS18 in multiple configurations Both devices feature 4 analogue inputs and 4 speaker outputs When equipped with optional card 4 digital inputs in Ethersound digital audio network format as well as remote control for all units in the network become available For a complete description of these controllers please refer to User Manuals The NX242 and NXAMP DSP algorithms and parameters are fixed in software and updated regularly Please consult the NEXO web site www nexo fr for the latest software releases Please devote your time and attention to reading this manual A comprehensive understanding of RS18 specific features will help you to operate your system at its full potential TERNA GeoDPassivemode Crossover 80Hz___ Om 451 GS Y
11. RST 6 6 inu FPLATES18 Rigging plate pair RST WB18 n A 2 Wheels on wood skids pair RST DOLLY18 SS RS18 Dolly 3 RS18 max USER NOTES Page 55 55 12 USER NOTES France Nexo S A Parc d Activit de la Dame Jeanne F 60128 PLAILLY Tel 33 3 44 99 00 70 Fax 433 3 44 99 00 30 E mail info nexo fr WWW nexo sa com
12. 12 RS18 cluster flown at 10m 30ft will provide a 3dB pressure level deviation at 100Hz over an audience area 75m 200ft deep while maintaining 15 to 20dB attenuation on stage see figure below 12 518 ALTERNATE CLUSTER OVER 75M 200FT 8 3 Steered RS18s arrays 8 3 1 Steering technique RS18s arrays must be flown vertically with bumper set horizontally and all cabinets at 0 Coverage adjustments can be efficiently implemented through the steering technique which consists in implementing delays in cabinets to tilt coverage up or down IMPORTANT Steering techniques should not be applied to clusters of less than 3 RS18 Coverage control through steering technique increases with cluster height Steering can be applied by unit group of 2 or group of 3 in Omni Mode as well as in Directional Mode Page 40 55 RAY SUBS IMPLEMENTATION Ai AY t 4 1 1 r t t GROUP OF 2 RS18S STEERING GROUP OF 8 RS18S STEERING Steering delays values for the pairs can easily be computed according to following formula t h sin 0 C metric is the value to be applied to the second pair his the height of tilted elements 1 04m for 2 RS18s 1 56m for 3 RS18s C is the speed of sound 343m s 8 3 2 Delay values implementation e f the coverage is to be tilted down then top group delay should be set at Oms and delay should progressively increase on lower grou
13. 7 4 Stereo Design If stereophonic implementation has to be maintained then Left and Right array coverage patterns have to be as independent as possible ie coverage overlap from Left to Right has to be minimized When using few cabinets minimizing overlap can only be achieved with directional devices by rotating the subwoofers 30 to 45 outwards rotating an omnidirectional subwoofer makes no difference in the coverage pattern When using a larger amount of cabinets Left and Right subwoofers arrays must be designed so that level drops as much as possible inwards and is maintained as going outwards Therefore main axis efficiency must be orientated outwards through use of delays or curving the array outward as in below figure Such arrays must be experimented playing one side only to check if above condition is fulfilled and then summed left and right for interference evaluation see below drawings Although pressure level will still drop in the centre vicinity overall level in the audience area is comparable to what occurs at the centre Curved Sub Array Steered Sub Array LEFT IMPLEMENTATION MINIMIZING RIGHT COVERAGE LEFT AND RIGHT SUM Advantage of stereo design as oppose to mono design is much improved phase relationship between subwoofer arrays and main systems since distance between them is greatly reduced However it is essential to keep in mind that stereo subwoofer array design always leads to str
14. current capacity is the specification into a 2 Ohm load It is possible to perform an amplifier listening test by loading the amps with twice the number of cabinets considered for the application 2 speakers per channel instead of one 4 instead of 2 and running the amps up to the onset of clipping If the signal does not noticeably deteriorate the amplifier is well adapted overheating after approximately ten minutes is normal but thermal protection must not operate too quickly after starting this test 3 3 Amplifier settings Gain value Gain is the key to correct alignment of the system It is especially important to know the gain of all amplifiers used in your set up The tolerance should be about 0 5 dB In practice this can be difficult to achieve because e Some amplifier brands have an identical input sensitivity for models of different power rating this infers a different voltage gain for each model For example a range of amplifiers with different power outputs all having a published input sensitivity of 775mV OdBm or 1 55V 6dBm will have a wide range of actual gains the higher the power the greater the gain e Various other brands may offer constant gain but only within a given product range for example they may fit fixed input sensitivity only on their semi professional amps e Even if a manufacturer applies the constant gain rule to all models the value selected will not necessarily be the same as that chosen by other m
15. 18 4 RS18 Stereo Directional Mode RS18 Rear Left RS18 Front Left RS18 Rear Right RS18 Front Right Output parameters Amp Amp Global Global Sense Array EQ Headrom EJ 4 Gain 2 Power 2 Gain Delay Gain LAll channels 2648 refertoamp 048 5bas 1 Local gain and delay values are inter locked on channel 1 amp 2 and 3 amp 4 in Directional Mode 2 values for recommended amplifier gain and power should be set in agreement with selected amplifiers specifications 3 Should be in agreement with implemented cluster acts on a shelving filter designed to compensate for LF coupling 4 Disabled when using digital inputs 9 2 Arethe amplifiers properly configured Gain Switch Limiter High Pass All channels Stereo 26 dB None None 9 3 Are the amps and the NX properly connected Check that the sense lines on the NX s are properly connected by applying a signal to the corresponding output and verify that the correct Sense LED illuminates 9 4 Are the speakers properly connected e Attach the first serie of modules to the bumper e Before flying verify that all drivers of all modules are functioning properly e Make sure that each RS18 driver is producing proper summation in omni mode e The two RS18 individual 18 driver should sum up by 6 dB e Doubling RS18 quantity 2 4 and so on should also produce 6 dB gain e Make sure that each RS18 is producing the proper fro
16. S Page 21 55 5 CONNECTION DIAGRAMS 5 1 RS18 with NX242 ES4 TD Controller Stereo Omni Mode FROM AMPLIFIERS TO AMPLIFIERS NJ H zou am N C NG OUT OUT RIGHT LEFT Page 22 55 CONNECTION DIAGRAMS 5 2 RS18 with NX242 ES4 TD Controller Stereo Directional Mode FROM AMPLIFIERS TRE OUT OUT OUT OUT IN RIGHT IN LEFT RIGHT RIGHT LEFT LEFT FRONT REAR FRONT REAR CONNECTION DIAGRAMS Page 23 55 5 3 RS18 with NXAMP4x4 Stereo Omni Mode i 7 xli INB INA Page 24 55 CONNECTION DIAGRAMS 5 4 RS18 with NXAMP4XxA Stereo Directional Mode TUE TU MSA ae gone INB INA RS18 RIGGING INSTRUCTIONS Page 25 55 6 RS18 RIGGING INSTRUCTIONS Before proceeding with assembly of RS18 arrays please ensure that the components are present and undamaged A component list is appended to this manual In the event of any shortage please contact your supplier For maximum efficiency the RS18 rigging system requires three experienced persons for set up typically one motor hoist operator and one RS18 operator per side of the array Good synchronisation and
17. acement protection preventing over excursion Temperature protection preventing voice coil damage Inter channel regulation Delay Up to 150m 3308 in 10cm 4 steps Input Patching Allows any of the inputs to be routed to any output Output Gain Global and individual channel gain 6dB in 0 5dB steps Volume Control Global and individual channel gain inf to OdB in 16 variable steps Save Recall Stores up to 40 user setups On the Fly recalls Array EQ LF or HF shelving filters to compensate for arrays quantity dependent behaviour Security Mode Password protected for Read Only or Remote Only modes Remote Control Green Status Full Remote Control via Ethersound Digital Network Protocole and ESMonitor software STATUS ROHS WEEE Certification UL SEMKO CE CCC KOREA TSS PSE Page 54 55 RS18 PARTS amp ACCESSORIES LIST 11 RS18 PARTS amp ACCESSORIES LIST 11 1 Modules amp Control Electronics List DRAWING DESCRIPTION RS18 Subwoofer NX242 ES4 R lil eed Digital TDController with NX ES4 Card NXAMP4x1 Power Digital TDController 4x1300W 2Q gt TU NXAMP4x4 Power Digital TDController 4x4000W 20 de a 11 2 Accessories List DRAWING DESCRIPTION RST BUMPER18 lt lt Main RS18 Bumper
18. anufacturers e Some products can exhibit manufacturing tolerances for the same model of 1dB or more Some amplifiers may have been modified possibly without any label indicating the new values Others may have gain switches fitted internally where it is impossible for the user to verify the actual setting without opening the amplifier casing e n cases where you don t know the gain of your amplifier or want to check it please follow this procedure 1 Unplug any loudspeakers from the amplifier outputs AMPLIFIER SELECTION FOR USE WITH RS18 Page 19 55 2 With a signal generator feed a sine wave at 1000Hz at a known voltage say 0 5V to the input of the amplifier under test 3 Measure the voltage at the output of the amplifier 4 Calculate the gain using the formula Gain 20 LOGio Vout Vin Some examples Vin Gain 32dB 37dB 1 4V sensitivity 1350Wrms 0 1V 1V 2V 4V V 0 5V 5V 10 V 20 V 35 4 V 1V 10V 20V 40 V 70 8V Remember that constant sensitivity settings will give a different gain value when the amplifier power is different NEXO recommends low gain amplifiers 26dB is recommended as it is at the same time adequately low and quite common amongst amplifier manufacturers This gain setting improves signal to noise ratio and allows all preceding electronic equipment including the NX242 ES4 TDcontroller to operate at optimum level Remember that using a high gain amplifier will raise th
19. ard Speaker Outputs Connectors 4 Speakon outputs with internal power relays for automatic output assignment RS232 Port Allows firmware upgrade for software improvement and new speakers setups GPIO Port 5 Global Purpose Inputs and 8 Global Purpose Outputs software assigned DSP Processing Two DSP s 24bits 48bit accumulator 700MIPS Front Panel On off Mains switch Select Wheel Menu A and Menu B buttons 40x2 characters display amp protect stand by and power LED s volume indicators 15 LED s Mute buttons and red LED output current signal green LED Speaker protection yellow LED amp peak red LED Rear Panel 1 NXAMP4x1 or 2 NXAMP4x4 mains sockets RS232 serial communication connector GPIO port expansion slot for digital audio network extension card 4 XLR inputs 4 XLR links 4 Speakon NL4 Power Supply Dedicated versions for 100 120 V or 220 240 V Dimensions amp Weight System Selection NXAMP4x1 19 Rack 457mm 18 Depth 16 5kg 33lbs net NXAMP4x4 40 19 Rack 457mm 18 Depth 24 5kg 4916 net NXAMP USER CONTROLS Allows control across all NEXO range System Setup Protections factory defined Within selected range allows cabinets to be set for passive or active wideband or cross over cross over points omni or directional modes Peak limiters fitted for both selected speaker and amplifier Acceleration protection preventing membrane stress Displ
20. crosscheck between the operators are key elements for a reliable and safe set up 6 1 SAFETY FIRST RS18 Rigging System structural computations and related documents are available in Geosoft2 or at Nexo info nexo fr upon request We include this section to remind you of safe practice when flying the RS18 system Please read it carefully However user must always apply his or her knowledge experience and common sense If in any doubt seek advice from your supplier or NEXO agent This manual offers guidance only for RS18 RAYSUB systems References in this manual to other rigging equipment such as motor hoists steels shackles etc are made to clarify the description of RS18 procedures The user must ensure that operators are properly trained by other agencies in the use of these items The RS18 Rigging System has been optimised for the deployment of vertical arrays of RS18 loudspeakers No angle adjustment is allowed between cabinets The RS18 Rigging System is a professional precision tool set and should be handled with extreme care Only persons who are fully conversant with the operation of the RS18 Rigging System and provided with suitable safety equipment should deploy RAYSUB Arrays Misuse of the RS18 Rigging System could lead to dangerous consequences Used and maintained correctly the RS18 Rigging System will give many years of reliable service in portable systems Please take the time to read and understand this manual 6 1 1 F
21. de an elegant solution to the above issues based on a technology that is a simple transposition to sound sources of what has been applied for decades in microphones radiated field derives from pressure differences generated from two or more sources Rear radiation is lowered by more than 12 dB which benefits to stage as well as to neighbours Direct to reverberant ratio is increased by nearly 6 dB in the low frequency range which potentially gives back a kick drum its original punch However there are efficiency limitations gain in lower bandwidth is reduced when sources become too close in relation to wavelength and pattern control is limited in upper bandwidth when both sources interfere destructively in the radiation axis Operating bandwidth were efficiency combines with pattern control is around 2 octaves Poor correlation between cabinet design and targeted specifications leads to two and eventually more drivers in directional mode producing less energy than one driver in omnidirectional mode which is not acceptable for simple practical aspects such as weight and volume It is now 8 years that NEXO has released its first gradient subwoofer the CD12 complemented since then with the CD18 GEO SUB and RS15 These have been quickly adopted worldwide as standards and are considered today as state of the art subwoofers This success is a consequence of proper cabinet design and optimized definition of phase relations thro
22. doe aede 33 7 2 Gradient Subwoofers benefits 34 752 Monophonic oaa bu ak 34 ZA SIEIGO DESION T 35 RAY SUBS Implementation tn ope cae teme oer ire etes 36 8 1 OMMAONECHONAAMODEN KSU uua ius tte a iade 36 8 1 1 Single HS T8 ess SL t 36 B2 RSL AMYS NK GR 36 8 2 Directional MOJOR SAR PA sad tt dee 36 8 2 1 Single RS 36 S22 RS LOS PA Re Tee EE 37 82530 1 on ey ee AU oM ed 39 8 3 Steered 5195 2 Oto e 39 8 3 1 Steering technique tete eel esta b e dH eee eters 39 8 3 2 Delay values implementation ss 40 8 33 41 8 4 Aligning RS18s with main system sisse 41 8 4 1 NEXO systems acoustic reference 41 8 4 2 a nec le O eka mies 42 8 4 3 Alignment with distance measurement 42 8 4 4 A Alignment with phase measurement 43 8 5 Recommended installation tools and equipment 43 INTRODUCTION Page 7 55
23. e noise floor proportionally Operating Mode Most two channel amplifiers available on the pro audio market have the following operating modes e Stereo two fully independent channels deliver identical power into identical loads Bridge Mono the second signal channel processes the same input as the first channel but with reversed phase The single load is connected between the two positive channel outputs using a suitable connection While the total output of the amplifier remains the same the available output voltage the minimum impedance that can be connected and the voltage gain are doubled as compared with stereo operation Typically only channel 1 input is active Positive and negative output connections vary depending on amplifier manufacturers NEXO does not recommend Bridge Mono Mode unless amplifier power is clearly not sufficient IMPORTANT When in Bridge Mono mode check your amplifier user manual for proper connection of outputs 1 and 2 in relation to input phase e Parallel mono the output terminals of the two channels are configured in parallel using an internal relay The single load is connected either to the output of channel 1 or to that of channel 2 as if in stereo While the total output of the amplifier remains the same the output voltage level is also the same as in stereo mode The minimum impedance that can be connected is reduced by half due to the fact that current capability is doubled Typicall
24. es very strong interference patterns these are related to Left and Right path length difference to listener location while pressure levels are comparable for Left and Right arrays while always maximum at the center where distance to Left and Right arrays are equal pressure level can severely drop at locations where path length equals half the wavelength of frequency of interest This effect is well known from audio engineers and often referred to as Power Alley REFLECTING REFLECTING WALL WALL e n closed venues room eigen modes nulls and max are dominant over source location because these modes depend on accurate characterization of boundary surfaces walls ceiling floor audience f1 C 2L coverage is very hard to predict DISTANCE To overcome these difficulties some common sense rules can help Page 34 55 GENERAL GUIDELINES FOR SUBWOOFER DESIGN 7 2 Gradient Subwoofers benefits Gradient subwoofers can provide up to 15 dB front to rear average attenuation Please refer to Ray Sub technical note for in detail explanation on gradient subwoofers Low frequency level on stage is therefore significantly reduced on stage and in the neighbouring environment in open air venues Because of their directional pattern Gradient subwoofer are also less sensitive to room eigen modes 7 3 Monophonic Design Left and Right subwoofer arrays can be merged into a monophonic system so that i
25. esistance and its capacitance this reduces the electrical power delivered to the loudspeaker and can also induce response damping factor variations e For a serial resistance less or equal to 4 of the load impedance damping factor 25 the maximum cable length is given by Lmx ZXS Zin Ohm Lax in meters e table below indicates these values for 3 common sizes Load Impedance 2 4 8 Cable section Maximum Length meters 2 5 mm AWG 12 5 10 20 4 mm AWG 10 8 16 32 2 2 4 Example e Each 518 driver has 8 Ohms nominal impedance in omni mode both loudspeakers can be driven in parallel on one amplifier channel presenting therefore a 8 2 4 Ohms load impedance The maximum acceptable 2x2 5 mm AWG 12 cable length Lmax for RS18 with its 2 drivers in parallel is 10 meters e When driven in directional mode RS18 requires 2 amplifier channels presenting therefore two independent 8 Ohm load impedances The maximum acceptable 4x1 5 AWG 110 cable length Lmax for RS18 with its 2 drivers driven independently is 32 meters IMPORTANT Long speaker cables induce capacitive effects up to hundreds of pF depending on the quality of the cable with a low pass pass effect on high frequencies If long speaker cables must be used ensure that they do not remain coiled while in use 18 55 AMPLIFIER SELECTION FOR USE WITH RS18 AMPLIFIER SELECTION FOR USE WITH RS18 NEXO
26. he supporting structure upon which a ground stack is to be built Always look beneath PA wings to inspect the deck support and if necessary ask for the stage scrims and dressings be removed to allow access If the stage surface slopes as it does in some theatres ensure that the system is prevented from sliding forwards due to vibration This may require the fitting of timber battens to the stage floor For outdoor systems ensure that that the system is protected from wind forces which might cause the ground stack to become unstable Wind forces can be huge especially upon large systems and should never be underestimated Observe meteorological forecasts calculate the worst case effect upon the system prior to erection and ensure that the system is secured appropriately Take care when stacking cabinets Always employ safe lifting procedures and never attempt to build stacks without sufficient personnel and equipment Never allow anyone whether operators artists or members of the public to climb onto a ground stacked PA system Anyone who needs to climb over 2m 6 ft high should be fitted with suitable safely equipment including a clip on harness Please refer to local Health and Safety legislation in your territory Your dealer can help with advice on access to this information Apply the same attention to all safety matters when de stacking systems Be aware that safety procedures are as important in the truck and in the warehouse as t
27. hey are at the venue RS18 RIGGING INSTRUCTIONS Page 27 55 IMPORTANT All RS18 Accessories are specifically rated in agreement with structural computations Never use other accessories including push pins when assembling RS18 cabinets than the ones provided by NEXO NEXO will decline responsibility over the entire RS18 accessory range if any component is purchased from a different supplier 6 1 3 Contacts Correct training is fundamental to safe practise when working with loudspeaker flying systems NEXO recommend that users contact local industry associations for information on specialist courses Information for International training agencies can be obtained by contacting either The Production Services Association Rigstar Training and Testing Center PSA 82 Industrial Dr Unit 4 School Passage Northampton Massachusetts 01060 U S A Kingston upon Thames Phone 413 585 9869 Fax 413 585 9872 KT1 SDU Surrey school rigstar com ENGLAND Telephone 44 0 181 392 0180 ESTA Entertainment Services amp Technology Association 875 Sixth Avenue Suite 1005 NEW YORK NY 10001 USA Phone 212 244 1505 Fax 212 244 1502 info esta org Page 28 55 RS18 RIGGING INSTRUCTIONS 6 2 Flying RS18 arrays IMPORTANT Maximum allowed RS18 quantity to be flown is 12 RS18 bumper rigging point must be adjusted so that bumper always remains horizontal RS18 flying system forbids angles between adjacent cabinets
28. ill lose some hearing if exposed to sufficiently intense noise for a sufficient of time The U S Government s Occupational and Health Administration OSHA has specified the following permissible noise level exposures Sound Duration Per Day In Hours Sound Level dBA Slow Response 8 90 6 92 4 65 3 97 2 100 1 102 1 105 1 110 14 or less 115 According to OSHA any exposure in excess of the above permissible limits could result in some hearing loss Ear plugs or protectors to the ear canals or over the ears must be worn when operating this amplification system in order to prevent a permanent hearing loss if exposure is in excess of the limits as set forth above To ensure against potentially dangerous exposure to high sound pressure levels it is recommended that all persons exposed to equipment capable of producing high sound pressure levels such as this amplification system be protected by hearing protectors while this unit is in operation SYSTEM RIGGING SAFETY RULES Before use of RS Subwoofers please ensure that anyone involved in system deployment understands the rigging and stacking Safety rules as described in the RS18 HARDWARE SAFETY FIRST section Failure to do this exposes people to potential injury or death ELECTRICAL SAFETY WARNING NX242 ES4 DIGITAL CONTROLLER NXAMP4x1 AND NXAMP4x4 POWERED CONTROLLERS ARE CLASS 1 APPARATUS AND MUST BE EARTHED The green and yellow wire of the main
29. ing subsequent RS18s e Lift assembly to sufficient height in order to connect a second RS18 e Position and align second RS18 below assembly e Remove the 4 quick release pins from the PARKING position so that sliding connector plate can be moved Page 30 55 RS18 RIGGING INSTRUCTIONS e both sides push the top RS18 sliding connecting plate all the way downwards into the second RS18 rigging system e Insert the 4 quick release pins into the FLOWN position of second RS18 e ensure quick release pins are properly locked e Repeat above steps for subsequent RS18 s e Lift cluster up to defined rigging height and secure it horizontally to prevent rotation RS18 RIGGING INSTRUCTIONS Page 31 55 SAFETY e Secure bumper with secondary safety steel 96H 0 0 6e 8 IMPORTANT Do not attempt to make any change to the bumper rigging point once the cluster is lifted IMPORTANT The requirements for secondary safety systems vary with territories However the secondary safety steel MUST have a SWL equivalent or greater than that of the rigging system Page 32 55 RS18 RIGGING INSTRUCTIONS 6 3 Testing and Maintenance of the RS18 flying system General please keep regular maintenance attention to the RS18 flying system in order to provide long and reliable service NEXO recommends regular testing of loudspeaker rigging components preferably usi
30. lown Systems Safety e Always inspect all the rigging components and cabinets for damage before assembly Pay special attention to the lifting points and safety clips If you suspect that any of the components are damaged or defective DO NOT USE THE AFFECTED PARTS Contact your supplier for replacements Read this manual carefully Also be familiar with the manuals and safe working procedures for any ancillary equipment that will be used with the RS18 Rigging System e Ensure that all local and National regulations regarding the safety and operation of flying equipment are understood and adhered to Information on these regulations can usually be obtained from Local Government Offices e When deploying RS18 system always wear protective headwear footwear and eye protection e Do not allow inexperienced persons to handle a RS18 system Installation personnel should be trained in loudspeaker flying techniques and should be fully conversant with this manual e Ensure that motor hoists hoist control systems and ancillary rigging components are currently certified as safe and that they pass a visual inspection prior to use e Ensure that the public and personnel are not allowed to pass beneath the system during the installation process The work area should be isolated from public access e Never leave the system unattended during the installation process e Do not place any object no matter how small or light on top of the system duri
31. n Omni Mode is center of the front grid e RS18 s reference point in Directional Mode is center of the face opposite to connector panel RS18 REFERENCE POINT IN OMNI MODE RS18 REFERENCE POINT IN DIRECTIONAL MODE Page 42 55 RAY SUBS IMPLEMENTATION 8 4 2 Precautions It is common to use the AUX send of a mixing desk to drive the Sub section of a PA system This gives the mixing engineer more flexibility to set the level of the subbass relative to the main PA apply special effects or to use a different EQ on the Sub However it also raises some serious issues for the performance amp safety of the system mostly time alignment At NEXO great care is taken to design optimum phase alignment from one octave above to one octave below the crossover frequency point By doing so drivers are working perfectly together and providing the best efficiency possible It is then up to the user to adjust the delay on the NX TDControllers to match the physical path difference of the different systems It is thus possible to get a well adjusted system even without measuring instruments If RS18s are driven form an AUX output NX TDController is fed with two signals coming from different sources If those two sources MAIN output amp AUX send are not exactly in phase delay is introduced into the crossover between main system and RS18s It is then mandatory to use proper measurement tool to optimize phase response IMPORTANT Before using differen
32. ng a suitable test rig coupled with a visual inspection Fasteners there are several critical points in the RS18 cabinets primary concerns are the grid screws attaching the grid to the cabinet the screws attaching the connecting plates to the cabinet These fasteners should be regularly checked and tightened as necessary Cleaning The exterior of the cabinet and the rigging system can be cleaned with a damp cloth soaked in mild soapy water On no account use solvent based cleaners which may damage the finishing of the cabinet After cleaning the rigging system must be treated with a suitable lubricant to prevent rusting NEXO recommends the use of Scottoil FS365 or equivalent which is a water based lubricant with a mixture of machine oil surfactant and anti rust treatment GENERAL GUIDELINES FOR SUBWOOFER DESIGN Page 33 55 7 GENERAL GUIDELINES FOR SUBWOOFER DESIGN 7 1 Low Frequency Issues Even low frequency coverage is amongst the toughest issues in sound system design Common issues that are faced in design are as follow e Low frequency radiation is hard to control efficiently because of wavelength becoming large 10m 30ft at 34 Hz in relation to sources and most of available subwoofers are omnidirectional this results in important low frequency feedback on stage environmental problems outdoor venues and increased reverberation time in indoor venues e Stereophonic implementation of subwoofers introduc
33. ng the installation procedure The object may fall when the system is flown and is likely to cause injury e Secondary safety steels must be installed once the system has been flown to the operating height Secondary steels must be fitted irrespective of requirements of the local safety standards applicable to the territory 26 55 RS18 RIGGING INSTRUCTIONS 6 1 2 Ensure that the system is secure and prevented from pivoting around the motor hoist Avoid any form of excessive dynamic loading to the assembly structural computations on RS18 Rigging System are based on a 1 1 2 factor for hoist or motor acceleration NEVER attach any item to the RS18 system other than the RS18 accessories When flying outdoor systems ensure that the system is not exposed to excessive wind or snow loads and is protected from rainfall The RS18 Rigging System requires regular inspection and testing by a competent test centre NEXO recommend that the system is load tested and certified annually or more frequently if local regulations require When de rigging the system ensure that the same duty of care is given to the procedure as for the installation Pack RS18 components carefully to prevent damage in transit Ground Stacking Safety Statistically many more injuries occur due to unstable ground stacked PA systems than those associated with flown systems There are several reasons for this fact however the message is clear Always survey t
34. nt rear summation in directional mode RS18 SYSTEM CHECK LIST Page 45 55 when listening from behind the system switch the front drivers in and out You should hear a reduction in the LF range when the both front and rear drivers are on as compared to when the rear drivers only are on When listening from the front you should hear a strong increase in the LF range when connecting the rear drivers Raise the bumper attach the next series of modules and repeat the above checks Make sure that these series of modules sum properly with the modules above them 9 5 Final Pre Sound Check Check Play a CD track preferably generous and periodic in the LF content on the SUB output mono left mono right and then both sides both sides must sound strictly identical when listening at the center level must not decrease at the center when playing left and right simultaneously as opposed to one side only Play the same CD track on the MAIN system on the SUB system then on both Inverting polarity on one of these outputs MAIN or SUB should always result in a massive difference near the crossover point 46 55 RS18 TECHNICAL SPECIFICATIONS 10 RS18 TECHNICAL SPECIFICATIONS 10 1 System specifications RS18 PRODUCT FEATURES 2 x 18 46cm long excursion neodynium 80 drivers 520 x 1403 x 732mm 20 46 x 55 24 x 28 81 with handles 520 x 1238 x 732mm 20 46 x 49 92 x 28 81 without handles Weight Net Weight wi
35. nterferences no longer exist When using few cabinets this can be done by installing these cabinets at the centre front stage If cabinets are set on the ground in front of the stage level discrepancy from first to last rows will be important Flying cabinets above centre stage will reduce first to last rows discrepancies significantly CENTRE STACKED DIRECTIONAL SUBWOOFER CENTRE FLOWN DIRECTIONAL SUBWOOFER When using a larger amount of cabinets these can then be installed all across the stage provided distance between units does not exceed half the wavelength of the upper frequency limit 1 7m 5 6ft at 100 Hz Array coverage can then be adjusted geometrically by curving the array horizontally so that it matches the audience area which creates an asymmetrical front stage to rear stage pattern with a hot point on stage or electronically by implementing a delay that increase from the centre to the sides which creates a symmetrical pattern front to rear In both cases omnidirectional subwoofers should be avoided so low frequency that level on stage does not exceed level in the audience CURVED SUBWOOFER ARRAY ACROSS STAGE STRAIGHT DELAYED SUBWOOFER ARRAY ACROSS STAGE GENERAL GUIDELINES FOR SUBWOOFER DESIGN Page 35 55 Main drawback of monophonic designs as the ones described above is inconsistent phase relationship between subwoofer arrays and main systems over the audience area lack of impact in the 80Hz 125Hz bandwidth
36. nts provided measurement microphone is set on the ground to avoid floor interference in the reading floor is perfectly rigid concrete measurement microphone is set far from any walls ceiling or inside angles corners coherence values are high typically above 75 If one of above conditions is not respected then distance measurement should be preferred Recommended installation tools and equipment Tape measure should be 30m 100ft in length and be of durable fibre material Have one per array available to speed up the installation process Laser Inclinometer For measuring vertical and horizontal angles in the venue An ideal product is the Calpac Laser projecting a dot version which costs approximately 60 Spirit level used to ascertain the trueness of the surface from which the angle measurements originate Rangefinder measuring device either a Disto type laser measure or an optical laser rangefinder can be used Devices such as the Bushnell Yardage Pro sports rangefinders provide sufficiently accuracy and are easy to use They have the additional advantage of working very well in bright sunlight Electronic calculator with trigonometric functions to calculate the height from ground level to points in the room The formula to calculate height of a point from measured angle and distance is Height of point Sin vertical angle in degrees x distance to point NB Take care when using spreadsheets a
37. ong interferences in the centre alley vicinity a couple of steps left and right of mixing position A successful design requires minimizing the audience area over which these interferences occur and therefore lots of on site experimentation Page 36 55 RAY SUBS IMPLEMENTATION 8 RAY SUBS IMPLEMENTATION 8 1 Omnidirectional Mode 8 1 1 Single RS18 Omnidirectional Mode implementation should be favoured in configurations where sufficient depth is not available for directional implementation proscenium front stage etc Strong rear radiation is not critical Although wide in both cases coverage is slightly narrower along RS18 s width than height see drawings below HORIZONTAL COVERAGE IN OMNI MODE VERTICAL COVERAGE IN OMNI MODE 8 1 2 RS18 arrays IMPORTANT RS18s arrays must be installed with bumper set horizontally and all cabinets at 0 Design procedure should be in agreement with what has been described in the preceding section See following section on Steered Arrays 8 2 Directional Mode 8 2 1 Single RS18 Single RS18 have an asymmetrical pattern in the horizontal plane ie speakers on the side which is tilled 30 off axis towards speakers direction vertical pattern ie speakers facing up or down is symmetrical HORIZONTAL COVERAGE IN DIRECTIONAL MODE VERTICAL COVERAGE IN DIRECTIONAL MODE RAY SUBS IMPLEMENTATION Page 37 55 IMPORTANT So that directional behaviour and aco
38. ps e f the coverage is to be tilted up then lower group delay should be set at Oms and delay should progressively increase on upper pairs e Delay value for first group is always e Delay value for second unit or group is Delay values for subsequent units or groups are 2 3t etc Table below lists these values for typical angle values TILT ANGLE 1 RS18 DELAY ms 0 0 0 1 0 3 0 4 0 5 0 6 0 8 0 9 1 0 ia DISTANCE cm 0 5 9 13 18 22 26 30 37 GROUP DELAY ms 0 0 0 3 0 5 0 8 1 0 1 3 1 5 1 7 1 9 2 1 2 RS18s DISTANCE cm 0 9 18 27 36 44 52 60 67 74 GROUP DELAY ms 0 0 0 4 0 8 1 2 1 6 1 9 2 3 2 6 2 9 32 3 RS18s DISTANCE cm 0 14 2 40 53 66 78 89 100 110 RAY SUBS IMPLEMENTATION Page 41 55 8 3 3 Coverage result Below figure shows coverage control over distance with a steering delay sequence corresponding to a 15 tilt down 12 RS18 ALTERNATE CLUSTER OVER 75M 200FT STEERED 15 DOWN 8 4 Aligning RS18s with main system 8 4 1 NEXO systems acoustic reference point The NX TDControllers factory presets are optimised to provide the best possible crossover between the RS18 as and PS8 PS10 PS15 GeoS8 Geo12 systems These crossover algorithms are defined for speaker acoustic reference points being aligned The acoustic reference point on all NEXO products is the front of each cabinet therefore e RS18 s reference point i
39. recommends high power amplifiers in all cases Budget constraints are the only reason to select lower power amplifiers A lower power amplifier will not reduce the chances of driver damage due to over excursion and may actually increase the risk of thermal damage due to sustained clipping If an incident occurs on an installation without protection the fact that amplifiers only generating half their rated output power 3dB are used will not change anything in respect of possible damage This is due to the fact that the RMS power handling of the weakest component in the system is always 6 to 10 dB lower than the amplifier rating 3 1 RS18 recommended amplification RS18 is rated for very high power handling and has a 2x8 Ohms nominal impedance Nexo recommends amplifiers in agreement with table below Recommended OMNI MODE DIRECTIONAL MODE Amplifier 1 x 518 2 x 1250 Watts to 3000 Watts 8 Ohms or 2 x 1250 to 3000 Watts 8 Ohms 1 x 2500 Watts to 6000 Watts 4 Ohms driving both drivers in parallel requires dedicated speaker cable 3 2 Current rating It is very important that the amplifier behaves correctly under low load conditions A speaker system is reactive by nature on transient signals like music it will require four to ten times more instantaneous current than its nominal impedance would indicate Amplifiers are generally specified by continuous RMS power into resistive loads however the only useful information about
40. rol Electronics List saa ee ieget etai niet 54 11 2 AGGOSSOFOS LISE zad c 54 12 USER NOTES ihi ec pecu LL ELLE 55 8 55 INTRODUCTION 1 INTRODUCTION Thank you for selecting a NEXO RS18 Subwoofer System This manual is intended to provide you with necessary and useful information about your RS System which includes the following products e RS18 is a Directivity Configurable Subwoofer which comprises two 18 46cm long excursion Neodynium direct radiating drivers mounted in a dual volume vented enclosure with aerodynamic profiled vents its coverage ranges from omnidirectional to highly directional and its frequency response extends from VLF to LF ranges Two versions are available Touring and Fix installations with two finishing for both versions carpeted or painted e a full range of accessories that provides safe flexible and simple means of transporting and installing RS18 subwoofers in fixed installation as well as in touring applications These include flying hardware dolly and wheelboard R M p f al L CIEL rail 1 iur Exe SOG gt Ses nn lt Due ES ib reor cie poe En L IR CN JUR curs JR koi i mE aies
41. s and red LED for each channel Amp Sense amp Peak green amp red LED s for each channel Processing FLASH EPROM Rear Panel RS232 connector for serial com 2 x RJ45 connectors Software updates upgrades new system setups available on www nexo sa com Dimensions amp Weight 1U 19 Rack 230 mm 9 Depth 10 4 2 Front and Rear Panel view 52 55 RS18 TECHNICAL SPECIFICATIONS 10 5 NXAMP4x1 8 NXAMP4x4 Powered Digital TDControllers 10 5 1 Specifications SPECIFICATIONS NXAMP4x1 NXAMP4x4 Number of Amplifier Channels 4 channels 2 by 2 bridgeable 4 channels 2 by 2 bridgeable Max Output Voltage no load 4x105V 4 x 200 V Max Output Power 80 4 x 600 W 4 x 1900 W Max Output Power 4 4x900W 4x3300W Max Output Power 2 2 4x1300W 4x4000W Power Consumption Standby 10 W 20W Power Consumption Idle 100W 150W Power Consumption 1 8 Power 1100W 3000 W Analog Input Channels 4 channels In Out Frequency Response Input Impedance 0 from 10 Hz to 20 kHz 20 kQ Max Input Level 28 dBu Dynamic Range 105 dB unweighted THD Noise Typical 0 1 flat setup Latency Time Audio Inputs Connectors 500us on flat setup FEATURES 4 balanced analogue inputs on XLR3F links on XLR 4 digital inputs via optional Ethersound C
42. s cord must always be connected to an installation safety earth or ground The earth is essential for personal safety as well as the correct operation of the system and is internally connected to all exposed metal surfaces INTRODUCTION Page 5 55 TABLE OF CONTENTS T zl A AE z LEA Da 8 2 RS18 General Instructions i iere end einen 10 2 1 MOUNTING 10 2 1 1 RSI tell i o s Me di 10 242 RSS to easet ides 12 21 3 DAD 14 2 1 4 RS TS Wheel BG mentione duda st EE 15 2 2 Speaker GORMECHON so ac Acer e Me 16 2 2 1 Configuring Connector and Owner 16 2 2 2 16 LU NEBST M Lu AA REA 17 2 2 4 Examplecs eM UM Ip 17 3 Amplifier selection for use With 18 18 2 1 518 recommended amplification 2 2 AO ine etre dixic dee 18 3 2 UENIT EET 18 5c MEM Ts HT Tengo mt 18 4 NEXO TD Controllers and RS18 Setups nee 20 41 518 and NXAMP TDControllers 5 teet e 20 4 1 1 NXAMP C nNEGI rS ip e A ed deco trac a oe Feci Re tug tr ratae dau du ratu a 20 4 1 2 RS18 and NXAMP recommended configurations
43. s they calculate using radians by default To convert degrees to radians use the formula Angle in radians 3 142 x Angle in degrees 180 Computer Laptop or Desktop PC running Windows 2000 or XP with the current version of NEXO GeoSoft2 installed It is not possible to configure a Geo tangent array properly without using GeoSoft2 Note that when GeoSoft2 designs are prepared prior to arrival at the venue it is often necessary to modify or update the design to accommodate special circumstances A PC is absolutely essential to make such changes Audio Analysis Software recommended but not absolutely essential programs such as Easera Systune Spectralab or WinMLS enable rapid and detailed analysis of the installation Consider taking a training course in using one of these tools if you are not already competent with them it will pay dividends in increased performance of the system 44 55 RS18 SYSTEM CHECK LIST 9 RS18 SYSTEM CHECK LIST It is essential to execute all these check steps prior to a sound check on the front end to the system Following this checklist step by step will prevent many troubles and will save time in the end 9 1 Arethe NX Digital TDcontrollers properly configured IMPORTANT If you must change any of the parameters listed below make sure that you use the same values on all NX s Output Assignment NX Setup NXChannel 1 2 3 4 RS18 4 Channels Omni Mode RS18 1 RS18 2 RS18 3 RS
44. sed to fly RS18 s through illegal use of straps for example 14 55 RS18 GENERAL INSTRUCTIONS 2 1 3 RS18 Dolly IMPORTANT 1 TRANSPORTING RS18 DOLLY REQUIRES THAT FLYING PLATES ARE INSTALLED ON ALL CABINETS SO THAT RS18 S CAN BE SECURED TOGETHER 2 RS18 DOLLY IS DESIGNED FOR UP TO 3 RS18 S AND BUMPER NEVER EXCEED THESE QUANTITIES e first RS18 must be locked to the RS18 dolly using 4 push pins according to below drawing e Subsequent RS18s are stacked on top using four push pins per additional cabinet to secure the assembly Bumper is to be attached to the top cabinet RS18 GENERAL INSTRUCTIONS Page 15 55 2 1 4 RS18 Wheel Board e Pull wheel board lockers inwards e Maintain lockers while positioning wheel board on RS18 front panel e Release lockers IMPORTANT ENSURE WHEEL BOARD IS PROPERLY LOCKED TO RS18 Page 16 55 RS18 GENERAL INSTRUCTIONS 2 2 Speaker connection 2 2 4 Configuring Connector and Owner plates Owner and connector plates can be exchanged depending on chosen directional configuration Please note that connector plates can pass through the holes it is therefore not required to unsolder the connectors e Directional Mode it is recommended to install the connector panel on the side which supports the rigging plates e Connection side is always opposite to FOH main lobe direction Top View Top View SP4
45. t outputs of a mixing desk ensure that MAIN and SUB outputs are in phase Never add additional low pass filtering on the SUB output or high pass filtering on the MAIN output Always apply identical processing EQ etc on both outputs so that the phase relationship between MAIN and SUB is not altered 8 4 3 Alignment with distance measurement The fastest way to align RS18 arrays to a main system is simply to measure distance difference from listening point to RS18 and main system reference points being the distance from GEO 512 array to listener position and being the distance from RS18 to listener position the distance difference is then r r specified meters or feet e gt the delay should be set on the RS18 TDcontroller channel e lt delay should be set on the GEO 512 TDcontroller channel e gives conversion from distance to delay in meters 343 m s NEXO recommends that main system and subwoofer systems are adjusted so that arrivals from RS18 and PS GEOS are coincident at a fairly distant listening position mixing position or further Because of proper acoustic reference point definition in NEXO TDControllers DSP setups this method is highly reliable Mixing position or further RAY SUBS IMPLEMENTATION Page 43 55 8 5 8 4 4 Alignment with phase measurement Phase measurement with real time FFT analyzer can also provide reliable measureme
46. th handles 105Kg 231 5 Ibs Net Weight with rigging system 126Kg 278 16 Net Weight without accessories 90Kg 199 Ibs 4 x NLAMP SPEAKON 4 pole on two connection plates In amp Through Construction Baltic Birch ply finish with structured black coating Dark grey carpet finish also available RS18 with NX242 ES4 TDcontroller or NXAMP SYSTEM SPECIFICATION eL Peak SPL 1m b 143 146dBPeak 140 143dBPeak 2x1250 to 2 x 3000W 8Q 2x1250W to 2 x 3000W 8Q Dispersion Omni amp Directional pattern over the entire useable bandwidth depending on the NX242 or NXAMP TDcontrollers setup two channels of the NX242ES4 or NXAMP are required to process directional setups Directivity Index c 1 5 lt Q lt 2 1 7dB lt DI lt 3dB Q 4 33 DI 5 3dB Crossover Frequency From 75Hz to 100Hz From 75Hz to 100Hz NX242 or NXAMP TDcontrollers preset dependent Nominal Impedance 2x 80 Recommended Amplifiers 1 amplifier channel is required for omni 2 amplifier channels are required for mode operation rated at 2000 to 4000 Watts directional mode operation each rated at into 40 1000 to 2000 Watts into 80 per channel SYSTEM OPERATION Electronic Controller NX242ES4 Digital TDcontroller amp NXAMP Powered Digital TDcontroller presets are precisely matched to RS18 and include sophisticated protection systems Using RS18 without a properly connected TDController will result in poor sound quality and can damage components Speaker Cables 1 1
47. ugh sophisticated DSP algorithms leading to high directional control and SPL output INTRODUCTION Page 3 55 With RAY SUB patent pending technology NEXO is again moving one step forward RAY SUB technology is about optimizing positioning and phase relationship of radiating surfaces in vented enclosures so that acoustic distance from rear to front sections always increases as frequency decreases consequently rear and front section always sum up efficiently typically 5 dB gain from rear section in the forward direction and cancel in the rearward direction Used as a single cabinet RAY SUB Technology allows the same cabinet to be configured for any polar pattern omnidirectional as a standard direct radiating subwoofer when speakers are facing the audience or highly directional when cabinet is rotated speakers sideways or upwards Used in arrays RAY SUB subwoofers can be set back to back front to front in vertical columns and beam steered upwards or downwards provided column length is sufficient NEXO RAY SUB technology brings a never achieved low frequency directional control to the sound reinforcement industry raising one more time NEXO standards 4 55 INTRODUCTION SAFETY ISSUES IMPORTANT NOTICE CONCERNING HIGH SOUND PRESSURE LEVELS Exposure to extremely high noise levels may cause a permanent hearing loss Individuals vary considerably in susceptibility to noise induced hearing loss but nearly everyone w
48. ustic load are not altered no reflecting surface should be at less than 50cm 20 from the RS18 side walls and drivers In case of stereo configurations NEXO recommends that speaker side is set outwards to minimize interference region in stereo designs 8 2 2 RS18s pair There are four ways of using pairs of RS18s in directional mode one side alternate back to back and face to face 50cm 20 between grids All of these configurations have symmetrical patterns with a smooth 15dB attenuation at the rear over the entire RS18 bandwidth but significantly different horizontal coverage side configuration has a constant 3 dB coverage of 120 from 31 5 Hz to 80 Hz back to back configuration has 3dB coverage which decreases from 90 at 31 5 Hz to 60 at 80Hz alternate configuration has a constant 3dB coverage of 90 from 31 5Hz to 80Hz face to face configuration has a 3 dB coverage which increases from 90 at 31 5 Hz to 120 at 800 Hz Page 38 55 RAY SUBS IMPLEMENTATION c cio RAY SUBS IMPLEMENTATION Page 39 55 8 2 3 RS18s arrays IMPORTANT RS18s arrays must be installed with bumper set horizontally and all cabinets at 0 Flying RS18s columns can significantly improve low frequency coverage in the vertical plane and therefore over audience depth provided height is sufficient A
49. y only channel 1 input is active e does not recommend Parallel Mono Mode for RS18 amplification Warning on amplifiers signal processing features Some high end amplifiers may include signal processing functions similar to those found in the NX242 54 TDcontroller loudspeaker offset integration limiter compressor etc Moreover when this processing is digital computation latency time can introduce a few milliseconds delay from input to output These functions are not adapted to specific system requirements and may interfere with the complex protection algorithms used in the NX242 ES4 NEXO do not advise using other protection systems in conjunction with the NX242 ES4 and they should be disabled IMPORTANT For proper system protection no latency time or non linear devices should be inserted between the output of NX242 ES4 TDController and the input of loudspeakers through use of DSP modules such as internal amplifier signal processing Page 20 55 NEXO TD CONTROLLERS AND RS18 SETUPS 4 NEXO TD CONTROLLERS AND RS18 SETUPS 4 1 RS18 and NXAMP TDControllers NEXO Powered TDControllers NXAMP 4X1 amp 4X4 are integrated solutions for Control and amplification for all NEXO speaker ranges NXAMP4x1 and NXAMP4x4 power capability is listed in the table below Mode 4 Channels Bridge Stereo NXAMP4x1 4x 650 Watts 8 Ohms 2 x 1800 Watts 8 Ohms 4 x 900 Watts 4 Ohms 2 x 2600 Watts 4 Ohms 4 x 1300 Watts 2 Ohms
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