Related Manuals for Nexo RS18
Summary of Contents for Nexo RS18
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Page 1: User Manual
Ray Sub Series RS18 Subwoofer User Manual RS18 Subwoofer User Manual V1.02 Date: 31/08/2010... - Page 2 NEXO released its first gradient subwoofer – the CD12 – in 2002, which has been complemented since then by CD18, GEO SUB and RS15. These have been quickly adopted worldwide as standards, and are considered today as state of the art subwoofers.
- Page 3 PLEASE READ CAREFULLY BEFORE PROCEEDING Page 3/54 With RAY SUB patented 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;...
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Page 4: Please Read Carefully Before Proceeding
Water exposure: Do not expose the speaker system to direct rain, do not use it near water or in wet conditions. Do not place containers with liquid on speaker system as they might spill into openings. If any liquid such as water seeps into the speaker system, have it inspected by qualified NEXO personnel. - Page 5 PLEASE READ CAREFULLY BEFORE PROCEEDING Page 5/54 SAFETY INSTRUCTIONS FOR NEXO TD CONTROLLERS NEXO ANALOGUE TDCONTROLLERS, NX242 DIGITAL CONTROLLER, NXAMP4x1 AND NXAMP4x4 POWERED CONTROLLERS ARE CLASS 1 APPARATUS AND MUST BE EARTHED. THE GREEN AND YELLOW WIRE OF THE MAINS CORD MUST ALWAYS BE CONNECTED TO AN INSTALLATION SAFETY EARTH OR GROUND.
- Page 6 Page 6/54 PLEASE READ CAREFULLY BEFORE PROCEEDING HIGH SOUND PRESSURE LEVELS Exposure to extremely high noise levels may cause permanent hearing loss. Individuals vary considerably in susceptibility to noise-induced hearing loss but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a sufficient period of time.
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Page 7: Table Of Contents
RS18 and NXAMP recommended configurations..............21 RS18 setups on NXAMP TDControllers.................... 21 Connection diagrams..........................22 RS18 with NX242-ES4 TD Controller (Stereo Omni or Directional Mode) ........22 RS18 with NXAMP4x4 (Stereo Omni or Directional Mode) ............... 23 RS18 Rigging Instructions ........................24 SAFETY FIRST .......................... - Page 8 NXAMP4x1 & NXAMP4x4 Powered Digital TDControllers..............51 10.5.1 Specifications ........................... 51 10.5.2 Front and Rear Panel view ....................... 52 RS18 Parts & Accessories List ......................53 11.1 Modules & Control Electronics List ....................53 11.2 Accessories List..........................53 USER NOTES............................54...
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Page 9: Introduction
Page 9/54 NTRODUCTION NTRODUCTION 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: • 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;... - Page 10 Page 10/54 NTRODUCTION As for all NEXO systems, the RS18 is controlled, powered and monitored by dedicated NEXO TDControllers: • NX242-ES4 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.
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Page 11: Rs18 General Instructions
ENERAL NSTRUCTIONS 1.1 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. 1.1.1 RS18 Painted • Tools: Allen Key 6mm. • Remove the twelve screws on each side of RS18. - Page 12 Fill each screw hole with Loctite 243 or equivalent. • 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)
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Page 13: Rs18 Carpeted
RS18 G Page 13/54 ENERAL NSTRUCTIONS 1.1.2 RS18 Carpeted • Tools: Allen Key 6mm. • Remove the twelve screws on each side of RS18. • Remove the four screws on each side of RS18. - Page 14 Fill each screw hole with Loctite 243 or equivalent. • Insert the 8 Handles washers and screws and tight them. INSTALLING CARPETED RS18 RIGGING PLATES IMPORTANT RS18 handles must not be used to fly RS18’s (through illegal use of straps for example)
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Page 15: Rs18 Dolly
RS18 DOLLY IS DESIGNED FOR UP TO 3 RS18’S AND BUMPER; NEVER EXCEED THESE QUANTITIES. • The first RS18 must be locked to the RS18 dolly using 4 push-pins according to below drawing; • Subsequent RS18s are stacked on top using four push-pins per additional cabinet to secure the assembly. -
Page 16: Rs18 Wheel Board
Page 16/54 RS18 G ENERAL NSTRUCTIONS 1.1.4 RS18 Wheel Board • Pull wheel board lockers inwards; • Maintain lockers while positioning wheel board on RS18 front panel ; • Release lockers. IMPORTANT ENSURE WHEEL BOARD IS PROPERLY LOCKED TO RS18... -
Page 17: Speaker Connection
CONNECTOR PLATE IN OMNI MODE 1.2.2 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... -
Page 18: Cabling
1.2.4 Example • Each RS18 driver has a 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... -
Page 19: Amplifier Selection For Use With Rs18
RS18 MPLIFIER SELECTION FOR USE WITH NEXO 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. - Page 20 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.
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Page 21: Nexo Td Controllers And Rs18 Setups
2 channels of NXAMP4x4 in 4 channels mode 3.2 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. -
Page 22: Connection Diagrams
Page 22/54 ONNECTION DIAGRAMS ONNECTION DIAGRAMS 4.1 RS18 with NX242-ES4 TD Controller (Stereo Omni or Directional Mode) FROM AMPLIFIERS TO AMPLIFIERS IN RIGHT IN LEFT + 4 - + 3 - + 2 - + 1 - RIGHT RIGHT LEFT... -
Page 23: Rs18 With Nxamp4X4 (Stereo Omni Or Directional Mode)
Page 23/54 ONNECTION DIAGRAMS 4.2 RS18 with NXAMP4x4 (Stereo Omni or Directional Mode) OUT C OUT A IN B IN A... -
Page 24: Rs18 Rigging Instructions
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. -
Page 25: Ground Stacking Safety
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. -
Page 26: Contacts
RS18 accessory range if any component is purchased from a different supplier. 5.1.3 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:... -
Page 27: Flying Rs18 Arrays
• 1 x Bumper (RST-BUMPER18) , 4 Quick release pins 10x25mm included; • N Pair of RS18 Rigging Plates (RST-FPLATES18) for N cabinets, 4xN quick release pins 10x25mm (included). 5.2.1 Hoist Rating N being RS18 quantity within a cluster, cluster weight is given by:... -
Page 28: Adjusting Rigging Point For Horizontality
Adjusting horizontality along cabinet depth is done by properly selecting bumper hole: GRIDS SAME SIDE 5.2.4 Flying subsequent RS18s • Lift assembly to sufficient height in order to connect a second RS18; • Position and align second RS18 below assembly; • Remove the 4 quick release pins from the PARKING position so that sliding connector plate can be moved;... - Page 29 RS18 R Page 29/54 IGGING NSTRUCTIONS • On both sides, push the top RS18 sliding connecting plate all the way downwards into the second RS18 rigging system • Insert the 4 quick release pins into the FLOWN position of second RS18 •...
- Page 30 Page 30/54 RS18 R IGGING NSTRUCTIONS • Secure bumper with secondary safety steel. 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...
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Page 31: Testing And Maintenance Of The Rs18 Flying System
5.3 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 using a suitable test rig coupled with a visual inspection. -
Page 32: General Guidelines For Subwoofer Design
Page 32/54 ENERAL GUIDELINES FOR SUBWOOFER DESIGN ENERAL GUIDELINES FOR SUBWOOFER DESIGN 6.1 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: • Low frequency radiation is hard to control efficiently because... -
Page 33: Gradient Subwoofers Benefits
Page 33/54 ENERAL GUIDELINES FOR SUBWOOFER DESIGN 6.2 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. -
Page 34: Stereo Design
Page 34/54 ENERAL GUIDELINES FOR SUBWOOFER DESIGN 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). 6.4 Stereo Design If stereophonic implementation has to be maintained, then Left and Right array coverage patterns have to be as independent as possible –... -
Page 35: Ray Subs Implementation
See following section on Steered Arrays 7.2 Directional Mode 7.2.1 Single RS18 Single RS18 have an asymmetrical pattern in the horizontal plane (ie speakers on the side), which is tilted 30° off-axis towards speakers direction; vertical pattern (ie speakers facing up or down) is symmetrical). -
Page 36: Rs18S Pair
So that directional behaviour and acoustic 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. -
Page 37: Rs18S Arrays
A 10 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). -
Page 38: Delay Values Implementation
S IMPLEMENTATION 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 39: Coverage Result
The acoustic reference point on all NEXO products is the front of each cabinet, therefore: • RS18’s reference point in Omni Mode is center of the front grid • RS18’s reference point in Directional Mode is center of the face opposite to connector panel. -
Page 40: Precautions
7.4.3 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 main array to listener position, and r... -
Page 41: Alignment With Phase Measurement
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... - Page 42 Page 42/54 RAY SUB S IMPLEMENTATION 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 , Smaart or WinMLS...
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Page 43: Rs18 System Check List
The two RS18 individual 18” driver should sum up by 6 dB; • Doubling RS18 quantity (2, 4 and so on) should also produce 6 dB gain. • Make sure that each RS18 is producing the proper front/rear summation in directional mode:... -
Page 44: Final Pre-Sound Check Check
Page 44/54 RS18 S YSTEM HECK • 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;... -
Page 45: Rs18 Technical Specifications
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. Response curves and data: anechoic far field above 200 Hz, half-space anechoic below 200 Hz. -
Page 46: Dimensions
Page 46/54 RS18 T ECHNICAL PECIFICATIONS Usable range data: frequency response capability with TD crossover slopes removed. 9.2 Dimensions 49,92" 1268mm 55,24" 1403mm... -
Page 47: Rs18 Accessories
RS18 T Page 47/54 ECHNICAL PECIFICATIONS 9.3 RS18 Accessories 9.3.1 RS18-BUMPER Dimensions 51,85" 1317mm 9.3.2 RS18 Push-Pins Dimensions [ 0,79" ] [ 0,39" ] 25mm 10mm... -
Page 48: Rs18-Fplates
Page 48/54 RS18 T ECHNICAL PECIFICATIONS 9.3.3 RS18-FPLATES Dimensions 2,25" 57mm 7,60" 3,20" 193mm 81mm... -
Page 49: Rs18-Front Wheelboard
RS18 T Page 49/54 ECHNICAL PECIFICATIONS 9.3.4 RS18-FRONT WHEELBOARD Dimensions 6,68" 169,78mm 54,49" 1384mm 9.3.5 RS18-DOLLY Dimensions 7,19" 183mm 58,98" 1498mm... -
Page 50: Nx242-Es4 Digital Tdcontroller
Individual Mute/Solo buttons and red LED for each channel Amp. Sense & Peak (green & red) LED’s for each channel FLASH EPROM Software updates/upgrades, new system setups, available on www.nexo-sa.com Rear Panel RS232 connector for serial com 2 x RJ45 connectors Dimensions &... -
Page 51: Nxamp4X1 & Nxamp4X4 Powered Digital Tdcontrollers
NXAMP4x1: 3U 19” Rack – 457mm (18”) Depth – 16.5kg (33lbs) net NXAMP4x4: 4U 19” Rack – 457mm (18”) Depth – 24.5kg ( 49lbs) net NXAMP USER CONTROLS System Selection Allows control across all NEXO range System Setup Within selected range, allows cabinets to be set for: passive or active;... -
Page 52: Front And Rear Panel View
Page 52/54 RS18 T ECHNICAL PECIFICATIONS 9.5.2 Front and Rear Panel view... -
Page 53: Rs18 Parts & Accessories List
GeoD Passive mode Crossover 80Hz NXAMP4x1 Power Digital TDController 4x1300W/2Ω NXAMP4x4 Power Digital TDController 4x4000W/2Ω 10.2 Accessories List MODEL DRAWING DESCRIPTION RST-BUMPER18 Main RS18 Bumper RST- Rigging plate (pair). FPLATES18 RST-WB18 RS18 Wheelboard (single unit) RST-DOLLY18 RS18 Dolly (3 RS18 max) -
Page 54: User Notes
Page 54/54 USER NOTES 11 USER NOTES France Nexo S.A. Parc d’Activité de la Dame Jeanne F-60128 PLAILLY Tel: +33 3 44 99 00 70 Fax: +33 3 44 99 00 30 E-mail: info@nexo.fr www.nexo-sa.com...
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