GEO S Series S805 5° Tangent Array Module S830 30° Tangent Array Module CD12 HyperCardoid Subbass User Manual GEO S8 SERIES USER MANUAL V1.
P.2 PLEASE READ CAREFULLY BEFORE PROCEEDING GEO is new technology The 3 year GEO R&D Project has generated the following patent applications: • The GEO Hyperboloid Reflective Wavesource™ works on a different principle from the coercive megaphone-variant horns you know and love/hate. If you apply “tried and true” methods to this entirely different species of waveguide, the results are likely to be very different from what you expect. • The Configurable Directivity Device.
PLEASE READ CAREFULLY BEFORE PROCEEDING P.3 PLEASE READ CAREFULLY BEFORE PROCEEDING BASIC PRECAUTIONS Do not open the speaker system or attempt to disassemble the internal parts or modify them in any way. The speaker system contains no user-serviceable parts. If it should appear to be malfunctioning or damaged, discontinue use immediately and have it inspected by qualified NEXO service personnel.
P.4 PLEASE READ CAREFULLY BEFORE PROCEEDING SAFETY INSTRUCTIONS FOR NEXO TD CONTROLLERS NEXO ANALOGUE PSTDCONTROLLERS, 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. 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.
PLEASE READ CAREFULLY BEFORE PROCEEDING P.5 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. The U.S.
P.6 TABLE OF CONTENTS TABLE OF CONTENTS PLEASE READ CAREFULLY BEFORE PROCEEDING ................................................................................. 3 TABLE OF CONTENTS..................................................................................................................................... 6 INTRODUCTION .....................................................................................................................................................
INTRODUCTION P.7 INTRODUCTION Thank you for selecting NEXO GEO S8 Series products. This manual is intended to provide you with necessary and useful information about your GEO System, which includes the following products: • S805 5° Tangent Array Module. 8” (20cm) Neodymium Hi-flux 16 Ohm LF Driver and 1” Throat Neodymium HF Driver on a 5° Hyperboloid Reflective Wavesource. Your main building block for curved vertical tangent arrays; integral precision array assembly system.
P.8 GENERAL SET-UP INSTRUCTIONS GENERAL SET-UP INSTRUCTIONS Speaker Wiring The loudspeakers are connected to power amplifiers via NL4FC SPEAKON connectors (not supplied). A wiring diagram is printed on the connection panel located on the back of each cabinet. The in/out pins of the SPEAKON sockets are identified. The sockets are connected in parallel within the enclosures (see the Connections Diagrams section of this manual).
GENERAL SET-UP INSTRUCTIONS P.9 Amplifier Selection Power GEO S8 Series array elements are rated for 500 Watts power handling. Although each array element has a 16 Ohm nominal impedance, NEXO recommends that you connect no more than six S8 Series array elements to a single amplifier channel. The amplifiers used for this application should be capable of delivering 1500 to 3000 Watts into a low impedance (typically specified as 2 Ohm) load.
P.10 GENERAL SET-UP INSTRUCTIONS Some examples: Gain 20dB 26dB 32dB 37dB (1.4V sensitivity / 1350Wrms) 0.1V 1V 2V 4V 7.1V 0.5V 5V 10V 20V 35.4V 1V 10V 20V 40V 70.8V Vin Remember that constant sensitivity settings will give a different gain value when the amplifier power is different. Gain value NEXO recommends low gain amplifiers: +26dB is recommended, as it is at the same time adequately low and quite common amongst amplifier manufacturers.
NX242 DIGITAL TDCONTROLLER SETTINGS P.11 NX242 DIGITAL TDCONTROLLER SETTINGS The GEO S8 Series cabinets will not perform correctly without the NX242 TDcontroller. Sound quality and reliability are totally dependent on the correct use of the NX242 TDcontroller, in accordance with the instructions provided in this manual and in the NX242 User Manual. All manuals & associated technical notes must be read before set-up. Please contact your NEXO agent for any literature you may need.
P.12 NX242 DIGITAL TDCONTROLLER SETTINGS S805 9-16 boxes CD12 Flown Mono Setup. Input A. Output 1 (back driver of the CD12), Output 2 (front driver of the CD12), Output 3 (GEO), no signal on Output 4. Configure GEO S805 (9-16 boxes) with CD12 flown. GEO Horizontal Tangent Arrays Input/Output Assignments: GEO S8 Series Wideband Configurations (No Sub) Input A Input B Left Right Output 4 HF Output 3 HF Output 2 LF Output 1 Sub Left Right No Signal No Signal S830 3 boxes No Sub Stereo Setup.
NX242 DIGITAL TDCONTROLLER SETTINGS P.13 Delays & System Alignment The NX242 internal time adjustments (factory presets) have been optimised to provide the best crossover possible between the MAIN and SUB systems. The reference point for this adjustment is the front side of each cabinet. (That means that the internal delays are set for a S8 cabinet standing close to the CD12, with both front sides being aligned).
P.14 DEPLOYING GEO TANGENT ARRAYS DEPLOYING GEO TANGENT ARRAYS Vertical vs. Horizontal One of the advantages of the GEO S8 Series is the ability to construct coherent vertical and horizontal arrays from the appropriate GEO Tangent Array Modules. These two types of arrays are very different in their behaviour and intended applications.
NS-1 SIMULATION SOFTWARE P.15 NS-1 SIMULATION SOFTWARE NS-1 software is a R&D simulation tool derived application. It processes measured speaker data with complex mathematical algorithms to assist the user in optimizing system design. Due to the complexity of the interaction of multiple cabinets, it is simply not possible to reliably design curved vertical arrays without using the processing power of a computer to predict the optimum array structure for a given audience geometry.
P.16 USING THE CONFIGURABLE DIRECTIVITY DEVICE USING THE CONFIGURABLE DIRECTIVITY DEVICE The GEO Wavesource controls dispersion of acoustic energy using an hyperboloid acoustical reflector in the “coupling plane” (the vertical plane of a curved vertical tangent array) and a diffraction slot in the “non-coupling plane” (the horizontal plane of a curved vertical tangent array). The patent-pending Configurable Directivity Device consists of bolt-on flanges that alter the diffraction slot’s exit flare rate.
USING THE CONFIGURABLE DIRECTIVITY DEVICE P.17 When & where to use Configurable Directivity flanges The diagram below can be considered as a plan view of the audience area shown in Figure 1. Instead of looking through the sidewall, we are looking through the ceiling. While the GEO cluster will deliver even SPL from the front to the rear of this audience area, there are “holes” near the front in the centre and at the outside edges.
P.18 GEO APPLICATION GUIDELINES GEO APPLICATION GUIDELINES GEO is a highly adaptable and flexible system due to the unique performance factors of the patent-pending Hyperboloid Reflective Wavesource, the Configurable Directivity Device flanges and other innovations. However, like all tools, your GEO system has been designed to function in specific ways: these lend themselves to many situations, but not all. When designing and deploying GEO arrays, keep the following considerations in mind.
GEO TANGENT ARRAY RIGGING SYSTEM P.19 GEO TANGENT ARRAY RIGGING SYSTEM Before proceeding with assembly of GEOS / CD12 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. SAFETY FIRST GEO S8 / CD12 Rigging System has been approved by Certification Organization RWTÜV. Structural computations, test reports, certificates are available in NS-1 or at Nexo (info@nexo.fr) upon request.
P.20 GEO TANGENT ARRAY RIGGING SYSTEM • Never leave the system unattended during the installation process. • Do not place any object, no matter how small or light, on top of the system during the installation procedure. The object may fall when the system is flown and is likely to cause injury. • Motor or hoist secondary safety steels must be installed once the system has been flown to the operating height.
GEO TANGENT ARRAY RIGGING SYSTEM P.21 Contacts Correct training is fundamental to safe practise when working with loudspeakers flying systems. NEXO recommend that users contact local industry associations for information on specialist course.
P.22 GEO TANGENT ARRAY RIGGING SYSTEM Angle-setting bar Angles between cabinets are set using the force of gravity The angle setting pivots on the hole marked 1. For all angles up to and including 17.5°, use the oblong hole on the unattached end of the bar (A). This allows you to set the angles of the array while the cabinets are lying flat on the ground. When the array is lifted into position each cabinet will fall automatically into the proper angle.
GEO TANGENT ARRAY RIGGING SYSTEM P.23 After having positioned the top enclosure, insert the pins into the front and rear attachment points and lock them with R clips (see picture). The bumper’s rear mounting point should be connect to the hole marked “LIFT” on the GEO Angle Adjustment Plate. NOTE: The top GEO enclosure is always parallel to the bumper.
P.24 GEO TANGENT ARRAY RIGGING SYSTEM Extension Bar Figure 7 Figure 8 The GEO Bumper has two lift points, which are adequate for many situations. The extension bar is designed for those applications where the bumper’s lift points are too close together to allow setting the proper tilt angle for the entire array. With 16 GEO cabinets, a vertical GEO array can be tilted ±15°. NOTE: Always use an inclinometer and/or a laser aiming device to verify that the array has the tilt angle specified in NS-1.
GEO TANGENT ARRAY RIGGING SYSTEM P.25 Combination GEO/CD12 bumper It is possible to make a single bumper by using the connecting bar to join the GEO bumper and the CD12 bumper. The cluster will then consist of: • The GEO enclosures, attached to the GEO bumper • The CD12 enclosures, attached to the CD12 bumper directly behind the GEO array • The connecting bar which joins the entire array assembly together.
P.26 GEO TANGENT ARRAY RIGGING SYSTEM Assembling Horizontal GEO Arrays Horizontal GEO arrays are composed exclusively of GEO S830 loudspeakers. In this configuration, it is imperative that the cabinets are “tight packed,” that is arrayed at 30° splay angles, matching the trapezoidal sides of the GEO S830 enclosures. This ensures that the wavefronts are truly tangent and combine without destructive interference.
GEO TANGENT ARRAY RIGGING SYSTEM Dimensions & Weights GEOS-BUMPER Weight 11kg / 24.25 lbs CD12-BUMPER Weight 15kg / 33 lbs Link BAR (CD12-LINKBAR) Weight 9kg /19.8 lbs GEO/CD12 Extension BAR (EXBAR-S) Weight 4kg / 8.8 lbs P.
P.28 TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS GEO S805 SYSTEM SPECIFICATIONS GEO S805 with NX242 TDcontroller Frequency Response [a] 67 Hz – 19 kHz ± 3 dB Usable Range @-6dB [a] 60 Hz – 20 kHz Sensitivity 1W @ 1m [b] 99 dB SPL Nominal -97 dB SPL Wideband Peak SPL @ 1m [b] 125 to 128 dB Peak for a single cabinet. Configuration dependant when arrayed. Dispersion [c] Directivity Index [c] Coupling Plane: Not useable as a single cabinet.
TECHNICAL SPECIFICATIONS P.29 GEO S805 curves ON AXIS RESPONSE (dB) IMPEDANCE (Ohms) 10 64 0 32 −10 16 −20 −30 30 100 1k 10k 20k On Axis response in dB. From dark to light: set up ‘wide range’, ‘CD12 stacked’ and ‘CD12 flown’. 8 30 100 1k 10k 20k Impedance in Ohms OFF AXIS RESPONSE Flange 80° (dB) THD + N (%) 10 10% 0 1% −10 −20 100 1k 10k 20k 0.1% 100 1k 10k 20k Total harmonic distortion + noise in percentage. Level = 110dB @ 1m.
P.30 TECHNICAL SPECIFICATIONS GEO S830 SYSTEM SPECIFICATIONS GEO S830 with NX242 TDcontroller Frequency Response [a] 67 Hz – 19 kHz ± 3 dB Usable Range @-6dB [a] 60 Hz – 20 kHz Sensitivity 1W @ 1m [b] 99 dB SPL Nominal -97 dB SPL Wideband Peak SPL @ 1m [b] 125 to 128 dB Peak for a single cabinet. Configuration dependant when arrayed Dispersion [c] Directivity Index [c] Coupling Plane: 30° for a single cabinet. Configuration dependant Non-coupling plane: 120° (configurable to 80°).
TECHNICAL SPECIFICATIONS P.31 GEO S830 curves ON AXIS RESPONSE (dB) IMPEDANCE (Ohms) 10 64 0 32 −10 16 −20 −30 30 100 1k 10k 8 20k On Axis response in dB. From dark to light: set up ‘wide range’, ‘CD12 stacked’ and ‘CD12 flown’. 30 100 1k 10k 20k Impedance in Ohms. OFF AXIS RESPONSE Flange 80° (dB) THD + N (%) 10 10% 0 1% −10 −20 100 1k 10k 20k 0.1% 100 1k 10k 20k Total harmonic distortion + noise in percentage. Level = 110dB @ 1m.
P.32 TECHNICAL SPECIFICATIONS GEO CD12 SYSTEM SPECIFICATIONS CD12 with NX242 TDcontroller Frequency Response [a] 42 Hz – 200 Hz ± 3 dB Usable Range @-6dB [a] 39 Hz – 250 Hz Sensitivity 1W @ 1m [b] 102 dB SPL Nominal Peak SPL @ 1m [b] 131 to 134 dB Peak (500 to 1200W RMS Amp) Dispersion [c] Directivity Index [c] Hypercardiod pattern 120° x 120° over the entire useable bandwidth.
TECHNICAL SPECIFICATIONS P.33 CD12 curves ONAXIS RESPONSE (dB) 63 Hz 40 Hz 10 0 30 0 30 330 60 330 60 300 300 0 90 270 90 270 10 240 120 20 210 150 30 100 200 240 120 IMPEDANCE (Ohms) 180 Horizontal (dark) and vertical (light) polar plot. 3dB/division. 100 Hz 32 0 30 210 150 180 On-axis response in dB. Maximum Bandwidth. Actual bandwidth depends from NX242 settings 330 16 60 300 8 90 270 4 30 100 200 240 120 Impedance in Ohms.
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