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Table of Contents
Related Manuals for Nexo Alpha M3
Summary of Contents for Nexo Alpha M3
- Page 1 ALPHA SERIES Alpha M3 & M8 Alpha Em & EF B1-18 & B1-15 S2 Sub-bass User Manual...
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Page 2: Table Of Contents
PAGE 2/37 INTRODUCTION INTRODUCTION ALPHA SERIES DESCRIPTION OUDSPEAKERS CONTROLLERS X-BOW FLYING SYSTEM GENERAL SET-UP INSTRUCTIONS PEAKER IRING LYING THE YSTEM CONTROLLERS SETTINGS NITIAL RECAUTIONS ALPHA ARRAYS - SOME BASIC RULES S2 P LPHA LACEMENT SPL V ERSUS REQUENCY SPL V ERSUS ISTANCE IRECTIVITY... -
Page 3: Introduction
The Mid-high EM forms part of the recently introduced Alpha E Series; its size and power- rating is smaller than that of the Alpha M3 & M8; the mid range is handled by an exponential horn loaded 10’’ driver, while the HF range is handled by a constant directivity horn loaded ceramic 2’’... -
Page 4: Nexo Tdcontrollers
"NX241 User Manual". You may also use one of the following analogue TDcontrollers that preceded the NX241. Please refer to the corresponding user manual or contact your NEXO agent for more information on these products. Sub TDcontroller for use with Alpha S2;... -
Page 5: General Set-Up Instructions
SPEAKON sockets are identified in/out and connected in parallel within the enclosures. A single 8-conductor cable carries all four bands required by the Alpha M3/B1/S2 system and the cabinet connectors allow all three types of cabinet to be safely linked at the loudspeaker end. (See Connections Diagrams at the end of this manual). -
Page 6: Flying The System
If long speaker cables must be used, ensure that they do not remain coiled while in use. Flying the System Alpha Series loudspeakers are equipped with steel anchor plates that can be fitted with NEXO X- BOW flying accessories. The X-BOW Flying Manual must be thoroughly read before flying the system. - Page 7 Ensure that the system is secure and prevented from pivoting about the motor hoist. Avoid any form of dynamic loading to the assembly. NEVER attach any item to the X-BOW other than the NEXO X-BOW accessories. When flying outdoor systems ensure that the system is not exposed to wind or snow loads and is protected from rainfall.
- Page 8 PAGE 8/37 GENERAL SET-UP INSTRUCTIONS Always survey the 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. X-BOW components should be used to stabilise ground stacks and to ensure that cabinets remain securely registered to each other.
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Page 9: Tdcontrollers Settings
All manuals & associated technical notes must be read before set-up. Please contact your NEXO agent for any literature inquiry. NX241 Digital TDcontroller The digital NEXO NX241 controller is able to drive the entire current Nexo range (PS & Alpha series). The following set-ups are supported (at the time of publication). Alpha Series ALPHATD B1+M3 Configure Input A to drive a 3-Way Alpha System. -
Page 10: Initial Set-Up Precautions
PAGE 10/37 GENERAL SET-UP INSTRUCTIONS Initial Set-up Precautions When running up a system particularly one which includes brand new cabinets for the first time the power should be increased slowly to approximately 50% and the system operated at this level for two hours. -
Page 11: Alpha Arrays - Some Basic Rules
Therefore, the gain will range from 0 to 3 dB per doubling; for n Alpha M3, M8, EM or EF: LGSPL(1kHz-10kHz) 10 log10(n) - Page 12 Some open-air applications might require loud level on a wide frequency range at a long distance. It is then recommended to stack a large number of Alpha M3/M8/EM vertically. Up to a determined distance - function of the frequency and the height of the stack -, the sound wave is cylindrical (3dB/2d);...
- Page 13 PAGE 13/37 ALPHA ARRAYS - SOME BASIC RULES Hygrometry and Temperature - Air Absorption Under usual conditions, air absorption increases when relative humidity decreases and increases when temperature decreases. Air absorption gives a linear attenuation, i.e. a constant value of loss of dB per meter: if 1 dB is lost from 10 to 20 meters, 2 dB will be lost from 20 to 40 meters, 4 dB from 40 to 80 meters and so on...
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Page 14: Directivity - Coverage
The Alpha series cabinets were designed to respect these two criteria. Particularly, the Alpha M3 features a constant coverage angle +/- 5° from as low as 800 Hz up to 12 kHz, with high values of dB loss / degrees at cut-off angle. - Page 15 Construction of large arrays derives from important SPL requirements rather than large listening angles: although the Alpha M3 is a high Q cabinet, 4 boxes are enough to cover a 140° horizontal plane. Therefore, large arrays will usually assemble cabinets at less than their nominal coverage angle.
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Page 16: Amplifiers
Amplifiers Power NEXO recommends high power amplifiers in all cases. Budget constraints are the only reason to select lower power amplifiers. 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 17: Gain Value
TDcontroller ("loudspeaker offset integration", "limiter", "compressor"...). These functions are not adapted to specific system requirements and may interfere with the complex protection algorithms used in the NX241. NEXO do not advise using other protection systems in conjunction with the NX241 and they should be disabled. -
Page 18: Passive Crossover Fuses
This fuse is located on the filter network, which is attached to the input panel of the following cabinets. Alpha M3/8 cabinets Alpha EM series cabinets Alpha EF series cabinets It is vital that this fuse is checked at regular service intervals and especially when replacing any loudspeaker components. -
Page 19: Technical Specifications
The X-BOW Flying Tracks can also receive standard Aircraft Flying Fittings. 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 20: Alpha B1-15 / B1-18
The X-BOW Flying Tracks can also receive standard Aircraft Flying Fittings. 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 21: Alpha M3 / M8
The X-BOW Flying Tracks can also receive standard Aircraft Flying Fittings. 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 22: Alpha Em / Ef
The X-BOW Flying Tracks can also receive standard Aircraft Flying Fittings. 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 23: Directivity Tables
15.5 20.0 23.3 24.5 26.5 30.8 34.3 36.0 38.0 38.8 39.8 40.0 41.5 41.5 40.8 42.0 NOTE : Those data are also available in electronic format. (EASE™ compatible) contact your NEXO agent. ALPHA SERIES USER MANUAL V1.0 DATE: 14/01/00 18:27... -
Page 24: Curves
PAGE 24/37 CURVES URVES Alpha S2 On Axis Response Alpha S2 With SubTD Controller (dB) Impedance Alpha S2 (Ohm) 10.000 -10.00 -20.00 -30.00 Figure 1: Frequency Response with Sub TDcontroller (dB) Figure 2: Impedance (Ohms) Alpha B1-18 On Axis Response Alpha B1-18 With AlphaETD Controller (dB) Impedance Alpha B1-18 (Ohm) 10.000 -10.00... -
Page 25: Alpha M3
PAGE 25/37 CURVES Alpha M3 On Axis Response Alpha M3 With AlphaTD Controller (dB) Impedance Alpha M3 (Ohm) 10.000 -10.00 -20.00 -30.00 Figure 7: Frequency Response with Alpha TDcontroller (dB) Figure 8: Impedance (Ohms) Black: MF, Grey: HF Directivity Index (dB) & Q Alpha M3 Coverage Angle Alpha M3 (Degree) 20.000... - Page 26 PAGE 26/37 CURVES Alpha M3 - Horizontal Directivity (5dB / div.) 0° 0° 0° 0° 330° 30° 330° 30° 330° 30° 330° 30° 300° 60° 300° 60° 300° 60° 300° 60° 200 Hz 250 Hz 315 Hz 400 Hz 270°...
- Page 27 PAGE 27/37 CURVES Alpha M3 – Vertical Directivity (5dB / div.) 0° 0° 0° 0° 330° 30° 330° 30° 330° 30° 330° 30° 300° 60° 300° 60° 300° 60° 300° 60° 200 Hz 250 Hz 315 Hz 400 Hz 270°...
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Page 28: Alpha M8
PAGE 28/37 CURVES Alpha M8 On Axis Response Alpha M8 With AlphaTD Controller (dB) Impedance Alpha M8 (Ohm) 10.000 -10.00 -20.00 -30.00 Figure 13: Frequency Response with Alpha TDcontroller (dB) Figure 14: Impedance (Ohms). Black: MF, Grey: HF Directivity Index (dB) & Q Alpha M8 Coverage Angle Alpha M8 (Degree) 20.000 15.000... - Page 29 PAGE 29/37 CURVES Alpha M8 – Horizontal Directivity (5dB / div.) 0° 0° 0° 0° 330° 30° 330° 30° 330° 30° 330° 30° 300° 60° 300° 60° 300° 60° 300° 60° 200 Hz 250 Hz 315 Hz 400 Hz 270° 90°...
- Page 30 PAGE 30/37 CURVES Alpha M8 Vertical Directivity (5dB / div.) 0° 0° 0° 0° 330° 30° 330° 30° 330° 30° 330° 30° 300° 60° 300° 60° 300° 60° 300° 60° 200 Hz 250 Hz 315 Hz 400 Hz 270° 90° 270°...
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Page 31: Alpha Em
PAGE 31/37 CURVES Alpha EM On Axis Response Alpha EM With AlphaETD Controller (dB) 10.000 Impedance Alpha EM (Ohm) -10.00 -20.00 -30.00 Figure 19: Frequency Response with AlphaE TDcontroller Figure 20: Impedance (Ohms) (dB) Directivity Index (dB) & Q Alpha EM Coverage Angle Alpha EM (Degree) 20.000 15.000... - Page 32 PAGE 32/37 CURVES Alpha EM – Horizontal Directivity (5dB / div.) 0° 0° 0° 0° 330° 30° 330° 30° 330° 30° 330° 30° 300° 60° 300° 60° 300° 60° 300° 60° 200 Hz 250 Hz 315 Hz 400 Hz 270° 90°...
- Page 33 PAGE 33/37 CURVES Alpha EM – Vertical Directivity (5dB / div.) 0° 0° 0° 0° 330° 30° 330° 30° 330° 30° 330° 30° 300° 60° 300° 60° 300° 60° 300° 60° 200 Hz 250 Hz 315 Hz 400 Hz 270° 90°...
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Page 34: Dimensions
PAGE34/37 DIMENSIONS IMENSIONS ALPHA SERIES USER MANUAL V1.0 DATE: 14/01/00 16:23... -
Page 35: Transport
PAGE 35/37 TRANSPORT RANSPORT ALPHA SERIES USER MANUAL V1.0 DATE: 14/01/00 16:23... -
Page 36: Connection Diagrams
PAGE36/37 CONNECTION DIAGRAMS Connection Diagrams SP4 CABLE SP4 CABLE SP4 CABLE SP4 CABLE ALPHA SERIES USER MANUAL V1.0 DATE: 14/01/00 16:23... - Page 37 PAGE 37/37 CONNECTION DIAGRAMS ALPHA SERIES USER MANUAL V1.0 DATE: 14/01/00 18:27...
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Page 38: Quick Reference Guide
Alpha TDcontroller Quick reference guide (Full user manual is coming soon !) Read before use The Alpha TDcontroller is designed to be used with the Alpha M4 and Alpha B1 speaker cabinets. Its main functions are : To optimize the response of the system To split the signal into 3 frequency bands (LF, MF &... - Page 39 Error! Style not defined. ___________________________________________________________________________________________________ In the « Wideband » position the cabinet is exploited to its maximum capacity. This position should be used if the system is used in the 3WAY mode. It can also be used along with the Alpha S2 Subbass, and in that case there will be a boost in the cross over area.
- Page 40 Error! Style not defined. _________________________________________________________________________________________________ III. Rear Panel III.1. Audio Inputs Signal is applied between pins 2 and 3, pin 1 being grounded. As a result of the balanced nature of the outputs (and providing that balancing is respected by way of the connection to the amplifier), there is no hot or cold pin - the TDcontroller being neutral regarding the polarity of the signal.
- Page 41 Error! Style not defined. ___________________________________________________________________________________________________ III.8. Mains Socket WARNING : This appliance must be earthed. The socket is compatible with mains supply flexible cords which comply with IEC Publication 227. IV. Functions requiring the opening of the TDcontroller IV.1. Enhanced protection trimmers The embedded trimmers (Red wheel) are used to change the thresholds of the protection system.
- Page 42 Tel: +33 1 48 63 19 14 Fax: +33 1 48 63 24 61 Email: info@nexo.fr FAR EAST NEXO USA Inc. NEXO limited NEXO Far East Ltd 2165 Francisco Blvd. 9 Lyon Road 101 Lorong, 23 Geyland Suite E2 Walton-on-Thames...
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