User manual BIAMP IWA250

[. . . ] CAUTION: These installation instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. IWA 250 In-Wall Powered Mixer Installation Instructions Biamp Systems | 9300 S. W. Gemini Drive | Beaverton, OR | 97008 | USA | +1. 503. 641. 7287 | www. biamp. com blank 5Jul06 IWA 250 TABLE OF CONTENTS Front Panel Features Installation Remote Control Applications Specifications & Block Diagram Warranty pg. 12 INTRODUCTION The IWA 250 In-Wall Powered Mixer provides an 8 input/2 output mixer plus emergency page interrupt, a 9-band graphic equalizer, and a 250 Watt power amplifier with outputs for standard and distributed speaker systems. [. . . ] Main Equalizer: This 9-band graphic equalizer adjusts the frequency response (tonal balance) of signals sent to the Main Amplifier. Each control provides ±15dB boost/cut at the designated center frequency. From the factory, the Main Equalizer receives signal from the mixer Main Out. Cables should route through appropriate conduit, raceway, or service entrance cable fitting. Mount the backbox with the internal cable tray assembly located on the right side. The "IWB" can be mounted between standard 16" center studs, using the six mounting holes on each side of the box. The "SMB" can be mounted onto standard 16" center studs, using the four outer-most "keyhole" slots, or onto other suitable surfaces, using the six inner-most "keyhole" slots. Wire Routing: Wiring that carries signals of dramatically different voltages must be separated by as much distance as possible. Microphone and line level wiring should never be run with loudspeaker or power wiring. To reduce the potential of crosstalk or oscillations that could damage the amplifier, never bundle the microphone and line level cables with loudspeaker or power cables. It is recommended that all loudspeaker wiring enter the backbox at the upper right "knock-out", and route through the cable tray. It is recommended that wiring for the microphone and line inputs should enter the backbox at the lower right "knock-out", and route under the bottom edge of the chassis. The microphone and line level inputs require shielded wire for proper operation. Loudspeaker wire should be of a heavy gauge, to prevent cable losses from degrading the system capabilities. Cable runs using 14 gauge wire should not exceed 90 feet (for 8 ohm operation) or 45 feet (for 4 ohm operation). Longer cable lengths require heavier gauge cable (smaller wire number). Constant voltage outputs (70V and 25V) can tolerate lighter gauge cables or longer cable runs (check an appropriate line loss chart for specific application requirements). NOTE: AC power should enter the backbox at the bottom left "knock-out" (a standard AC duplex outlet, with enclosure and cover, is provided). For proper system grounding, the duplex outlet ground, enclosure, backbox, and conduit or raceway must be bonded together and connected to earth ground. For safety and conformance to codes, this bonding of all metal surfaces should be performed by a qualified electrician during installation of the backbox. Back-Box Grounding: 1) 2) 3) 4) The back-box must be electrically bonded to the ground conductor of the incoming power cable. Ground to the box should be bonded to the stud provided in the cable tray inside the back-box. [. . . ] Once Override Input settings are made, Override Sensitivity may be adjusted for proper muting sensitivity. Override Sensitivity should be adjusted so that muting is easily triggered by Override Input (paging) signals, but not by ambient or background noises on the paging line. The Override Input Active indicator will remain lit during muting. 8 CH 8 -12V +12V +10V GND OUT IN -12V +12V +10V GND OUT IN -12V +12V +10V GND OUT IN -12V +12V +10V GND OUT IN CH 7 CH 6 CH 5 CH 4 -12V +12V +10V GND OUT IN CH 3 -12V +12V +10V GND OUT IN CH 2 CH 1 -12V +12V +10V GND OUT IN -12V +12V +10V GND OUT IN REMOTE CONTROL MAX MIN Mixer Circuit Board OVERRIDE SENSITIVITY MAIN AUX 9 IN OUT GND +10V +12V -12V IN OUT GND +10V +12V -12V APPLICATIONS 250 Watt Distributed System plus Hearing Assistance & Recording Outputs IWA 250 channels 1 aux 2 aux 3 aux 4 aux 5 aux 6 aux 7 aux 8 aux +15 C UL R power US LISTED 52SJ 120V~ 60Hz 900 Watts main equalizer +15 max Main Amp. output min max min max min max min max min max min max min max min main main main main main main main main -15 -15 63 min max min max min max min max min max min max min max min max 125 250 500 1k 2k 4k 8k 16k high high high high high high high high IWA 250 Powered Mixer -15 +15 -15 +15 -15 +15 -15 +15 -15 +15 -15 +15 -15 +15 -15 +15 HPF OFF ON AUTO MANUAL OVERRIDE low low low low low low low low aux -15 +15 -15 +15 -15 +15 -15 +15 -15 +15 -15 +15 -15 +15 -15 +15 min max gain gain gain gain gain gain L / R Sum OFF OFF ON ON 20dB Pad OFF OFF 20dB Pad L / R Sum ON ON main aux out main out line mic line mic line mic line mic line mic line mic min max min max min max peak peak peak peak peak peak peak peak active peak S LR LR common main EQ in main out 1 2 3 4 inputs 5 6 7 8 override input aux out main out Phantom Power tape playback OFF OFF Phantom Power microphones OFF OFF Phantom Power OFF OFF Main distributed speaker system COMPACT 1 DIGITAL AUDIO 2:50 CD player mic preamp paging microphone tape recorder hearing assistance system 10 APPLICATIONS 250 Watt Distributed System plus Remote Control & Auxiliary Speaker System IWA 250 channels 1 aux 2 aux 3 aux 4 aux 5 aux 6 aux 7 aux 8 aux +15 C UL R power US LISTED 52SJ 120V~ 60Hz 900 Watts main equalizer +15 max Main Amp. 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