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. [. . . ] The Aux Out connector is a plug-in barrier strip, which provides a balanced line-level output for feeding external equipment (recorders, auxiliary amplifiers, etc. ). For unbalanced output, wire high to (+) and ground to ( ), leaving () un-connected. Remote level control is optional (see pg. HPF: This DIP switch enables a high-pass filter (12dB/octave @ 125Hz) which reduces unnecessary low-frequency signals. Enable HPF whenever the 70V or 25V outputs are being used, or in any 'speech only' applications. Override: This DIP switch determines whether the Override Input will trigger muting of all other input signals automatically (via signal presence) or manually (via external switch). 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). [. . . ] 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. 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 Main distributed speaker system 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 Phantom Power Phantom Power Auxiliary distributed speaker system tape playback RP-L2 OFF OFF microphones OFF OFF OFF OFF optional VCA remote control cards installed RP-L2 Microphones Tape / CD COMPACT 1 DIGITAL AUDIO 2:50 CD player RP-L2 Main Out telephone paging RP-L2 Aux Out MPA250 MPA250 on signal peak temp fault 11 SPECIFICATIONS & BLOCK DIAGRAM Continuous Power (4 ohm direct & transformer outputs): Signal-to-Noise Ratio (20Hz~20kHz): referenced to 250 watts into 4 ohm direct output Total Harmonic Distortion: 20Hz~20kHz @ 250 watts into 4 ohm direct output 100Hz~15kHz @ 250 watts at transformer outputs Intermodulation Distortion (SMPTE): Frequency Response (20Hz~20kHz): Input / Output Impedance: balanced mic/line inputs balanced line-level inputs unbalanced main & aux outputs unbalanced equalizer input 250 watts Equalization: low-frequency input channel EQ ±12dB @ 50Hz ±12dB @ 10kHz ±15dB @ 64Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz, 16kHz Dimensions (H x W x D): security cover in-wall back-box surface-mount back-box 28. 6" x 16. 25" x 0. 9" (726x413x23mm) 26. 6" x 14. 25" x 4" (676x362x102mm) 28. 6" x 16. 25" x 4" (726x413x102mm) > 90dB high-frequency input channel EQ 9-band graphic output EQ < 0. 2% < 1. 0% < 0. 35% +0/-1dB 600 ohms 20k ohms 200 ohms 10k ohms Weight: chassis + security cover in-wall back-box surface-mount back-box < 34 lbs. (7. 71kg) IWA250 block diagram Input Channels 1 thru 6 Peak LED + GND Main Level Phantom Power Preamp/ Gain High & Low EQ Opt. VCA Aux Level Main Output Section Main Out 9-band Graphic EQ 8 Ohms 70V 25V Com Input Channels 7 & 8 Peak LED Main Level Phantom Power Preamp/ Pad High & Low EQ Opt. [. . . ]