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.
blank 5Jul06
IWA 250 TABLE OF CONTENTS Front Panel Features pg. 2 Installation pg. 4 Remote Control pg. 8 Applications pg. 10 Specifications & Block Diagram 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. Optional VCA remote control cards may be added for controlling mixer input/output levels.
FRONT PANEL FEATURES channels 1 2 3 4 5 6 7 8 aux aux aux aux aux aux aux aux C UL R power ~ 120V 60Hz 900 Watts US LISTED 52SJ main equalizer +15 max min max min main max min main max min main max min main max min main max min main main +15 max min main -15 -15 63 max min max min high max min high max min high max min high max min high max min high 250 500 1k 2k 4k 8k 16k max min high 125 high IWA 250 Powered Mixer +12 -12
FRONT PANEL FEATURES output, using a common ground (d). To access unbalanced Main Out from the mixer (to feed recorders, auxiliary amps, etc.) wire high to "Main Out" and ground to (d), without removing the jumper wire. NOTE: If the jumper is removed, the main output and equalizer input are separated (no signal passes between them). Remote level control is optional (see pg. 8). Inputs (Channels 1~6): These plug-in barrier strips provide mic/line input to Channels 1~6.
INSTALLATION Backbox Installation: Backboxes are available for mounting the IWA 250 chassis in the wall, flush with the finished wall surface ("IWB" In Wall Box), or for mounting on the surface of the wall, with a 4" projection ("SMB" - Surface Mount Box). The mounting location should be capable of supporting a weight of at least 75 pounds. Surface mounted units ("SMB") should be located near a dedicated AC power source, capable of providing the required power for the unit being installed.
INSTALLATION SMB (Surface Mount Box) IWB (In Wall Box) 5
INSTALLATION Chassis Installation: The chassis front panel includes two male hinges, which must be secured to the right side-rail of the backbox (use the screws, lock-washers, and nuts provided). Be sure to install the male hinges with the pin pointing up and towards the inside of the backbox. The chassis front panel (with two female hinges on its right side) is then lowered onto the male hinges. This allows the chassis to swing open for access to internal connections, modifications, and for servicing.
INSTALLATION Loudspeaker Wiring: Model IWA 250 provides a single 250 Watt amplifier (Main). To help offset the inductance of certain speaker matching transformers, the IWA 250 includes a high-pass filter (see pg. 3), which must be enabled whenever the 70V or 25V outputs are being used. Loudspeaker wiring is connected to the screw-terminal block on the amplifier/power supply circuit board, located inside the chassis front panel, at the upper left-hand corner.
REMOTE CONTROL Remote Control: Remote level control is available as a user installed option. It can be added selectively to any of the Input Channels 1~8, as well as to the Main Out and the Aux Out. Remote control capability is added by installing VCA Cards onto the mixer circuit board (see diagram on next page). CAUTION: Turn off and/or dis-connect AC power before performing any modifications.
REMOTE CONTROL IN OUT GND +10V +12V -12V MAX MIN OVERRIDE SENSITIVITY AUX IN OUT GND +10V +12V -12V MAIN -12V +12V +10V GND OUT IN CH 8 -12V +12V +10V GND OUT IN CH 7 -12V +12V +10V GND OUT IN CH 6 -12V +12V +10V GND OUT IN CH 5 -12V +12V +10V GND OUT IN CH 4 -12V +12V +10V GND OUT IN CH 3 -12V +12V +10V GND OUT IN CH 2 -12V +12V +10V GND OUT IN CH 1 Mixer Circuit Board 9
APPLICATIONS 250 Watt Distributed System plus Hearing Assistance & Recording Outputs IWA 250 channels 1 2 3 4 5 6 7 8 aux aux aux aux aux aux aux aux C UL R power ~ 120V 60Hz 900 Watts US LISTED 52SJ Main Amp.
APPLICATIONS 250 Watt Distributed System plus Remote Control & Auxiliary Speaker System IWA 250 channels 1 2 3 4 5 6 7 8 aux aux aux aux aux aux aux aux C UL R power ~ 120V 60Hz 900 Watts US LISTED 52SJ Main Amp.
SPECIFICATIONS & BLOCK DIAGRAM Continuous Power (4 ohm direct & transformer outputs): Equalization: 250 watts Signal-to-Noise Ratio (20Hz~20kHz): referenced to 250 watts into 4 ohm direct output > 90dB Total Harmonic Distortion: low-frequency input channel EQ ±12dB @ 50Hz high-frequency input channel EQ ±12dB @ 10kHz ±15dB @ 64Hz, 125Hz, 250Hz, 9-band graphic output EQ 20Hz~20kHz @ 250 watts into 4 ohm direct output < 0.2% 100Hz~15kHz @ 250 watts at transformer outputs < 1.
WARRANTY BIAMP SYSTEMS IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL 1. BIAMP Systems warrants to the original purchaser of new products that the product will be free from defects in material and workmanship for a period of 5 YEARS from the date of purchase from an authorized BIAMP Systems dealer, subject to the terms and conditions set forth below. 2.
