User manual BIAMP EQ 282-281

[. . . ] Optional VCA remote control cards may be added for controlling mixer input/output levels. Designed for in-wall or surface mounting, with integral security cover, the EQ 282-281 is UL/C-UL listed and is covered by a five-year warranty. · · · · · · · · · · · · · · · · · six balanced microphone/line level mixer input channels two balanced/summing line level mixer input channels high & low tone controls on each mixer input channel independent main & aux level controls on each channel trim control & peak indicator on each mic/line input channel additional balanced line input for emergency page interrupt main & aux mixer outputs with master level controls mixer functions provided on screw-driver adjustable controls optional VCA cards for remote control of input/output levels 9-band graphic equalization integrated at amplifier input patch points provided for mixer outputs & equalizer input mixer inputs & outputs on front panel plug-in barrier strips output taps for standard and distributed speaker systems +48 Volt phantom power selectable for microphone inputs "in-wall" or "surface-mount" chassis with security cover UL and C-UL listed covered by Biamp Systems' five-year warranty IMPORTANT SAFETY INFORMATION Read these instructions. WARNING - To reduce the risk of electric shock, do not expose this apparatus to rain or moisture. [. . . ] From the factory, a jumper wire between "Main Out" and "Main EQ In" routes signal from the Main Out control to the Main Equalizer and the Main Amplifier. Signal processing may be inserted between the mixer and the equalizer by first removing the jumper wire, then wiring "Main Out" to processor input and "main EQ In" to processor 3 output, using a common ground ( ). To access unbalanced Main Out from the mixer (to feed recorders, auxiliary amps, etc. ) wire high to "Main Out" and ground to ( ), without removing the jumper wire. NOTE: If the jumper is removed, the main output and equalizer input are separated (no signal passes between them). Aux Out: The Aux Out screw-driver control sets the overall level of signals sent (from channel Aux controls) to the Aux Out connector. 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. 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. Grounding shall be made with minimum #18 AWG wire, preferably green in color. Grounding shall be in accordance with NEC and all applicable wiring codes. Safety Ground: This symbol identifies the appropriate back-box grounding stud, located on the lower portion of the cable tray at the bottom right of the back-box. 4 INSTALLATION IWB (In Wall Box) SMB (Surface Mount 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. 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. Mounting hardware for the security cover must be installed before proceeding (see below). Install the two speed nuts (provided with chassis) in the holes on the left side-rail of the backbox, directly across from the hinges. Two tapping screws with washers (provided with chassis) install through the holes in the left side of the chassis front panel (into the speed nuts) to secure the chassis to the backbox. Security Cover Installation: Before the chassis front panel is secured to the backbox, mounting hardware for the security cover must be installed. [. . . ] NOTE: When a VCA Card is installed, but no control is connected, signal will not pass. To avoid this circumstance, a jumper wire may be temporarily connected between "+10V" and "C". Additionally, if VCA Cards are removed, jumper wires must be reinstalled between OUT and IN on the respective channels/outputs of the mixer circuit board, before signal can pass. C +10V VCA card Override Sensitivity: The IWA 250 Override Input can trigger muting of all other input signals automatically (see Override Input on pg. For automatic muting (as from telephone paging), an Override Sensitivity adjustment should be made (see diagram on next page). [. . . ]