Bus Control And Muting; Mono Usage - B&K AV1230 User Manual

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Bus Control and Muting

The AV1230 is designed to provide Bus control for all amplifier channels. The Bus control allows for single
switching of the amplifier auto sense mute on/off feature on any pair of amplifier channels (1-2, 3-4, 5-6, 7-8,
9-10 or 11-12) with it's Dip Switch setting configured for Amp off and Sense off and the Bus Switch on. The
Bus control output is a pass through of the Bus control input for both signal and control. The control input cir-
cuit is designed to work as a Tip Pos. (+) and Ring Neg. (-) mono minijack connection. A control source capa-
ble of sourcing a minimum of 5 VDC @ 1 mA is recommended, and is compatible with up to 24V AC or DC.
(The Master control outputs DO NOT source any voltage directly, they only PASS through the input voltage at
their receptive inputs).
If more than one AV1230 or other units are to be controlled, the control signal can be expanded to include
each successive unit by simply running a 1/8" mini cable from the CTRL OUT connector of the first amplifier to
the CTRL IN connector of the next unit (commonly referred to as 'daisy chaining') with both a Local and Bus
control signal.
Note: When an 1/8" (3.5mm) mini plug is inserted into the Local amplifier pairs control input jack, the Bus
Control signal is automatically disabled for that amplifier pair.
Shown below is a two AV1230 system, including the Bus signal and control cabling.
*Note: A control voltage is for muting control only. Each amplifier must
be connected to its own source of AC power in order for it to operate.

Mono Usage

The AV1230 has the ability to have up to twelve output channels that may be mono. When the Mono Dip
Switch is enabled, the single signal from either the left or the right channel would be sent to both outputs. The
AV1230 has the ability to have up to 12 mono channels when using the bus section on the amplifier.
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