Control Muting - B&K EX4420 Owner's Manual

Control muting
A control is provided on each EX4420 amplifier to allow remote switching of
mute on/off. The preamplifier's control output, such as is provided with B&K
AVP series preamplifiers, can be utilized to provide a control signal to the
EX4420. If more than one amplifier is being controlled, the control signal
can be extended to include each successive unit by simply running an RCA
type audio 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'). An example of how to connect two amplifiers is illustrated below.
If a source other than a B&K AVP series preamplifier is used to control
multiple amplifiers, only the control output voltage from the source is critical.
It must be within the range, as indicated on the rear panel, 5-24 volts DC is
required. The amplifier will provide each successive amplifier with a control
voltage of 12 volts DC for reliable operation. The amplifiers control output
may be used as a source of 12 VDC @ 125 mA for other user applications
as well.
Range of 5-24 VDC from source
Control enable button
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