B&K 220M - Manual (Page 8)

Page 6 13005 rev 0004
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If the control function is desired, each unit in the system must remain connected at all
times and the control must be enabled. To enable the control function, the CTRL
ENABLE button must be out for each controllable amplifier in the system. For more
information on the amplifiers output status under various control conditions, refer to the
table below.
@ CTRL IN Button position Output status @ CTRL OUT
Signal OUT Sound Signal
Signal IN Sound Signal
No Signal OUT Mute No Signal
No Signal IN Sound Signal
*Note: The 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.
Level controls
The level controls are an option that can be added to the amplifier. If your amplifier has
this option, the balanced inputs are not present.
You can not have level controls and
balanced inputs on an amplifier.
There is one level control on the back of the amplifier.
When using the level controls, first start with them turned all the way up (clockwise).
Then adjust them according to your system requirements to match the sound level
coming from each speaker.