CM/CS Series User Manual
Operation
When all connections to the amplifier are made, turn all rotary controls down and switch on the
power (11) and a power LED will illuminate.
Ensure a signal is being fed to the LINE IN connection and gradually increase the MASTER rotary
control (5) part way for testing.
For CM mixer-amplifiers, increase the LINE IN rotary (3) until the output is heard through the
speakers. Turn up the MASTER to the maximum required volume level and reduce the LINE IN
control if necessary.
Note: If a line input is not connected to a CM series mixer-amplifier, the initial test can be made
using the built-in USB/SD audio player.
See “USB/SD audio player“ section below for instructions.
If a microphone is connected, make sure it is switched on and gradually increase the MIC control (2)
whilst speaking into the microphone until the required volume level is reached.
Note: The microphone should not be able to “hear” the speakers, which can cause feedback
(squealing or howling noise).
Fog/Siren/Alert buttons
In addition to audio controls, the CM60 front panel has 3 warning sound buttons. Pressing any of
these will issue one of 3 preset warning sounds through the speakers.
Powering down
After use, turn down rotary level controls before disconnecting input leads.
To avoid loud pops through the speakers, turn down the MASTER control before powering down.
