AVSL 953.112 RM SERIES User Manual
Page 6
RM 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 “ON” LED will illuminate. Turn BASS and TREBLE controls to the 12 o’clock
position (pointing straight up) and turn the MASTER rotary control (5) up part way for testing.
Ensure a signal is being fed to one of the line inputs 2, 3, 4 or 5 and gradually increase the volume
control for that channel until the output is heard through the speakers. Turn up the MASTER to the
maximum required volume level and reduce the channel volume control if necessary.
Repeat this process for any other line inputs connected to channels 2, 3, 4 or 5.
Note: If a line input is not connected to a RM series mixer-amplifier, the initial test can be made
using the built-in USB/SD audio player. See section below for instructions.
Both the audio player output and LINE 5 input are governed by the LN5/USB volume control.
The output of the amplifier is represented on the VU meter LEDs (10) and care should be taken that
the Red “0” LED is only lit momentarily during use. Anything longer than a short flash of this LED
may be indicating distortion or clipping of the output signal and the MASTER should be turned down.
If a microphone is connected to MIC 1 input, make sure it is switched on and if it requires phantom
power, make sure this feature is enabled. Gradually increase the MIC 1 control (2) whilst speaking
into the microphone until the required volume level is reached. The microphone should not be able
to “hear” the speakers, which can cause feedback (squealing or howling noise).
Repeat this process for microphones connected via the MIC/LINE 2 and MIC/LINE 3 inputs.
If the VOX feature is enabled, audio playback through channels 4 and 5 will be reduced in volume
automatically when speaking into MIC 1.
In addition to channel and MASTER volume controls, there are BASS and TREBLE EQ controls to
adjust the tone of the overall output. At the 12 o’clock position, these controls are applying no effect
to the signal (no boost or cut).
Moving the BASS control clockwise boosts the low frequencies in the audio, whilst moving it
anticlockwise will cut these low frequencies.
Likewise, moving the TREBLE control clockwise boosts the high frequencies in the audio, whilst
moving it anticlockwise will cut these high frequencies.
Adjust these EQ controls to suit the type of audio signal or compensate for the room acoustics.