Public Address System
8-Channal PA Amplifier
5
2.
Description of Front Panel
Note: On front panel, there are 8 independent control boards, which correspond to 8 PA output channels on back panel,
including the control over the PA volume, tone and power switch state.
Take the first channel as example to illustrate the functions of control board.
Output volume knob
①
Rotate clockwise to increase the volume and counterclockwise to
decrease the volume. The volume is factory adjusted to the
minimum.
Bass kno
②
b
Rotate clockwise to enhance the bass effect and counterclockwise to
attenuate the bass effect. The bass effect is factory adjusted to
medium position.
③
Treble knob
Rotate clockwise to enhance the treble effect and counterclockwise
to attenuate the treble effect. The treble effect is factory adjusted to
medium position.
Channel power
④
switch
It is used to control the power state of this channel, without
affecting other channels.
Power indicator
⑤
This indicator is bright when the power of this channel is switched on.
Output electric level indicator
⑥
This indicator is bright when there is output signal and the electric level reaches a specific value.
Distortion
⑦
indicator
This indicator is bright when the output electric level exceeds the rated value (100V for this machine).
Notes: When this indicator lights up, please adjust the volume knob to decrease the output electric level,
until this indicator is dark.
1-8 Channel PA Control Panel
