AUDAC SMA Series - Channel Controls and Power Switch

SMA&SMQ - User manual 011
Rear panel overview
SMA Series
SMQ350/500/750
SMQ1250
Channel selection buttons with indicator LED’s
Channel selection and monitoring is made easy through a selection button together with four indicator LED’s
for every channel. When pressing the button, the menu structure will call the settings of the corresponding
channel, allowing adjustment of the parameters.
The LED’s give a continuous indication of the operation of the corresponding channel. The green Signal LED
illuminates whenever a signal is present, while the -20dB LED illuminates when the input signal exceeds the -20
dBu level. The Clip LED illuminates when the corresponding channel is working at maximum level. To ensure
the best signal-to-noise ratio, the Clip LED may only illuminate at peak levels.
When the Clip LED illuminates, the output limiter of the amplier will intervene avoiding a distorted “Clipping”
sound on the output. The Protection LED will illuminate when overheating occurs, or any other fault is detected.
When the protection LED is illuminated, no signal will be available on the outputs.
When the volume for multiple outputs should change simultaneously, press and hold their channel selection
buttons for about 3 seconds. The desired channels will be simultaneously selected and volume change will
apply to all selected channels.
Power switch
A power switch is used to switch the amplier on and off, while the blue indicator LED located next to the button
illuminates when the power is switched on.