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XLS Series Power Amplifi ers
Operation Manual
page 9
4 Operation
4.2   Front Panel Controls 
 and 
Indicators
A.  Cooling Vents
 
Front-to-rear forced airfl ow.
B.   Level Controls
 
Two black rotary level controls, one for 
each channel.
C.  Clip Indicators
 
Two red LEDs, one for each channel, illu-
minate when the channel’s output signal is 
being overdriven.
D.   Power Indicator
 
Green LED indicates amplifi er has been 
turned on and AC power is available. 
E.  Fault Indicator
 
Yellow LED illuminates when amplifi er is 
in protect mode. Also illuminates briefl y 
during normal power-up when amplifi er is 
fi rst switched on. 
F.   Power Switch
 
Amplifi er is on when the switch is in the 
UP position.
Figure 4.1 Front Panel Controls 
and Indicators