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F R O N T P A N E L
1. LEVEL
Detented potentiometers with a dB-scaling to adjust the overall amplification of the power amplifier. These
controls should be set between 0 dB and –6 dB, depending on the output of the connected equipment –
e. g. a mixing console. The printed scale shows the actual amount of damping in the amplification of the
power amplifier.
2. LIMIT
This indicator lights when the amplifier enters clipping and the internal limiter is activated. Short-term
indication is problem-free. Anyway, if this indicator lights continuously, reducing the overall volume is
recommended to avoid that the connected loudspeaker systems are getting damaged from overload.
3. SIGNAL INDICATOR
This indicator lights when an output signal is present. In case of short-circuited speaker cabling or one of
the amplifier's protection functions is engaged the indicator is off, showing that there is no signal outputted.
4. PROTECT
If this indicator lights during operation, one of the amp's internal protection functions against thermal
overload, short-circuit, occurrence of HF or DC at the output ... has been engaged. The cause that let
the amplifier enter the protection mode – e. g. a short-circuited speaker cable – has to be eliminated. In
case of thermal overload you have to wait until the power amplifier returns into normal operation mode.
5. Power ON Indicator
This LED lights when the appliance's power switch has been engaged. If the indicator does not light after
you have engaged the power switch, either the amplifier is not connected to the mains or the internal
mains fuse is blown and has to be replaced.
6. POWER Switch
Using the POWER switch you turn the amplifiers power on. To eliminate unwanted noise and knacks in
the connected speaker systems, loudspeaker output switching is performed delayed via relays. An initial
current inrush limiter prevents the mains fuse from being blown during power-on.
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