Troubleshooting
1. Problem: no sound
Indication: Status LED not lights
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Check AC plug.
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Make sure the amplifier is switched on .
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Check mains fuse.
Indication: Status LED lights, -20dB LED not lights, Signal LED not lights
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Make sure the signal source is operating and try another cable.
Indication: Status LED lights, -20dB LED not lights, Signal LED lights
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Check position of Volume p ots.
Indication: Status LED lights, Signal LED and -20dB LED respo nding to signal level
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Check the speaker wiring for br eaks.
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Try another speaker cable.
2. Problem: no channel seperatio n
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Make sure other equi pment in the signal path such as mixers and preamps are set for
stereo not mono.
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Make sure the amplifier is set to ster eo operation. (see “Presets” on p age 12)
3. Problem: distorted sound
Indication: Status LED lights, Signal LED responding to sign al level, Peak LED not lights
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A faulty speaker or loose connection could cause this. Try another speaker and check
the wiring.
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The signal sour ce might be clipping. Keep the input gain at least at -10 dB so that the
source does not have to be over driven.
4. Problem: Hiss
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Unplug the amplifier input to confirm that the hiss is coming from the source or from a
device upstream. Erratic or popping noises indicate an electronic fault in the offending
unit.
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Kee p the noise floor low, operate the primar y sign al source at full level without
clipping.
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Avoid boosting the signal further between the source and the amplifier.
5. Problem: Squeals and Feedbacks
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Microphone feedback should be controlled with mixer controls. If noise continues to
bui ld with no microphone gain, there’s a serious fault in the signal processors or
cables. Work in succession from the signal source towards the amplifier and check
each device in the signal path by reducing its gain or by unplugging it.