Indication: CLIP LED flashing
If the red CLIP indicator flashes when signal is applied, the amplifier output may be shorted. Check the speaker wiring for stray strands or breaks in the insulation.
Indication: CLIP LEDs bright and steady The amplifier is in protective muting.
One second of muting is normal when the amp is turned on or off.
Overheating will cause protective muting. The fan will be running at full speed and the chassis will be hot to the touch; sound should resume within a minute as the amplifier cools to a safe operating temperature. Check for proper ventilation. If the fan isn’t running at all, the amplifier requires servicing.
Problem: Distorted Sound
Indication: CLIP LED flashing
If the red CLIP indicator flashes before the signal indicator does, the load impedance is abnormally low or shorted. Unplug each speaker
Indication: CLIP LED not flashing
This could be caused by a faulty speaker or loose connection. Check the wiring and try another speaker.
The signal source may be clipping. Keep the amplifier attenuation controls at mid point so that the source does not have to be overdriven.
Problem: No channel separation
Check the switch settings on the back of the amplifier. Make sure the “Parallel Input” and “Bridge Mode” switches are OFF in
Make sure other equipment in the signal path, such as mixers, preamps, etc., are set for stereo, not mono.
Problem: Hum
Move cabling and signal sources to identify “hot spots” in the system. Cables with faulty shielding are a frequent entry point for hum.
Problem: Hiss
Unplug the amplifier input to confirm that the hiss is coming from the source or a device upstream; erratic or popping noises indicate an electronic fault in the offending unit.
To keep the normal noise floor low, operate the primary signal source at full level, without clipping, and avoid boosting the signal further between the source and the amplifier.
Problem: Squeals and feedback
Microphone feedback should be controlled with mixer controls. If noise continues to build up with zero mic gain, there is a serious fault in the signal processors or cables. Working in succession from the signal source towards the amplifier, check each device in the signal path by reducing its gain or unplugging it.
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