N o i s e s W h i l e t h e E n g i n e i s O n o r O f f 
S y s t e m h i s s :
System hiss is a white noise that occurs even when the engine is off. It is usually due to excessively high gain settings. If the hiss is still audible when you disconnect the input cables from the amplifier, check the input level on the amplifier. If the hiss disappears when you remove the input cable, it may be a poor quality source unit, components between the amplifier and the source unit, or poor level settings.
D i s t o r t i o n :
Distortion is garbled sounding music. This can often be caused by a shorted speaker wire. Symptoms of this include no sound in one channel and severe distortion in the other. Use the following guide to help you find the source of distortion.
Is there audible distortion at all of the amplifier outputs?
NO
Check each side of the amplifier independently to see if the distortion is only on one channel. Is that the case?
YES
Try reducing the input level controls.
NO
Check for distortion in the signal path prior to the amplifier.
YES
Swap the output connection left to right. Check for shorted speaker wire. Did the problem switch sides?
NO
YES
Swap the input side |
| Check and/or replace | |||
left/right. Did the |
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distortion switch |
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sides? |
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NO
YES
Contact your dealer. | Check the source unit and | |
| components between the source | |
| unit and amplifier | |
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