Directed Electronics 225A 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 t e m h i s s

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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

 

the speaker that is

distortion switch

 

distorting.

sides?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

YES

Contact your dealer.

Check the source unit and

 

components between the source

 

unit and amplifier

 

14

 

 

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