Noise interference help.

[adzapog]

Hey guys i could do with some help/advice! The problem i'm having is I'm getting really bad noise inerference coming from the speakers when the engine is running, the interference changes pitch with the revs.
I don't think it's coming from the head unit as the rear speakers run off of this and when the amp is switched off there is no interference therefore i'm guessing it's coming from the amp. I have checked all the earths and power connections and these are fine. I read in the trouble shooting section for the amp a power capacitor can cure this type of noise issue? or is there anyhing else you can put on the power lead to reduce interference?

Any help or advice would be great!

 

[Blighty]

I was gona say bad earth. No paint around the earth? My mate tried everything and it turned out it was the headunit. Sorry i'm not much help.

 

[adzapog]

Just been searching the forum and it appears it's a common issue with pioneer head units.

 

[Blighty]

Yea my mates was a Pioneer. I've never had any issues with my Pioneer HU's though. I love them!

 

[wallop]

If its a blown 'Earth Track', (common Pioneer issue), the interference will be present at all times whether the engine is running or not....

Alternator Whine can be caused by a number of issues, search for threads started by me, I think I covered it a while back...

EDIT; Searched myself, couldn't locate so done new thread....