I have found some head units when fitted in a corsa pick up and put back out interferance like that... but it comes in2 it thru all 3 power connections. So you need to run it to its own (clean) earth, its own positive feed from the batt and then use a relay (use the old ign live to switch it) for the ign live. Only SOME head units will pick it up tho, i've had 2 previous ones which didnt then the 3rd one did. After connecting it to "clean" power sources/earth it was perfect.
I have seen different amplifiers pick up interferance where others havent tho, is it a JBL GT 755.6 by any chance?

got phonos down one side and power down the ther side.

got supressors on headunit.

i get the reving noise coming through the speakers.

It could be absolutely anything. Does it happen with the engine on and off or just on?

If it happens on both, then i advise you fit an interference suppressor to your headunit, around £7.

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Originally posted by gmsosolid
just put 6 channel amp in car running 6x9s, components and sub, got interferance from engine when i rev it, and indicator noise aswell,

any ideas, would it be coming through the 3 phono leads i am running down the car

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just put 6 channel amp in car running 6x9s, components and sub, got interferance from engine when i rev it, and indicator noise aswell,

any ideas, would it be coming through the 3 phono leads i am running down the car