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First, what does the noise sound like?
Does it change with engine speed?
Is it there when the engine is off?
Does it change with components turned on and off? (ie:fan, etc)
Do you have power wires running parallel with signal wires? Or bundled together?
try unplugging the RCA's to each component (seperately) and see what happens.
Try disconnecting power to each amp seperately and the 'puter.
Ground loops are a real PITA sometimes, you just have to keep chasing it..........
Good luck
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For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
Leonardo Da Vinci
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