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  1. 01-30-2006 #1
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    engine whine through back speakers

    Ok i have a pioneer 4600mp H/U and since i install my 4 channel amp im getting engine whine through rear speakers only. I replace the rca cable for the rear with some expensive shielded ones and still the same problem and i even ran it over the seat away from any power cables still the same problem. Is it a problem wid my H/U.... ?



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  3. 01-30-2006 #2
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    Re: engine whine through back speakers

    check your grounds(HU and amp)



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  4. 01-30-2006 #3
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    Re: engine whine through back speakers

    Yeah, try redoing your HU and amplifier grounds.



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  5. 01-30-2006 #4
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    Re: engine whine through back speakers

    I check all the grounds plus the whine is only audible through the rear speakers not the components at all. but ill double check.



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