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<blockquote data-quote="D-C" data-source="post: 1441455" data-attributes="member: 565030">Hi all.&nbsp; I&#039;m having a tough time getting rid of some noise in the system.&nbsp; Seems like a ground loop, and it&#039;s pretty independant of engine RPM.&nbsp; If I plug in RCAs, that&#039;s when it happens- a little bit with the first amp, and a bunch more when I plug in the second amp.&nbsp; It goes away as soon as the amps are powered down.The HU is grounded to the chassis in the front, the amps are grounded to the same spot near them in the chassis at the back.&nbsp; Both are ground down to metal.&nbsp; I also have an additional ground strap from the cab to the frame rail.&nbsp; This is all on a 2001 GMC pickup by the way.&nbsp; No other electrical system mods (big 3 etc.) have been done.So anyway, I&#039;m not sure what to try next;&nbsp; any ideas would be appreciated.&nbsp; I&#039;m hoping I just missed something.Thanks!P.S.&nbsp; one thing I forgpt to mention- my rear factory speakers are still hooked up to the HU&#039;s stock amp/stock harness if that matters.</blockquote>

[QUOTE="D-C, post: 1441455, member: 565030"] Hi all. I'm having a tough time getting rid of some noise in the system. Seems like a ground loop, and it's pretty independant of engine RPM. If I plug in RCAs, that's when it happens- a little bit with the first amp, and a bunch more when I plug in the second amp. It goes away as soon as the amps are powered down. The HU is grounded to the chassis in the front, the amps are grounded to the same spot near them in the chassis at the back. Both are ground down to metal. I also have an additional ground strap from the cab to the frame rail. This is all on a 2001 GMC pickup by the way. No other electrical system mods (big 3 etc.) have been done. So anyway, I'm not sure what to try next; any ideas would be appreciated. I'm hoping I just missed something. Thanks! P.S. one thing I forgpt to mention- my rear factory speakers are still hooked up to the HU's stock amp/stock harness if that matters. [/QUOTE]

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