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<blockquote data-quote="gijoe" data-source="post: 3524353" data-attributes="member: 574042"><p>I Just started getting some nasty alternator whine after installing my four channel amp.&nbsp; I have regrounded and reterminated both my sub amp and my four channel.&nbsp; I have also regrounded my head unit with 10 gauge wire to a non factory spot, I regrounded my ipod adapter to the same spot as the hu.&nbsp; I even grounded my rca&#039;s since I have a pioneer hu.&nbsp; After doing all of this, the noise isn&#039;t as lound, but I can still hear it if I turn the volume to 0.&nbsp; The noise increases with the engine, so i assume it&#039;s alternator whine, is there anything else it could be?&nbsp; The noise goes away when I disconnect either amp.&nbsp; There is no noise with just the sub amp on and there is also no noise with just the four channel.&nbsp; I have them grounded seperatly, about 4 inches apart.&nbsp; I took my dremel tool to the ground spot, so it&#039;s bare metal.&nbsp; I just can&#039;t seem to completly silence the noise.&nbsp; I have my rca&#039;s running down the opposite side from my power cable, but they mingle a little under my rear seat, before going into my trunk.&nbsp; Does anyone have any recommendations?&nbsp; I want to avoid a ground loop isolator if possible, but I&#039;ll do anything I have to to get rid of this horrible sound.&nbsp; Thanks!</p></blockquote><p></p>

[QUOTE="gijoe, post: 3524353, member: 574042"] I Just started getting some nasty alternator whine after installing my four channel amp. I have regrounded and reterminated both my sub amp and my four channel. I have also regrounded my head unit with 10 gauge wire to a non factory spot, I regrounded my ipod adapter to the same spot as the hu. I even grounded my rca's since I have a pioneer hu. After doing all of this, the noise isn't as lound, but I can still hear it if I turn the volume to 0. The noise increases with the engine, so i assume it's alternator whine, is there anything else it could be? The noise goes away when I disconnect either amp. There is no noise with just the sub amp on and there is also no noise with just the four channel. I have them grounded seperatly, about 4 inches apart. I took my dremel tool to the ground spot, so it's bare metal. I just can't seem to completly silence the noise. I have my rca's running down the opposite side from my power cable, but they mingle a little under my rear seat, before going into my trunk. Does anyone have any recommendations? I want to avoid a ground loop isolator if possible, but I'll do anything I have to to get rid of this horrible sound. Thanks! [/QUOTE]

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