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<blockquote data-quote="Frankensuby" data-source="post: 2463047" data-attributes="member: 569869">Hmm... I&#039;d say1.buy a set of RCA&#039;s from Wal-mart or something, and just run them through the cabin to wherever your amp is.&nbsp; Make sure not to get the RCA near the power wire2. If noise is still present, swap out the amp for someone elses.&nbsp; Doesn&#039;t matter the power output, just as long as it can get loud enough to hear the noise.3. If that does not work, try swapping out the Head Unit for another.&nbsp; At this point it leads to either ground loop isolation or the Head unit.4. If the new HU swap does not eliminate this issue, buy a ground loop isolator from Wal-mart.&nbsp; Plug it in and see if this eliminates the noise.Remember, use the new RCA for each setup atleast.&nbsp; Just to be safe.Does the noise follow the RPM of the engine?&nbsp; I.E.- you rev it and it gains pitch with the RPMS?If so, it could be the RCA Pre-Outs on your Head unit.&nbsp; I have had this issue on 2 decks now, both are Pioneers.The first example was an Older Pioneer, which are known for their noise.&nbsp; I bought 2 sets of RCA Ground Loop isolators and it helped alot.The newest issue was an injury I inflicted myself.&nbsp; I roasted the RCA Pr-outs because a ground came loose on an amp I was tuning, and it found a new ground through the RCA&#039;s.&nbsp; Pioneers fix for the old Pioneer noise issue was a form of fuse that protected and eliminated the noise in the RCA pre-outs.&nbsp; I blew that fuse up //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif&nbsp; The Unit is the new line DEH-6800, a great unit...when not messed up by said owner :lol:Hope this may clear some things up for you.</blockquote>

[QUOTE="Frankensuby, post: 2463047, member: 569869"] Hmm... I'd say 1.buy a set of RCA's from Wal-mart or something, and just run them through the cabin to wherever your amp is. Make sure not to get the RCA near the power wire 2. If noise is still present, swap out the amp for someone elses. Doesn't matter the power output, just as long as it can get loud enough to hear the noise. 3. If that does not work, try swapping out the Head Unit for another. At this point it leads to either ground loop isolation or the Head unit. 4. If the new HU swap does not eliminate this issue, buy a ground loop isolator from Wal-mart. Plug it in and see if this eliminates the noise. Remember, use the new RCA for each setup atleast. Just to be safe. Does the noise follow the RPM of the engine? I.E.- you rev it and it gains pitch with the RPMS? If so, it could be the RCA Pre-Outs on your Head unit. I have had this issue on 2 decks now, both are Pioneers. The first example was an Older Pioneer, which are known for their noise. I bought 2 sets of RCA Ground Loop isolators and it helped alot. The newest issue was an injury I inflicted myself. I roasted the RCA Pr-outs because a ground came loose on an amp I was tuning, and it found a new ground through the RCA's. Pioneers fix for the old Pioneer noise issue was a form of fuse that protected and eliminated the noise in the RCA pre-outs. I blew that fuse up [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] The Unit is the new line DEH-6800, a great unit...when not messed up by said owner :lol: Hope this may clear some things up for you. [/QUOTE]

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