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Message: <blockquote data-quote="pbnj22" data-source="post: 7848354" data-attributes="member: 595845">I have had a sub and mono amp hooked up for a while and doing fine. This weekend i hooked up a 4 channel amp to the stock speakers since it was laying around and now im getting a low bass like crackle noise with car on then when i start engine the noise gets higher pitched, more of a buzz and changes with engine rev.-I never had this problem with sub so i cant imagine its the head unit or its ground..-My rcas are on the opposite side of power wire, they cross once at a 90 degree angle and its through the carpet..-My amp ground is same bolt as sub amp and its a good one...anything else to check? would swapping rcas with my sub amp help to eliminate bad rcas?could it be just a shltty amp?</blockquote>

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