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Message: <blockquote data-quote="Matt8896" data-source="post: 8895079" data-attributes="member: 693372"><p>i have multiple issues i’m wondering if it’s a ground loop issue. my subwoofer is making a rumbling sound but it’s not a steady rumble it goes up and down with only output to speaker hooked up. all speakers also have a constant static even when rca are disconnected. vehicle is 2023 gmc terrain using stock head unit and a t harness i ordered online. i’ve been scratching my head for months not sure where to start.</p></blockquote><p></p>

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