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Message: <blockquote data-quote="awalbert88" data-source="post: 317579" data-attributes="member: 545461">Well, a bad ground wouldn't introduce clipping - just noise.  Are your gains set correctly?  It's possible that the HU is sending a clipped signal, but Alpine makes some pretty good decks, so that seems unlikely.  Is it only the sub that clips, or do your other speakers do this as well?  Are your other speakers amped seperately or via the HU?Try switching your sub amp to a different set of RCA outs from the HU and see if that makes a difference.  Also make sure all equalization/bass boost settings on the HU are disabled.</blockquote>

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