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Message: <blockquote data-quote="woodydh" data-source="post: 489967" data-attributes="member: 553916"><p>I just finished installing the door and rear deck speakers and the sub.  I have 4 ga. power and ground running to a MTX 4405.  The ground is bolted to a bare metal surface under the seat.  The problem is, when the key is turned to acc. everything is fine, when you start the car, you get a nasty buzz sound out of the all the speakers except the sub.  I changed grounds twice, once on the seatbuckle bolt and now on the floor under the seat, I sanded the metal and bolted it down.  I have Monstercable RCA's with the ground on them and that is connected to a piece behind the dash.  I am totally lost, any help would be much appreciated!</p></blockquote><p></p>

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