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Message: <blockquote data-quote="rebel842001" data-source="post: 1178189" data-attributes="member: 18161"><p>I hooked the speaker out from the headunit into the speaker wires on the harness kit green to green purple to purple white to white and gray to gray like any other headunit install ive done before, but ive never done any work on the mach system.  I hooked the connector with the rca plugs into the sub output on the headunit. im getting good sound out of it. It actually sounds better than the stock headunit to me, sounds a lot cleaner at higher volumes.  Its just at the lower volumes I can hear that damn extremely loud fuel pump sound. It only does it when the engine is running. It does not do it with the key turned back to Acc. or even turned to on with out the engine running, but soon as you crank it and the headunit boots back up there the interference is.</p></blockquote><p></p>