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Message: <blockquote data-quote="southwest713" data-source="post: 5474534" data-attributes="member: 558293">ok so i hooked up a sub and small amp in a friends car(08 accord).8g power and ground. power straight to battery. grounded at a solid spot, sanded off and using star washers. remote wire to fuse box switched power source.using factory radio and hooked up the loc directly to the rear speakers in the trunk.now theres this "thud" sound from the sub when accelerating. it does it and then stops, so it's not a continuous  sound. i tried a different loc, tried a different spot for the ground, also tried using the high level inputs on the amp, but the problem is still there. i disconnected the rca's and hooked up my ipod to try a different source, and it played fine, so i dont think it's the amp. i've installed many, many set-ups but never had this issue before. any ideas on what it may be?</blockquote>

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