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Message: <blockquote data-quote="Boomer14" data-source="post: 5875025" data-attributes="member: 609815"><p>I have an FI Audio 18 inch sub in my 93 mercury sable i have a 300 watt cerwin vega amp to the sub. When I turn the sub on from my stereo the sub starts to hit but as I turn up the volume the sub start to pulsate nonstop and i turn the sub off and it still pulsates on its own. I have checked the wires they are fine the fuses are fine. I was wondering if somone could help on figuring out why the sub is pulsating cause i cant even have it on any more with out it doing that?</p></blockquote><p></p>

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