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Message: <blockquote data-quote="terra" data-source="post: 4773086" data-attributes="member: 559497"><p>Voltage is now up at 14.5. I think the back bank got drained because of the bad ground and it just needed time to recharge. however, the sub still makes a low noise when I turn it off. i can wait for like 30 seconds and then a really low frequency sound comes from it. Amp is grounded to another batt than the one that grounds to the car. That a problem?</p></blockquote><p></p>

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