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Message: <blockquote data-quote="terra" data-source="post: 4771231" data-attributes="member: 559497"><p>New symptom...When I turn off the car, the sub makes a low sound. it plays a low volume..30ish hz note. Goes for maybe 3 seconds. Then stops. I checked the back ground and some of the heatshrink had some off allowing the metal to touch the frame. I took it off, cleaned to ground more and then rewrapped it in elec. tape and regrounded it. Idle voltage went up to 13.4 but driving voltage wont go above 13.6. The sub still does the same thing. I have 3 back batteries. Amp has 2 grounds on the Deka and the Kinetik is the one that actually grounds to the car. Amp is the Fusion FCA4000D.</p></blockquote><p></p>

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