Subwoofer out of whack and "alternator whine"?

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roninryu8

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So i've researched here and other sites for the answer but I just want to make sure. My subwoofer and amp have worked fine for the past few months, then out of nowhere I get the "alternator whine" sound. And my subwoofer doesn't bump to the music, sometimes it's a constant "boommmmmmmmmmmmmmmm" sound. Even if I have the volume down to 0. I checked the ground, that's not the problem. Which leads me to believe my RCA cable is out of whack, because I removed the negative RCA from the back of my subwoofer and it stopped the whine and constant boom. The sub still kicks a little, because it's still getting power, but not that extra "umph" since I disconnected the RCA.
So before I go out to purchase another RCA cable, I just wanted to make sure that's what the problem is. Thanks.
 
It's unusual for a cable to just go bad - unless somebody messed with it. Sounds more like an amp problem - a filter capacitor has died amongst other things.
 
if your pushing your sub too hard it could be a problem and the alternator can not hold power anymore. I would try to keep your sub at a lower level for a while and see how it does. If the noise goes away then you know you cant push it that hard. Otherwise I would check the cables and make sure they are not spliced or getting frayed. Take it to your local car audio place and have them diagnose it and ask how much it will be.
 
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