Subwoofer problem...PLEASE HELP!!

[TurboDreamzGST]

Hey guys, i recently installed my JL Audio W7 into my car....at first i was having a problem that when i would turn off my head unit or turn on the lights inside my car, the subwoofer would make a loud thump and i came to find that my ground from my amp was bad so i fixed that problem but i was still having another problem before that, and the ground wasn't the source of the problem. What happens is when I hit the "next" or "previous" button on my head unit to change the song, the sub makes a low thumping noise when i hit those buttons. I changed the RCA wires and still didn't help. I have my RCAs and my remote wire on one side of the car and my power wire on the other side of the car. Can anyone tell me what the problem is please or give me some suggestions to help?? thanks!

 

[LordZed]

OH yeah? dry rotted? Didnt even think that can happen. Exposed to elements? Perhaps when washed, bc it is in an enclosed box next to the washer fluid reservoir. Being in a garage? Yes I tried not using it much in the winter. I would drive it when there wasnt snow on the ground.

Ok I'm kinda confused by this response. It sound's like your talking about the speaker box AND the car. I just ment the speaker itself. Like perhaps it sat in your garage for a year before you installed it. Or the person you purchased it from let it bake in the sun and it messed up the rubber.