engine/eclectronics noise in subs
I installed my 2 12" kenwoods powered by a 1250W acoustix amp in my girlfriends car a while ago, and they've always had this hum to them which gets higher, and lower with the engine RPMs and with the use of power windows, etc. Which is what I assume is alternator noise?? I understand that this would normally mean that the power wire, and RCAs are crossed, but this is not the case. I wired them on the opposite sides of the car. I re-did the ground with seemed to help just a little. Is iut possible that I have a setting too high on the amp, or maybe there is some interferance that I'm looking past? Such as the RCAs crossing a wire that gives power the the power windows and such. Which doesn';t explain the hum caused by the engine. Also when the radio is turned on it gives a loud thump and then fades into the hum from the engine. When the car is not on there is no hum at all, unless a light is on. I'm not too electronic savy so this is tough to figure out. Everything I've searched says that the power and RCAs are crossed, but that simply isn' the case. Before they amp and subs were in her car they were in my jeep which I flipped, and could have possibly damaged the amp although it was secured to the seat, and did not move. Any help/tips are appreciated.
-1993 Grand Cherokee Laredo V8 5.2, Mopar CAI, Borla headers, Borla Y-pipe, Turn down exhaust, 4" RC SA, 33x12.50r15 BfGoodrich Km2, Crown extended brake lines, IRO Double Shear Track bar, IRO HD tie rod, Home made Quick discos, E-fan, Heavy duty harness/9007 bulb conversion, HP30 WJ knuckles lockrite solid cover.