Hi. I have a problem that just started over the weekend. Here's my seyup-
Pioneer DEH-P3900MP head unit
Polk mmc6500 front components (125 rms)
MB quart rvf 216 back components (140 rms)
Kicker zx650.4 4 channel amp, 120 watts rms per channel at 4 ohms.
Ok. Had this stuff pro installed, for about 2 months now. All of a sudden, I start getting loud crackling noises. It occurs very randomly, and it relatively high volume (around 30 on my dial). The volume on my head unit goes up to 50, and I never crank it above 40. 30 gets plenty loud without any distortion, all the way up til 40~45. The gains should be set correctly for a kicker amp. Last week something slipped in my trunk and turned the gain up to max on the back set (nor the fronts), but that shouldn't be a big issue considering the power ratings, and it wasn't like that for too long.
Anyway, everything should be set right with nothing pushed beyond its comfortable limits, so there shouldn't be anything blown. When I get this crackling noise, it comes on when I have music on about 30 (and I usually have it about that level anyway). When I turn down the volume below 20, it seems to go away. I've tried to isolate where it might be coming from. The last time it started crackling, I faded the speakers all the way to the right side of the car, because it sounded as if it was coming from my left speakers (probably because they are closest). I faded all the way to the right while the crackling was going on at high volume, and I still heard the noise seemingly from the left, even though the left speakers should have been producing almost no sound at that point. So either something is really f'ed up with one side, or it applies to all of them. It's hard for me to isolate it, because it doesn't occur in any sort of pattern.
I'm thinking maybe it's a crappy ground or something? I really hope it isn't a blown speaker. It def doesn't sound like the noise my OEM speakers made when their paper cones had ripped from the frame. This really does sound electrical, almost as like when you have a loose wire/electrical connection. Any ideas?