So, not to long ago i bought a Fusion 4000D from SPLDave. So, didn't have the system to hook it up for a few months, never got around to it. About a month ago I finally got it in, and i start having major issues. It would play, but once you hit a high volume, the subs went into spaz mode. I don't know how else to describe this. The subs just...went nuts.
So i call Sampson (footlongsam) for some help. He takes the amp, replaces a few fets, throws it in his car, and its loud as hell. Great!
We put it back into my truck, same problem. Turn the volume up, subs go crazy and pump furiously.
It has GOT to be the headunit. It just doesn't make since because when I took out my last system it was fine, and i went around with no tunes at all for like 3 months. Adn i bought the HU (Alpine 9884) BRAND NEW in july of last year. I just want some other opinions on what it might be. I've heard a lot of people say it has to be the ground, Sam looked at it and said it was fine, and i'm running 2 Optima G31 YT's in the back, so i don't think my electrical is the problem either.
Help? PLEASSEEE!??