I'm not sure where to ask this, but you seem as you may know better than most...

I had to replace the stock amp/unit in my car (98 Grand Prix GTP with the "premium sound package")

I replaced it with the Alpine MRV-F303, and it sounds like crap now, the highs and high-mids are fine, but the low end sounds like shite. It's a reduction in quality from the stock (which did sound pretty nice.) Originally it sounded *terrible*, until I realized that the dolt installers had the crossover on 100hz, cutting out all the lowend period.

1 Is the amp "allright", "decent", or "crap"?

2 Is there something I'm doing wrong (I set the Crossover off to 0 hz) or that they may have done wrong?

3 Anyone know what the "premium sound package" pontiac was using in 98 was? I had heard before that it had something to do with Bose, possibly the speakers, as the Headunit said AC-Delco on it.

Thanks!