I have a set of infinity Kappa Componets their about 2 years old. I rcently replaced my sub amp and been trying to retune things. one issue I never quite solved is almost no midbass. I used to have them un amped on my alpine CDA-9886 head unit. on there I seemed to have plenty of midbass. ever since amping them on my alpine 350 rms amp I lost midbass. I have some but it just seems lacking. I got rid of rear fill so I just run my Fi Q woofer and the componets. Any input? I think I maybe canceling out frequencies.