I have 2 sony 12's a 760w sony amp, eclipse head unit, and infinity door speakers. I a about to put 2 infinity speakers where the other 2 rear speakers go.

My question is do i need another amp to push my highs to make them more clear. i can turn my sub control down and hear them fine but if I go over 8 on the sub control you can forget it.

 

Rear fill is just that....rear fill. You should concentrate on your front stage, have most of the music coming from the front. I wouldn't power the rear speakers with an aftermarket amp...just my .02

 

Ok i will just replace them then just to be away from factory.

 

Replace them or take them out.