ok, so heres whats up. the factory alpine stereo in my xj8 sounds really good. but the little 5 1/4" in the doors really aren't makin much happen for lows. I was just wondering what a good sub amp combo wold be for it. I have about .75 ft for a sealed box, and the sub is going to be in the car not the trunk so it has to be really clear. it would be great if it got pretty loud, but its gotta be real clear. any input would be greatly appreciated!