I had a buddy who used to have 4 tens and a fifteen in the back of his car, it provided both fast and deep sound, these speakers were all running off the same amp.... is this a bad thing to do..... I was thinking of running two eights and two tens in the back deck if I couldn't find a way to fit 4 tens back there.......... is this a bad thing to do. I'd be running them with a800 watt 2 ohm stable US amp so 200 per speaker continuous power. Would an 8, 10 combo be good, 4 10's , or simply two dvc tens. Please help.

 

Size does not matter. what you care about is the effective impedance of parallel'd speakers. If you hook up 4 subs that are 4ohms a piece, your effective impedance is 1 ohm! You'd better get a serious amp or it will fry! Either that or go choose drivers with higher impedance.