oh and pyramid,legacy,pyle etc. they are all garbage if you go with anything look for Treo Engineering that's one of the best companies I have even heard, 1 Treo 15" running off 2 treo amps beat 4 JL W7's or w/ they're best subs are running off 4 JL 1000watt amps in a dbdrag etc. 1 15" running on 2 amps....need i say more