Hi Guys, i have a clarion head unit, i just replaced the front speakers with infinity reference 6022i and would like to replace the rear aswell. i would like more bass without having to get an amp. should i just put another set of infinity's in the rear or go with something like a kicker ssmb6 6.5" midbass driver/subwoofer?? Would a midbass driver really give better base and would it be safe to run off of just a head unit?? I dont have the funding for an amp but maybe in a couple years. Any suggestions would help..thanx...