I happen to have a pair of rear subwoofers that work perfectly fine. I just replaced them with full range speakers as i re did my whole stero system and have a single 12in solo baric subwoofer the rear subs are kidna point less any way id be willin to let them go cheap. i wouldnt put the kickers back there as there sensitvity will be much lower them the oem. So they want be as loud.