I hooked up my subwoofer ( sony sa-wm40) to my mini stereo system with speaker wires, and the effect was much better than with the rca cable. HOWever i can only hear the bass but can't feel it!!.....i have a tiled floor, is that the problem??....also with the sub, all i can hear is these deep rumbles, is that the desired effect??....because it gets annoying after a while....i was kinda expecting some tighter ( punch in the guts) feel to it.