You'd need one hellacious power supply to acomplish that(100 amp+), one that would probably cost you upwards of 3 or 4 hundred bucks. You'd be better off buying a home amp that could better take advantage of the copious amount of power avaiable in your wall outlet.
i was thinking of a (i live in australia) 240 volt to 12-14 votl adaptor what do u reckon about that??
Large and in charge
I know a dude who had a "car" system in his dorm in college. His car was totaled and he just used a 120v to 12vdc converter. Powered the amp and wired the remote in through a switch. Worked great. Medium sized box with a pair of Alpine 6x9s, Alpine CD H/U and some decent 100x2 amp to push it. Portable stereo. I wouldn't recommend doing subs unless you have a BIG converter that will handle that kind of current.