Should be able to bridge 2 of the channels on the sony to get 120 watt rms out of it.... but it wont be enought to run the sub properly, look at some of the jaycar range or look on shopping secure site from the main page of the forum (he sells good gear and may do you a deal if you mention your from the forum) get a monoblock if possible. Also when setting up the amp set it to low pass filter and make sure you have it set low enough, will filter all but the bass out.
"I realize you were young and inexperienced at the time, but in hindsight you should have chosen your parents more wisely."