Hello everyone, I just got a free subwoofer. It is an AudioSource SW380 Subwoofer that is part of a surround sound set, but all I have is the sub. Assuming I can find the correct 12v AC adaptor for it, how can I use this sub with my macbook pro? I want to buy some better stereo speakers and have a kick-a bass, but I don't want to ruin the bass by playing the lows and highs. Any suggestions?