What are all of the possible ways to connect and power a subwoofer for my home theater? My place is pre-wired, but no is sure where or what wires have been run. I do know that there are the 6 surround speaker wires present. Where the TV mounts there is a Cat-5 cable, pair of speaker wires, and the component connections. Is it possible to connect the subwoofer with the above configuration? Please help!