My SVS subwoofer arrived today, and I was about to hook it up to my pre-wired family room. I pulled out the wires in the wall.... found 6 lines labeling FR, FL, C, RR, RL, and SW. Pretty straight forward, except that the SW line (subwoofer I assumed) is not like the other 5 lines. I mean it doesn't even look like speaker wires. It's a coaxial line, similar to cable TV, or DirecTV line. I thought they might have mixed up the lines, but there already is a coaxial line close by, and connecting to the TV. Could this coaxial line be connected to a subwoofer or did the home builder screwed me? It's an SVS PS1-ISD subwoofer by the way. Thanks.