So I buy a house in havasu............it has speakers in every room with individual controls. The prior owner had his speakers hooked up to his TV via cable and played music off of Direct TV. So.....I want to hook up my stereo to the speakers........but there is only a cable line coming out of the wall.....how do I convert the cable line to speaker line? There are two cable type hookups......one is for TV and I'm assuming the other is for the speakers.