Im doing the same thing you are trying, but i have satellite. I just hooked up my sat. feed from the dish to the outside line in (outside of trailer) like the cable hookup. I then ran the cable in to my sat reciever at the entertainment center, then to the TV like you would at home. when i want surround for say, CMT. or a good movie, i turn the volume down on the TV and then turn on the concertone to the AUX mode, you have to turn it up to about 20 or so to start to hear it, but IT WORKS !!