You connect your home theater in a box directly to the tv using HDMI cable and not to the cable box. You also need to connect an optical cable from the back of the tv to your home theater to hear the tv sound. Keep in mind that only those tv program with the Dolby digital logo will have surround sound information, the rest are in stereo. You home theater will be in surround sound when you play a blu ray disc or dvd movies, CD and radio (if equipped will be in stereo only. Hope this will help you out.