We just got an RCA Home Theater system, nothing fancy, but of course, I need a class to set it up with everything else. I have an lg hdtv, a hopper and a premier that have been hooked up together just fine. If I want to watch the tivo (which I only use for digital local channels and netflix), I just switch the input. I believe I have the tv and hopper directly connected via hdmi and then the tivo also connected to the tv via hdmi. I connected the home theater to the tv via hdmi but the sound only comes through one speaker. I'm not sure what my next step is.