Thank you for your response, and do apreciate your imput. my plan was to hook up both Quartets to the center chanel.I felt that only one would tend to shift the sound to one side. Trey from klipsch also responded and suggested that my carrier needed to be able to function at 4 ohms or else this could be damaged.COULDNT FIND ANY INFO ON ADCOM GPT600 but I am quite certain that it should be able to take 4 ohmsdoug the reference to the surround is well taken the match on the fronts I am happy with but the surround are quite sparce so I think going to have to beef these up thank s for your responce.