Moon, you should not need replacement parts. I have never heard a story of anyone having to replace a part unless they abused it. I have run a 1980 Yamaha integrated, a sub $400 sony av receiver, and now a $250 panasonic av receiver through mine and not had a problem. These are Klipsch products hand crafted in Hope, like your cornwalls. I bet you have not had to replace anything on your corns, have you?