Well it turns out that my center channel is not working on my AVR. Movie dialog always seemed lower than everyhting else but I realized this morning after testing a DVD I actually own and have watched before that there is a problem. I switched the jack to another speaker and have almost no sound, its not off completely but it's 25% of the volume of every other speaker. It's an HK 645, bought about 6 years ago, really not that much use on it, maybe 5 hours a week max, very disappointing for such an expensive unit. Anyone have any experience with having one serviced by HK?