I have some Ruark Epilogue R bookshelf speakers as surrounds. I used to use them as mains and they are fantastic hifi speakers. About 2 months ago I auditioned an Audiolab power amp using just them and it sounded great but of late, I've got the feeling that the surround element in my system was severly muffled, especially noticable on multi channel SACD. I felt it may be the rear channels of my AX5i at fault. A short while ago I was trying a power amp that turned out to be faulty and one of the speakers (only one I think) emmited a loud buzz when I turned the amp on. This evening I hooked them up to the front left and right terminals of the AX5 to try them as stereo speakers and they sounded dreadful, all boxed in and muffled. Both exhibited this behavoir. They are definately nowhere near how they used to be. So, have I damaged them in some way? What would happen if I had blown the tweeters? If I have, what's my best course of action? I it possible to get hold of the parts myself? Also, is it possible that spending a lot of idle time as surrounds has somehow caused them to 'ceaze up'? I discounted this one but have an open mind.