Here is a little problem I am trying to resolve. When I changed to my 4351's I moved them to the other side of the room. My son and I moved my entire audio stack by slipping some slick coasters underneath and pushing it from the bottom so very little was disconnected. I decided to play some of my vinyl and when I turned the volume up the woofs started to motorboat, needless to say I shut it down and tried to figure out the problem, so far it has escaped me. The stereo works fine on tuner and CD but not the Technics SL1200 which BTW always worked fine before. Anybody have any ideas?