Originally Posted by
Mr. Widget
Piano solos are excellent for finding damaged diaphragms. It is possible that one or more of your diaphragms have been replaced and the person replacing them didn't get one or more properly centered. Sometimes it is very difficult to do, and according to some of the professional reconers on our site some diaphragms simply won't fit right.
I'd suggest you remove the buzzing diaphragm and reinstall it following the guidelines posted here. You may have to some searches. It would be best if you could have someone experienced in this help you. Unfortunately those diaphragms have been discontinued so if the diaphragm is too warped or otherwise damaged, you may have a hard time replacing it.
Widget