Thank you everyone! That was quick. I will try tightening and see if that helps. Didn't think about looking for foam debris. I'll do that too. I also found checked out the CarverAudio site. That will be my possible solution if the suggestions don't work. First step is to make sure I have non-ferrous screwdrivers.
Right now, the AL-III's are playing some Dylan and I don't hear the buzz. Of course I'm in the other room or maybe Dylan's buzz is canceling out the speakers. Hmm.... that might be a short term fix. Listen from another room and only play Dylan.
These speakers are my 2nd pair of Carvers AL III. I bought them used and I thought they were fine until I started playing some classical piano pieces. My originals, which I use in our HT setup are AL-III+ are doing fine. The two sets of speakers do sound different. The +'s are cleaner in the low end. Not sure if that means the III's are in need of a cross-over tweak or not. Of course, the amp and preamps are different between the two systems and the rooms are completely different.