I don't think I ever overdrove the speaker. My guess is there was a problem in some of the drivers in the shipped in a batch of CC-370's.

My local Paradigm dealer took care of the tweeter replacement on the premises. They had some tweeter parts on hand but were missing something that had to be ordered from the factory. It was during the Christmas holidays and my dealer is a combo photo/audio/video dealer so I had to wait about a month. In the interim I reverted to a retired Energy Take 1 center speaker that filled the bill nicely.