There's a NJ user on Ebay named "chris1this1" who can repair your AR3a tweeters, among others, for $40 apiece. That includes return shipping. I no longer see his ad there, but I'm assuming you can contact him there through his ebay name. I sent him my 2 tweeters with blown voice coils and one dimpled cone and they came back yesterday, with nice round domes. They ohmed out OK, so I patched them into my speaker through the front terminals. Had to turn down the pot on the back. Don't ever remember