So, with lots of background repairing and rebuilding broken speakers, I found it hard to believe that four of these things could all have blown tweeters. So I spent quite a bit of time troubleshooting them. Ended up putting a pair of Peerless decent quality tweeters in, and they are good to go for another 23 years!
Thanks for all who chipped in with great advice.
There is no truth anymore. Only assertions. The internet world has no interest in truth, only vindication for preconceived assumptions.
