Seas Excel Millennium Tweeter

@auxinput, Thank you for the troubleshooting tips.  I did not think about simply replacing the voice coil!  I am an electronics technician with a fairly complete home bench setup, I have verified a "bad" tweeter, what I did not verify was if it is simply the VC, HUGE Thanks for the advice!!

Really nice speaker, but a  bit big/heavy for my taste,,although am considering down the road to acquirea  pair,,,I have the Seas Thor MTM , has the Millennium tweet, I asked Richard Grey should i replace the 17 yr old tweets, *do they work? * *Yes*  *Then  no need to replace*.
I am considering upgrading my Millenniums to the new Flagship Cresendo tweet,,,and the xovers to all Mundorf supreme caps. 
back to you.
You could ask madisound if you can use the Cresendo tweet/replace the Millennium. specs look near identical, except the Cresendo is a  high sens. Like 93 vs Millennium's 87 =- might be a  issue. 
If not, just order the single Millennium, plug and play, well might needa  tech to solder the connection. 
I have no issues with the Millennium, just thought i might try the Cresendo. My hunch it is superior to the Millennium. 

the new and older M will sound identical at getgo,,no such thing as imbalnced due to burnijn,,blah blahh, Burnin is  a myth.