"Len Moskowitz" skrev i meddelandet
...
We're working on an interesting application that needs a super tweeter
that can operate at 40 KHz. Anyone have a favorite driver that they'd
like to recommend?

I You wannna go a bit unconventional the Max Townsend's Super Tweeter would
suffice..

http://www.townshendaudio.com/supertweeter.htm

I have a pair mounted on my series two B&W Matrix 801 and it works
fantastically well..

/ptr