http://www.diyaudio.com/forums/showthread.php?threadid=51103&goto=newpost
These discussions are in regard to the use of aluminized Mylar
membranes. Beveridge transducers have always used fully conductive
aluminized Mylar membranes. We are unique in the use of these membranes
and it is only made possible for us because of our totally unique
electrodes (stators).
The details of this technology can be found at the URL above. I hope
you will find it interesting.
Rick Beveridge