[quote author="ioaudio"]
do i destroy the membrane when it sucks to the backplate because of to much volts?[/quote]
Hmmm. I am inclined to say "no". I think you should be ok. If the diaphragm gets suddenly "sucked" onto the backplate at, say, 80V when it should be at 60V, then I think it would be ok.
However, if say, you put 120V on it when it should really be at 30V, then you might be in trouble!
Maybe try 60V as a guess... I would ask Gus, Marik, Dale, or PRR as they are always very knowledgable.
By the way, I have been offered a pair of these capsules with the CV710 amplifiers for £100 - do you think this is a good deal?
It says on Michael Hartkopf's page that they were originally DM 1200 each!