Medogsfat:
Jaff I agree with your "out of the box" comment & I've often wondered about this technology but never really looked ito it. Looks like that is gonna change
Chris.
I've had a pair of DIY electrostatics (by someone else, along with a tube power amp) standing behind my chair at the office for at least two years. I have no power supplies for them, and the membranes are most likely shot - which is why I haven't bothered building the PSUs, and why the whole project is waiting for a round tuit... so I guess I'm an expert on ESLs 
But do fix those Quads one way or another. They are definite classics, and sound mindblasting! It's been a while but I think the time I heard them was in some control room / recording studio at our national broadcasting company. Some relic from old times, these locations are now typically crowded by Genelecs...