Advice using electrostats with tube amp.

Stringreen, I already have the Cary so that's the starting point for my inquiry because it will probably stay in the system.   It'd sure be interesting to know the basis for your advice though as it may help with the decision re the electrostats. 

I have tried quite a few different amps with my JansZen hybrid electrostats. They are 87db sensitive and it's been dificult finding the right amp to mate with them until I tried the Linear Tube Audio ZOTL40. No impedance problem here. The beauty of tubes and speed of SS and the most powerful 40 watts I've ever experienced. I still have plenty of headroom.

The Theos has an impedance of .8 ohms at 20khz. It’s not a 4 ohm speaker. Still many people like using tube amps with MLs. I don’t think it would hurt to try your tube amp with them, but I would try to get my hands on a solid state muscle amp for comparison.

"Sfall, the room is about 15X20' with 8.5' ceiling but my listening position is only about 13' from the speakers and i dont listen at high volumes. I agree withyou, then, that it should be fine but because the purchase is not a small one for me, I'm trying for all the advice I can get. Thanks"

You'll be OK. I've powered ML's in a room that was a little bigger, and with an amp with less power than yours.

I need to make a correction.  Although it would have no bearing on the subject of impedance, the speakers in question are the Ethos (not Theos) which, as well as with the Odyssey's before them, I had been using with the Peachtree 220 amp. Today I'll be transporting the Cary to the guy's house who has my old  Ethos for a trial. Room acoustics there are significantly different than mine but I should get some idea about the overall sound. Also, I've been running the amp in triode mode with the reference 3a's and someone suggested that that switching to ultra linear may make a better match. Using the 4 ohm posts also came up in that discussion.  BTW, I've used mostly panel speakers for over 40 years (Acoustat, Magnepan and ML) so my familiarity with them is the only reason I'm even at trying this. I really thought my current setup would be the forever one. We'll see.