Arrrgh - sorry for posting again, but I deleted a paragraph to rewrite it and then accidentally posted instead.
What I wanted to say was that there are a number of tube amplifiers that also work quite well with electrostats (some of which I sell), and there are a few that don't. It seems to me that the most critical factor is the quality of the output transformers - "budget" or high watts-per-dollar tube amps usually don't work well with electrostats. OTL's often work quite well - I got good results with the Berning amp mentioned, though in the end I chose to carry a different brand. Also, very high current and/or Class A solid state amps generally work quite well.
What I wanted to say was that there are a number of tube amplifiers that also work quite well with electrostats (some of which I sell), and there are a few that don't. It seems to me that the most critical factor is the quality of the output transformers - "budget" or high watts-per-dollar tube amps usually don't work well with electrostats. OTL's often work quite well - I got good results with the Berning amp mentioned, though in the end I chose to carry a different brand. Also, very high current and/or Class A solid state amps generally work quite well.

