I've used two tube amps with Quad ESL 63's that have had the wonderful Nick Gowan upgrade (62' of inferior wire replaced, among a lot of other, more obvious things). One was a heavily customized Sonic Frontiers SFS-40, the other was a pair of Atma-Sphere M60 II.2's. It was no contest, in favor of the A-S amps, which are legendary for their ability to get great sound out of electrostatic speakers. As far as I can see, the legend is the simple truth.
What tube amps for the Quad ELS 63
I have recently purchased a pair of Quad ELS63's and am looking for some advice on a tubed amplification for CD use only. I have been using them with a Linn Classik integrated CD and amplifier and while they are OK they are hardly musical and involving. All thoughts appreciated!