If I were going to try SET amplification on, I would head straight for something like the Sun Audio 2A3 or similar REAL SET, the direct heated tubes, and forget these obscure brands, (not meaning Cary or Almarro,) with mysterious and hidden iron inside, who knows whether the whole thing isnt on a Chinese circuit board type of amp. Forget "SET" done with pentodes, and these big beam tetrodes.... What no one talks about is the fact that those big Russian 6C33C transmitter tubes burn up fast. No one talks much about that. They just put them up on Audiogon. They'll light up your life in more ways than you care to imagine.
You ~apparently~ want something that will light up the music with pure unadulterated magic. A tube single ended triode amp is only as good as the iron in it, so to do it "right," find a real DHT SET amp with very, VERY good iron. Get off to a flaming start, pardon the pun,
a flamingly enjoyable start that is, because all these other solutions are taking your existing speakers for granted, which are NOT very suitable for an SET amp, and suggesting a 211 amplifier is, I believe, lacking in sensitivity for the poster's reasonable wishes. If I were running with your speakers, I would be looking at a 250 watt solid state amp, not a 3 watt triode amp, regardless of listening levels, or room size. We are talking about Dynaudio drivers, afterall, full stop. They want MORE current, not less, so forget it. So, start your SET quest by looking at more compatible speakers. It will be worth the effort.
The magic of SET, if that is what you are after, is in the simplicity of the circuit. Once you start changing the rules, from single ended to push pull etc, for what you gain in "PRAT," or "speaker control," you move further and further away from your stated goal, "I want to try SET." Done right, you move to relieve the SET amp of any and all bass duty, and therefore things like damping factors are a moot point entirely, as they should be, in this little realm. With reasonably efficient drivers, -those above 94db, a 3 watt amp shelved >@100Hz can become a monster, with a strong source signal. Both the amplifier and the speaker driver will reward you with SET magic, and emotion, and abundant dynamics, in spades. It does me, daily. ...Otherwise, you will not hear the magic in its correct context. Besides, bass is cheap these days, and available at Costco, if need be, as far as I am concerned, which makes the whole SET thang pretty durn accessible. I hope Gizmo is reading this from ...elsewhere...
