Otl's with AvantGarde Duos?

Rushton, sorry but you are right, I don't get it!

Please explain.

I was equally polite in showing Ralph that he's not right in his terminology of the Berning design.

There is much, much more to it than that.

As I said, I am afraid that Atmosphere really does not understand this technology at all. There are no Audio output transformers or Solid state audio output devices in the ZH-270, NONE.

I am sure your expertise is in OTL's but the ZH-270 is again way beyond that simple terminology.

It's simply a way better design than normal OTL designs of the past.

Essentialaudio, yes, exactly but again it's even more complicated than that because there is no such thing as a Zero Hysteresis Audio bandwidth output transformer, if Dave invented such a thing, he would instantly be rich :)

It's not an Audio output transformer, there are lots of transformers in the Berning design but none are Audio bandwidth output transformers.

It's certainly nowhere close to a conventional OTL, which is what should be said and correct but not that it has output transformers and Semiconductor outputs, which is not true.

Ralph, there are two things that Dave is really not very good at, in fact, he's very bad at, is visual esthetics and marketing :)

If you ask Dave if he's done any marketing, he'll say, oh yeah, just came back from there, got some apples to make apple sauce!

An I'm not kidding.,

I am afraid that Atmasphere does not quite understand the Berning design, yes, it's not a 40 or 50 year old "OTL" design, but since the transformers and semiconductors are not in the audio frequency signal path, then it's irrelevant if they are there.

This amp is really beyond the normal OTL, which is why Berning named it ZOTL.
The Berning amp is ZOTL and is all tube, completely transformerless and semicondutorless in it's audio signal path.