Class D

I did not hear anything from the Gan amps at AXPONA that would make me think they are superior to the one I am using.

I believe you would have, if the one/s you heard used the GaN technology to it’s fullest, which is to be able to increase the switching frequency 3 fold to 1.5mhz like Technics did with the SE-R1 and maybe in Feb 2021 the SU-R1000.
Then the "switching noise output filter" can also be set higher and so eliminates most of the switching frequency noise left at the speaker terminals. Without introducing phase shifts back down into the audio band, like what happens with lower 600-800khz switching frequencies/filters.
EG: in red https://ibb.co/vvwzGV5

Cheers George

@atmasphere , Ralph, would you ever get caught building a class D amplifier? Seems like the antithesis of what you are all about. Class D amps can sound very good but there is no magic there, not like your amps, Pass amps or John Curl amps. I have never heard Boulder or Constellation amps. With good speakers it is that magic that counts. So what if it is harmonic distortion. Us audiophiles just want to be happy and a great amp is like catnip. Class D amps just do not get me high, at least yet.

No magic in Class D?  Pishaw!   I would argue there is even more magic possible.

I’m listening to Class D Bel Canto ref1000m amps into kef ls50 metas as I type. Magic. Plain and clear. You can reach out and touch it! Fed by mhdt Constantine DAC into Audio Research sp16 preamp.

Having heard Atmasphere amps at various shows, I’d say Class D fits right in in regards to sound and is a natural addition to the product line.  

georgehifi, perhaps. Comparison would tell. My comment was not meant to be a definitive conclusion, btw. I think that was clear, and that only head to head comparison would reveal distinctions.