@atmasphere Interesting (though that was not marketing, you and @tvrgeek both got that wrong) So class T is not really a class though, and it is really just Class D with GaN mosfet built in house like your amplifiers. Nice! The PA-10's sound freaking awesome, much better than the Schiit I used to have, you should give them a listen and like your amplifiers the reviews have been very positive.
https://www.hifipig.com/gold-note-pa-10-power-amplifier/
https://positive-feedback.com/reviews/hardware-reviews/gold-note-pa-10-amplifiers/
https://6moons.com/audioreview_articles/goldnote13/
https://darko.audio/2020/07/brawn-and-brains-gold-notes-pa-10-power-amplifier/
According to Wikipedia, “A Class T amplifier is an audio amplifier IC design. Rather than being a separate “class” of amplifier, Class T is a registered trademark for Tripath’s amplifier technologies. The control signals in Class T amplifiers may be computed using digital signal processing or fully analog techniques.” The page then goes into detail but I’ll not quote all that here. So, it seems that most switching amps are class D, some are erroneously called class T and some really are class T.
I’d guessed given the overall sound of the PA-10 that it was in some way Class D in its architecture, but Gold Note makes no mention of this in their technical specifications. Personally, I’m a massive advocate of Class D technology when it is done well and so I asked Gold Note directly “What Class of amplifier is the PA-10?”. Here is the response I got – “ The PA-10 features quite an interesting design. It is not a Class D amplifier but it leverages a new technology that uses MOSFETs for the output stage, in common with the Class D, featuring an output oscillator (GaN Mosfets with Gallium Nitride), a proprietary design that actually doubles the power of the amplifier when reducing the impedance – exactly as a pure Class A but with extremely high efficiency to deliver great amounts of energy.” So there you have it.