Class D

Yes like the ones and their lackies pushing yet to be released commercial products, with fanciful claims that will only be proved right or wrong "if" given access to by independent measurement testers.

To be clear here, the 'fanciful claims' were made by Bruno Putzeys, a good 15 years ago with the introduction of his UcD module. And again with his Hypex and Purifi modules. These devices have been measured many times. Any of the claims I've made are a subset of those by Bruno.


So really the extraordinary claims are at this point coming from George. And to trot out yet another worn trope, he needs extraordinary proof to support his claims (beyond just wilful ignorance). So far, not seen it.

After @redwoodaudio 's review of the little Orchard monoblocks, I'm still thinking that as of right now (i.e. could be ordered today), the AGD Audions are the strongest contender.

he needs extraordinary proof to support his claims

I know you don’t believe them, just look at the Technics SE-R1 at what it does and the press reviews it gets of it sound quality.
Which rids the Class-D bugbear of many that say the uppermids/highs are the problem with Class-D.
And what designers of higher standing than you quote.
Just one of those quotes from Cyril Hammer probably one of the best solid state designers in our lifetime with Soulution Audio amps https://soulution-audio.com/

Cyrill Hammer (Soulution)

"if you want to have your Class-D product performing at the cutting edge it is not possible with todays known switching technologies. In order to come close to the performance of the best linear design we would need high-current semiconductors that provide switching frequencies of several MHz or even GHz."

Now we do have those devices in the GaN, but so far the only one using those 1.5mhz switching speeds is in the Technics SE-R1.
All the rest, including you are not using the GaN technology to it fullest. You started with a clean design slate, you should have utilized the GaN to it fullest, but you state you didn't. maybe you just didn't have the ability to do it like Technics design brains trust team do.

Cyrill Hammer is a good designer but entirely mistaken in his comment you quoted.

When class D amps (Purify) are making distortion that is 120dB down, it is serious cutting edge; lower distortion than the Soulution amps.

Again, you need extraordinary proof to support your extraordinary claims.

I wonder if it would ever be possible to have a class D thread that could be declared a georgehifi-free zone.

@atmasphere  You have the patience of Job... and then some.