Questions re:  GaNfet technology vs other designs.

@charles1dad , I would not be so quick to jump on the bandwagon.

@snapsc, have we all forgotten the Carver challenge already? https://www.stereophile.com/content/carver-challenge  -- Bob, took one of his SS amps, a rather run of the mill one, and in 4 days, made it sound exactly what was assumed to be a tube coupled tube amplifier. His goal was to match the transfer functions, or specifically the input to output relationship with a real load, which in laymans terms the frequency response (magnitude and phase) measured at the speaker terminals. Once he did that, they sounded the same. Did he perhaps add in some distortion on his amp to match the other amp? Potentially. He of course did not detail the changes, but the vast majority of the nulling requirement would be to match the frequency response at the terminals of the speaker. That is how you make two amps sound effectively the same. If you drive the amps into clipping, all bets are off. There is no indication that was done in the Carver Challenge, but a comment indicates he had to add lots of impedance at low frequencies to match what was happening on the two amps (drop it from 500 watts to <100 watts).

Too bad carver couldn't do this in production models, plus the two amps would probably still sound different with different speakers.

Presumably there is better measurement equipment today which would allow the "fine tuning" of the various amps I mentioned in a fashion that might? allow them to sound very similar??

@invalid ,

I quote,

No matter what speakers we used, every "difference" we thought we had isolated turned out to be there, in equal quantity, when we swapped amplifiers.

He probably could have and maybe just did most of his work with a resistive load adding in a set of speakers for verification. He wasn't going to give away all his secrets.

He did do things with his production models, but it would be good to question what are real sound difference, what is voicing, and what is marketing.

I would not be so quick to jump on the bandwagon

Bandwagon jumping?

I simply agree with Ralph’s succinct and clear explanation. I find it to be more on point and inline with the real world listening results people experience. Make no mistake, I appreciate your comment and perspective. I just find his more credible. That’s all. Good discussion.

Charles