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In Reply to: RE: What Makes SET Amps Tick? posted by 13th Duke of Wymbourne on May 21, 2025 at 18:45:16:
If you don't agree, ok, however, it seems quite plausible to me.
https://next-tube.com/articles/Cheever/cheever.pdf
Instruments and others voices have significantly different patterns from what your ear would make. How do we know what the brain is filtering and what it is not, other than whatever overlay of harmonics the ear makes on incoming sounds is not perceived in and of itself.
I think it explains the resurgence of SET better than any other story I have heard so far. It is also consistent with what renowned audio journalist Jean Hiraga came up with a couple of decades earlier regarding what distortion patterns he thought gave the best sound.
https://www.stereophile.com/reference/406howard/index.html
This experiment by Keith Howard is also very interesting. He wrote some code to add distortion to a digital audio file. He experimented with patterns and levels and found, unsurpisingly, that the unadulterated file sounded the best followed by the even/odd exponential decay pattern. The worst was the all odd pattern (typical of push/pull amps because they cancel to a large extent the even harmonics).
My own anecdotal evidence is also in play, every audiophile that I am in contact with has either SET, TriodeFET (single stage single ended hybrid), PP Class A triode or Class A PP SS. No one has Class AB or D and most are single ended. ALL of them came from high power, low distortion Class AB or D amps...including me. Definitive? Of course not; however, it is telling that as they gain more experience this is the direction they drift.
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Follow Ups
- Read Cheever's thesis...it's easy to do... - morricab 05/22/2506:27:25 05/22/25 (5)
- Problems with Cheever's thesis - Ralph 10:59:58 05/22/25 (4)
- RE: Problems with Cheever's thesis - morricab 09:30:48 05/26/25 (3)
- RE: Problems with Cheever's thesis - Ralph 09:08:52 05/27/25 (2)
- RE: Problems with Cheever's thesis - morricab 12:18:07 06/1/25 (1)
- This seems in contradiction to another post you made - Ralph 08:23:50 06/2/25 (0)
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