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RE: I would say nearly all amplifier designs are conceptually WRONG!

"Sounds rich is correct. It always sounds rich because of high 2nd harmonic. "

-While rich sounding amps have high 2nd, it is not the high 2nd directly that makes it sound rich.

"What I find more important is that SE can't even do a simple sine wave correctly much less a complex music wave form."

-While not perfect, it is still better then anything else available.

"And yes I have known for decades that a triode is the most linear amplifying device. But I would use it in an amp that is push/pull all the way(except for a 1st stage transformer used for phase splitting) without negative feedback. Not perfect but much preferable by me to SE. And I could at least get some real power from such a configuration."

-A triode in PP has the exact same non-linearity you are concerned about as the SE. PP does not change the transfer function of the tube.
All you have created is symmetry, not linearity.

Your configuration is suitable if you need the power, can't argue that, but realize you have created a worse situation then having a single SEnded triode .

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