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"Class-A" Ampfieirs on the market ?

Have you considered Sugden?

Greetings,

I hope all is well. I recall Sugden was one of the early adopters of the class A philosophy and although not all of their amps now adopt that bias setting, they still make a few: Sugden Audio: Masterclass

I haven't ever owned one (too much into DIY myself), however I knew a gentleman whose opinion I highly respect and he said having owned a ton of other amps always regretted selling his. They're not inexpensive, but of course that's generally true of the overall design for obvious reasons.

Good Luck!

Eric