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Is GU50 a contender?

Posted by andy evans on October 3, 2020 at 06:45:25:
I see Anatolyi makes amps with the GU50. On the other hand, for low power he prefers the 4P1L.

I'm unfamiliar with the GU50. It turns up in some Chinese amps. Should this be on my radar as regards sound quality in triode?