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RE: Looking for something different. KT66 or 77?

Posted by classfolkphile on February 17, 2016 at 11:20:19:
I've tried the Genalex re-issue KT66, KT77 and KT88s as well as Black Treasure 6CA7s (and various GE, Sylvania, SED, Svetlana and Tung-Sol power tubes) in my Cronus Magnum.
The KT66s sound the best: even and extended frequency balance, holographic, excellent image separation, and the refinement and immediacy of SETs.
The KT77s sounded like a poor cross between an EL34 and a KT88, with a discontinuity between the frequency ranges.