Use the Tungsol 6550 reissue in my Cary SLI-80 on occasion and in the MC275 & MC75s that preceded it with excellent results. Not as 'powerful' sounding as the GL KT88, but very nice mids with female voices.
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Glenn...
Canton Reference 9 Clearaudio SM Pro Focal Bathys JLA 10" Dominion Kuzma Stabi S w/MC & MM Magnepan 1,7i McIntosh MA8950 & MR88 Oppo 203 Roon Nucleus Rose Hifi RS150B Shunyata Gemini-4 Sony ST-A6B, TA-F6B, ST-J75 & PS-X75 Sorane SA1.2 & TA-1L Stillpoints LP1v2 WW Pt, Au & Ag
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