In my experience you can't go wrong with GL reissue tubes. However, they've become quite expensive and I found tested JAN Phillips 12AX7 & 12AT7 at about 2/3's the price and am very pleased with them. Very quiet and no microphonics.
Have EH as a back-up. They are cheap, don't sound bad and are reliable.
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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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