While I have a C22 rather than C2300, I've found that tube-rolling with new production gold-pin Tung-Sol and Gold Lion (all fully tested) made a very nice improvement in SQ. Blacker background and more "there, there" (in my non-pro review). I've felt no need to go with an external phono-preamp with my Ortofon Cadenza Black and a half-dozen other cartridges. YMMV.
EDIT - I see you are using JJ's Telefunken tubes. Not sure the others would gain you anything other than a slightly 'different' SQ.
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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
Last edited by Formerly YB-2; 10-31-2023 at 01:04 AM.
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