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AT7 tube recommended

I have a MAC MC 275 version vi. I have replaced the stock KT 88s with SED 6550s or JJ KT 88s and the 12ax7s with os Teles but have, so far, left the stock AT7s in place. The newer tubes have improved the sound, both warmer and clearer, but does anyone have a suggestion as to new 12at7s to roll in, hopefully to give a more tubey sound. I know opinions differ as to the effect of different tubes on the sound of this series of amps and don't want to row about it, but any good suggestions would really be appreciated. Thanks.
LowIQ

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Topic - AT7 tube recommended - dgaapc7 17:39:34 08/19/23 (22)
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