Amonrae said:For the preamp, I had Mullard reissue, Tung Sol, JJ, Groove Tube, and Electro Harmonix on hand. After trying each, I thought they all sounded good but each changed the character of clean tone and distortion as well as onset of breakup enough that I couldn't determine all the differences in one session. I kept in the Tung Sol and like it better than the well used stock tubes. I wish I had fresh Mesa to compare with. When I have the time i'll try a further test after living with the Tung Sol a while.
scull said:Get you about 6 different 12AX7 tubes as well as a few lower gain tubes(ECC832, 5751) in different brands and swap out the tube in the V1 position. that is the position that makes the most difference tone wise. I love JJ's in every amp I own but that's me not you. Best thing is not to take anyone's advice but listen to your ear because no one else hears tone like yours truly.
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