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When I use a 12AX7 or 12AU7 tube in my AuneT1, it sounds terrible. I usually have the volume right at 12 o'clock with any other tube

(6DJ8 or 6922EH). Now with the 12's I have to turn it up all the way and I can just start to hear it and it's sort of muffled.

This 1st happened with a 12AU7 and I sent it back for a 12AX7 and the same results. What am I missing here.

Edited by Charliemotta - 2/15/14 at 7:25am