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In Reply to: Different function of 12au7s and 2 12ax7s in amplifier. posted by TGT on February 2, 2016 at 10:28:43:
TGT:
The 12ax7 are first stage input tubes, while the 12au7 are drivers for the output tubes. I would expect changing the 12ax7 would have a bigger impact on the sound. Lots of good choices for this tube. In the enjoythemusic review of this amp, the reviewer tried GE 5751 in this spot and thought it a nice improvement. Any good USA 12ax7 or 5751 from the 1950s should be an upgrade over the stock Chinese tube.
Enjoy the roll!
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Follow Ups
- RE: Different function of 12au7s and 2 12ax7s in amplifier. - Mendel 08:09:51 02/04/16 (0)