I second the Sylvania 5751's. I've only put them into my DAC recently but I can clearly say right now that it's the best my Alpha has ever sounded.
For a second-choice budget tube, I'd recommend either a JJ 12AX7 or Sovtek 5751. The JJ is a little more transparent, the Sovtek has more richness.
I also found the famed Mullards to be rather dull sounding.
Good luck!
Michael
For a second-choice budget tube, I'd recommend either a JJ 12AX7 or Sovtek 5751. The JJ is a little more transparent, the Sovtek has more richness.
I also found the famed Mullards to be rather dull sounding.
Good luck!
Michael