I replace the EZ80 tube in my Border Patrol DAC SE USB+SPDIF with an EZ80 GE made in Great Britain. The tube was made for GE by Mullard. The improvements were significant. The DAC now sounds more dynamic and the high frequencies improved. My wife says its more lively.
From my experience with similar tubes, 50-70 hrs is when they come into their own but that's awesome to hear that a great Dac just went up another notch (es).
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.