Arthur, I distinctly remember EI's 12ax7 having plenty of highs. I tried the regular silver label. I believe they have a premium "gold label" tube in production as well. I havent had an opportunity to hear the "golds" yet.
The "silver" EI's are cheap and readily available.
My three favorites for this player so far have been, EH 12ax7, Sovtek 12ax7 LPS, and the aforementioned Telefunken. Though I havent tried several recommended out of production tubes, including Mullards, Amprex, or Sylvanias, among others. So, by all standards, my experience is rather limited.
The "silver" EI's are cheap and readily available.
My three favorites for this player so far have been, EH 12ax7, Sovtek 12ax7 LPS, and the aforementioned Telefunken. Though I havent tried several recommended out of production tubes, including Mullards, Amprex, or Sylvanias, among others. So, by all standards, my experience is rather limited.