Add longevity too, at least for the earlier ones. To my ears, the Teles are a sonically balanced tube, not favoring any frequency range over another. They sound glorious in Jadis equipment, much as Rayhall and Xon57 described. I have used them and Mullards in my Audio Logic DAC as well, and the Mullards are just too bright in the upper midrange for my tastes--maybe a little more "exciting" because of the emphasis on the upper frequencies, but not as rich and well-rounded as the Teles. Xon57, what vintage are your Teles, and how much use have they gone through? I might be interested if South 43 passes on them.
