Audio Research SP-11 MK2 ...

Can't remember what tube is used for the 11, but i started experimenting with the NOS tele in other gear, and it made a dramatic difference compared to other highly regarded tubes, holographic, without sounding too euphonic.

That preamp uses 6922's.

Thanks, Geek. My tube rolling experience was with the same tube type in a Steelhead, so having tried Mullard gold pins, Siemens NOS and Tele NOS, the Tele was by far the best sounding tube= holographic mids, but not lush sounding. Granted, the circuits are no doubt different, but to the extent one could extrapolate, the Tele made a dramatic difference in the sound of my phono stage.