Tube Rolling for TAD-150

I rolled the stock tubes out of the 150 with a set of Tele 12ax7s and as one might expect they were a huge improvement over the stock at7s. The at7s seemed to put all the instruments in the middle. It was all depth with very little width. The Tele ax7s widened the sound stage considerably while keeping a nice center image. Right now I have a pair of Sylvania 5751s in there and they are excellent too (the teles went back in my Fisher 400). Sound stage is wide, excellent center image and wonderful detail. These also give you slightly more play with the volume knob. 11 o'clock is very loud though.

I also have the TAD-60 amp and have changed out the Sovtek 12ax7 to a NOS Mullard and the 12au7s to a pair of GE. A nice improvement again over the stock tubes. I run a quad of Valve Art KT88 and I like them much better than the stock EL34's. The bottom end is now to die for.

Ecruz: The 5751s are much better than the stock tubes in every way. Comparing the 5751s to the Tele AX7s I would say that the bass is tighter and more defined with the 5751s. They both put out sweet mids and highs. I'd probably give the edge to the Teles in these departments though. Both tubes are excellent.

Onotu2: I used smooth plate Teles. I like the Teles better in my Fisher 400 than the 5751s. So I made the switch back. I am very satisfied with the 5751s in the TAD-150 though. You really never know how a tube will perform in a circuit until you try it.