Perfect For My Fender Super Champ!
I used this in my Fender Super Champ as a replacement for the original Groove Tubes 12AX7, and I'm delighted with the sound. I'm using it along with a matched pair of JJ 6V6S amplifier tubes, and the sound is much warmer and full-bodied. Much better lows. I like it so much, I just ordered a spare :-)