Why those funny octal preamp tubes? Why not use 12AX7s like every other guitar amp on the face of the earth?
I’m certainly not knocking 12AX7s. These – and other miniature or “peanut” tubes as they were called when they were new – have been used with great success in so many great amps, you can’t argue with ’em. But, I discovered that 6SL7s have a great sound. In a good circuit, they yield a thick, rich, power-tube-like tone that even the best NOS 12AX7s cannot match.
