9 pin miniature preamp tube (amplification factor = 60), less gain than a 12AX7, preferred by blues and jazz guitarists alike.
- 9 pin miniature preamp tube (amplification factor = 60),
- Less gain than a 12AX7
- Preferred by blues and jazz guitarists alike
- 9 pin miniature preamp tube (amplification factor = 60),
- Less gain than a 12AX7
- Preferred by blues and jazz guitarists alike