... out amplifier. The amp's preamp and power sections are powered by 6L6GC and 12AX7 tubes, respectively, and drive specially voiced 12 ... footswitchable channels with independent, three-band EQ and volume, plus a footswitchable gain/volume boost on the lead channel to provide ... amps also feature global damping, presence and reverb controls, a buffered effects loop and dual speaker jacks in parallel (head ...