"Glaswerksу Super Overdrive II is a 2-channel amp with global controls including Gain, Treble, Middle, Bass, Master, and Presence, along with switches for Bright, Shift, Voice, and Fat. Both Overdrive channelsяOD1 and OD2яhave Drive, Overdrive Master, Treble, and Bass controls, while OD2 also has a Middle knob control. With dual Reverb controlsяone for Clean mode and one for OD modeяthe reverb can be totally switched out of the circuit. The amp can be built with EL34, 6L6, or 6V6 power tubes, and powered at either 50 or 100 watts. In addition, Glaswerks has five different voicing options guitarists can choose from. That said, if you have a PhD in tone, you can have some input and help create a custom voicing. "