- Volume: From warm fat jazz clean to thick horn-like barking overdrive.
- Tone: Noon for flat. Turn down for warm, smokey tones. Turn it up to boost upper mids and cut through the mix.
- Presence: Adjusts ~ 5khz range. Set to noon to start. Turn it up for more bite! Turn it down to warm things up.
- Master: Sets output level. Lots of boost on tap.
- Hi-Lo Button:
- Hi/Red: Like swapping in hotter tubes, for more gain, overdrive and attitude.