For channel 3:
- set gain to 2-3 o’clock, presence to 10 o’clock, treble to 2 o’clock, mids to 10 o’clock and bass to 9.30 o’clock, then forget about them.
- now equalize your amp with the graphic eq sliders. This is the real tone stack for you. Treble, mids and bass are preamp gain shaping...