hi keko. i run my tone controls straight up 12 oclock which is out of the circuit. the markbass is 16db cut/ boost either side of 12. i have the bass control CUT to the 11 oclock position. i like to run the bass volume at 3/4 so i kinda sorta know where i am in regards to max bass guitar volume, again no pointer knob and i havent found a knob that has one the will work in the extra deep hole. if im in active mode, both mids up a taste, the bass rolled off a bit and the treble flat, and i use the humbucker in series, it distorts ie clip light goes on and the amp input is about 1/4 of the way up. to get a clean sound i have to back off the input volume to almost off and crank the amps output volume. any suggestions? thanks