I have just been using mine mainly set flat the Gain at 12'o clock as well, a lot of punch and pretty deep sounding, then to taste with the tone control on the bass. That's at home tho, have a practice today and will take it along.
Not sure how sensitive the gain knob is, when I go from passive to active basses there is not a lot of boost or drop-off in volume.
Missing a mute switch atm, no deal killer but it would of been nice.