Depends on the gig. If I'm sharing backline with someone who shows up with a 2x12 and a 15 and no horn, and it's a jazz tone, I may roll the bal down to the bridge, and roll some of the treble up to make up for the frequencies I'm used to hearing that their rig may not be producing as loudly (or at all). It's very much a mix issue -- if you have a relatively transparent rig, and you crank the treble up without doing anything else, it'll sound like a$$ for sure; but the treble (and the bass for that matter) adjustment on the LEJ pre's are basically there to be powerful tools - once you're used to how sensitive they are, you'll wonder how you ever got along without them. As far as the people that ride with them both cranked all the way up, IMHO they seem to get that really great 'shiny new string infinite punch' tone that a lot of us really love (sort of early Stanley Clarke meets Mark King) that's really great for solo spots, slapping, etc, but to my mind it sounds best alone - for blending in a rock band (which is what I have to do), flat with tiny adjustments is the way to go.