Awesome James!
make sure to run the mids above 12:00 (it's really more like a treble knob), I found 1:00 to be the sweetspot for the mids for a modern metal tone.
the presence (really just a contour) should be around 1:00 as well...
with the presence and mid knob set to 1:00 you can use treble without it getting fizzy and bass without it getting boomy...
with the mids below 12:00 you'll always have trouble with fizz and boomyness.
The controls on the Über are really different, also ignore how they're labeled, cause it's not like you'd expect.
the treble is working in a range that would usually be called "presence", the mids are what would be "treble" on other amps (run this one high, even for scooped sounds!), the presence is what would be called "mids" on another amp, it's really a contour/low mids knob.
the startingpoint that the manual suggest (everything to 6) is really a great starting point for the amp....from there it's in most cases better to go higher (especially with mids, treble, presence).
you can get away with having the mid knob just below 12:00 if you set the presence knob high (to at least 2:00), but then it can get fizzy quickly since by setting the middle low a lot of high end will be gone, and you'll feel urged to puth the trble a bit more...which leads to a fizzy tone if the mids are below 12:00...
well, you'll find out for yourself, just giving you a heads up so you won't be disappointed with the first tones you get...it really is a killer amp!