Also thought I'd chime in; took me a while to figure out how to get some sparkle out of the 201 (or I guess any of their amps with "Tri-Q Contour").
Contrary to my instincts I found you need to have the tri-q all the was to the bass roll off position (full clockwise) which for some reason makes the tops sharper. Go figure.
Edit: looking at the manual now the symbol (which to me looks like a bass roll off ) is actually a mid/high boost:
TRI-Q: The frequency response is flat, or neutral, in the middle. The left
end of the control accesses a “scooped” EQ with full treble and bass, but
less midrange, often used for greater “chime” and clarity. The right end
of the control accesses a midrange-treble boost with reduced bass, often
used for a more forward lead-guitar effect. These three main voices are
blended smoothly on in-between settings.
http://quilterlabs.s3-us-west-1.amazonaws.com/2013site/manuals/2027-tone_block_201_manual.pdf