Treble:
Boost and cut at 7 kHz +14dB shelving type. Add or remove edge and
definition. (or "air").
High Mid:
Boost and cut at 1 kHz +6dB/ -10dB, “Q Optimized,” band pass type. Works
on lower string harmonics, and effects the punch of your sound. (can also control "honk")
10-Low Mid:
Boost and cut at 250Hz +6dB/-10dB, “Q Optimized,” band pass type. Works
on the main body of your sound ("punch")
Bass:
Boost and cut at 60Hz +10dB, shelving type. Controls low end push.
This was copied from the owner's manual with my own notes added. The EQ is unique as the treble and bass are a more "standard" shelving type of circuit, the mids are a bandpass circuit. These should not be confused with an active graphic EQ, if you are looking for 800Hz that would fall into the bandpass of the High-Mid.