I would start with all of the EQ settings at "mid" point (flat response). Turn the output level to "off" and set the input to a level that allows the peak indicator to blink on your loudest playing notes, bass notes will drive it to clipping the quickest (check it out with the C6th neck). After all that, raise your output to the level necessary to get your working volume. Jack Stoner may also have some settings over on his site, not for sure.
Buddy Emmons has mentioned a similar procedure over on his site, check out his forum page there as well.[This message was edited by Ken Fox on 30 June 2002 at 09:08 AM.]