J,
are you still sticking w/ these settings? I experimented w/ my LRC last night and tried your settings and the result was pretty horrible. Voices sounded soo "chesty" it was hard to distinguish the words people were saying (well, maybe that's an exageration, but it didn't sound good!).
I'm curious, have you checked your output levels? Is a 11kHz tone playing 4-5 dbs lower than a 1kHz tone?
How many dbs do the pots attenuate (what's the db difference w/ the pots at 7 or 5)? I guess I could measure for myself, but I'm lazy.