Thanks SQ.
AVR is set to small/small/small with 80 hz crossover.
Sub volume is manually set to what I "hear" is balanced with the fronts, and cross over setting is turned all the way up (sub volume is only at about 30% level based on the volume dial, if that means anything). I don't have a SPL meter (never used one before, and not even sure how it would work!).
For what it's worth, the fronts are all cabled with axiom speaker wire, and sub is hooked up with axiom coax cable.

Sony Grand Wega
Sony AVR
Sony DVD
Technics CD
M60's
VP150
Nuance SAT 1's
Sound Dynamics THS-10 sub