I have ran Audyssey with my Denon 3311. I have 2 M80's, VP 180, 2 QS8 and Hsu Sub. Even after taking the advice of many by changing the various crossover frequencies as well as setting the FRC to small, I still feel more sound/volume is coming from the QS8's and not from the FRC. The channel settings as well as crossover frequencies are as follows:

Front L: -3 db/80 hz
Center: -1.5 db/80hz
Front R: -3.5 db/80 hz
Rear R and L: -3.5 db/80 hz
Any thoughts or suggestions?