You want to manage the crossover for all your speakers on the receiver settings. If you have an older 500, put this on bypass, otherwise crank it clockwise to the highest setting to get it out of the way for the receiver to manage.
I've always used and 80hz crossover across the board, as to me it is the comprimise for HT and music applications. Not sure I've heard Axiom say they recommend 40hz?
Now, for music many bump down the receiver crossover on the 80's to say 60hz. Also, leave each speaker set to "small" in the receiver.
