Now set the sub at 40Hz for movies and cross it over at 40Hz in the receiver. Try playing the Eagles and some LFE from Potter or something and see what you think.

If you have LFODH, play the apartment shooting scene in the beginning. At 40Hz, you will feel the machine gun right in your right ass cheek through your couch \:\) . You don't get that at 80Hz I bet.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated