some AVR's also have "HT-EQ";
when you switch it to ON, it rolls off some high frequencies that are in the movie audio for large rooms (cinemas).

in the cinemas, the excess high frequencies are attenuated by the long distance the sounds have to travel through the air;
this does not happen in HT rooms because the distances are short.

so, if you have this setting in your AVR, switch it to ON.

See: http://www.blu-ray.com/community/gallery.php?member=Gelli
or: Axiom Gallery