My listening position is about 10 feet from the sub which sits about 2 feet from the back wall and 1 foot from the side wall, there is virtually no back wall behind the couch since my setup runs at an angle and the room is open to another room that's at a slightly lower level, the nearest wall in direct line with the front of the sub would be around 40ft away.
I think you are right about me sitting in a fairly null area, as John and Peter suggested I'll try adjusting the trim settings to see if that helps.
Of course I can manually adjust everything so it sounds great in my sweet spot, but like most folks that get into this darn hobby it bothers me that I can't get it optomized throughout the room, and the fact that my Denons autosetup will drop the sub 10db's.
