I have a denon 2310ci and 7.1 setup my sub is behind my TV and measures 23ft where I know it is only 13 to 14ft max. In my room Audessey set my fronts to large, centre to small, surrounds to large, and surround backs to small. I am not really a strong bass person, but I think my sub should work harder. I turned LFE off, volume at 12'00 and frequency set to 150HZ on set-up.
Any thoughts would be greatly appreciated, Thanks .....Kevin