Yes, I believe that you can adjust the bass managment in the dircect mode. I do not have my Soundstage in front of me to describe how but these options should be available in the setup, bass management, or advanced menus. If you can not figure it out, I recommend contacting Aragon Tech Support at 1-866-781-7284, option 1. Ask for Steve.
Good Luck!
Good Luck!