Tony, you can test and tweak and drive your self crazy. I've spent countless hours using the real traps sweeps in 1hz increments, REW, SMS-1, filled the room with bass traps and acoustic panels (gave me the most improvement), etc.. All of these things help to a point. But, unless your using multiple subs placed correctly on opposite walls, your not going to accomplish a lot in flattening the frequency for all seating locations. Sure, you might make a difference in your primary seat, but as soon as you move a foot in either direction, or move your sub a bit, it will sound totally different. If you only have 1 sub, I would say place it close to a corner that is furthest from the largest opening of your room into the rest of the house and enjoy your Axioms.
