1. Performance was similar with subwoofer located in either corner A or corner B. Corner A works much better for the furniture layout.
2. I calibrate to central listening position # 2 (loveseat).
3. Bass effects are as follows at various seating locations:
#1 Chair - Weakest bass performance in seating area.
#2 Loveseat - Very good to excellent bass.
#3 Sofa - Very strong bass.