You will want to take this into consideration. The part about square rooms especially. Most likely, you’re going to have to try several positions to find the perfect place for the subwoofer. I think crawling for bass is going to be your best bet.
"If you have a choice, square rooms are the worst for nodes; irregular or rectangular shapes are preferable, and as you move couches or chairs closer to walls, bass intensity will increase. Conversely, the middle of the room will have less bass intensity." by Alan Lofft
