These speakers are a bit weird that way. The get better closer to the wall, though I have never tried them 1/3 out. Maybe that is a 'later-this-week' experiment.
I have had the sub on the side but I got better decay in the waterfall (faster) in that position. Still pending trying the sub behind the listening area.
Room dimensions are roughly 24 x 27 with stairs and others door towards the back.
Thanks,
OBG