Have you tried placing them in opposite mid-side walls?
Yes. I think they do sound better (or louder) on opposite mid-side walls. But I kind of prefer them physically out of the way.
So I did the next best thing, which is the W/4 subwoofer placement.
Before the 2nd sub, one side of the room had more bass than the other side, and the middle of the room was in-between. It was like 75dB left side, 78dB middle, 81dB right side - a pretty big difference between left and right side.
Now the left, center, and right sides are all even @ 78dB.
