Perhaps the biggest problem of loudspeaker placement is the speaker's interaction with room boundaries and its resultant suck-outs and peaks below about 300Hz. This is commonly known as The Allison Effect. Roy Allison was the designer of the old AR3a loudspeaker and did a lot of research into this. Here is a well written article about it:
https://www.audioasylum.com/messages/speakers/294574/allison-effect.
The bottom line, to tame this hugely negative effect, is to place speakers so that no boundary distances (walls and floor) are equal. What I don't know is just how dipoles are affected by this. I would think the lateral bass cancellation would be of great help as far as the side-wall boundary is concerned, but the floor to front wall ratio still remains. So it would make sense that the distance from the center of the mid-woofer to the floor is different than its distance to the front wall. Maybe Clayton could comment on how this relates to dipoles.
Al
