I had to mount my QS8 speakers on the rear wall and my couch was pushed right up against that same wall. While it wasn't ideal, it did work pretty well.

Since then, I've made a dedicated theater room and put them on the side walls.

Check out my (old) home theater at NickBuol's (old) Home Theater as I think that there are some pictures in the gallery showing them mounted on the back wall.

Farewell - June 4, 2020