My QS8s are at ear level about 6' back on my rear wall in my oddly shaped room.
They are quite asymmetrically placed in relation to my MLP but still work really well due to their unique sound dispersion characteristics...
TAM
thanks TAM, I have 2 surround back QS8's (currently mounted up high) sound great as well. I'm glad to know you have a positive experience with the QS8's mount at ear height.