I tride the M5s tilted up on folding chairs. In this room I had to shim the back legs with CD cases to get them level. Sounded much better to my ears that way. Whatever works though.
Admittedly, they were too high to be tilting up and were firing above my head likely from that distance.
I guess the takeaway is the variability with proper setup and tweaking for individual rooms. The guy I had over had never heard a properly set up stereo pair. Really makes a big difference when the speakers are put where they sound best and not look best. I always tell people they will get used to the speakers being out in the room a bit. Easier to vacuum behind ‘em!
