Hi SatKartr,
Once you get the QS surrounds between 3 and 5 feet up above your ear level when you are seated, differences in height become insignificant in most rooms. And JC is correct; they do not have to be at identical heights. My right side surround is 2 feet higher up than my left side surround, and it's not noticeable at all. Plus they don't have to be exactly opposite each other. My right QS8 is about 1 foot forward of the left one and there is no significant alteration of the surround field.
Given all the variations in room layouts, ceiling heights and furnishings, I still encourage initial experimentation using a couple of step-ladders or the brilliant solution shown above, but the QS8 placement overall is remarkably uncritical.
Regards,
Alan
