Hi,
Just a small correction about what I've said: either slightly forward or slightly to the rear of the listening position (Dolby Labs actually says up to 20 degrees forward or to the rrear of an imaginary line drawn through the listening area). And higher above the listener's ears is usually better--2 to 3 feet works really well in my room, but every room is different and do experiment with placement.
I've heard QS4s placed way up high on a wire shelf behind the listening area in a big loft in Brooklyn, and they sounded terrific.
Regards,
