I live in a studio (a small one in San Francisco) and have the QS8s mounted about 3 feet above sitting position on the wall behind the seats (at most one foot from the chairs). It's not perfect and does not fit what Dolby labs recommends, but they still do an amazing job of enveloping me and my guest/s in a realistic sound field.

jr

"What can be asserted without evidence can also be dismissed without evidence." C Hitchens