Actually, higher than the stands is recommended. Usually a few feet above the ear when seated in the listening position.

I placed mine halfway between ear level and the ceiling. That seems to work pretty well. But then again, the Axiom's QSes are very forgiving in regards to placement.

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris