Hi Tony,

The QS8s are a bipole design, not a dipole, so they do not create a "null". And they work best on the side walls, to each side and a little back of the central seating area, about 2 to 4 feet above the heads of seated viewers (it's not critical).

We actually call the QS8s "quadpolar" surrounds because each has four drivers operating in phase.

Regards,
Alan

Alan Lofft,
Axiom Resident Expert (Retired)