Quote:

That will probably cause problems with the upward-facing speaker on the 8. Muffling, reflection, that sort of thing. Per the QS8 Owner's manual you want to keep them a minimum of 12" below the ceiling.
QS8 Owner's Manual


I think you mean dolby's recommendation, I copied this from the manual you posted.
Quote:

Dolby Labs specify that with side-wall placement, the surrounds may
be located up to 20 degrees to the rear of your couch or chair relative to an imaginary line across the listening area. Keep the surrounds atleast 1 foot or more away from the ceiling, so the top-mounted woofer’s
output is not compromised.



I had a height concern as well and both Alan and Ian told me only 3-4 inches is needed. Again from the manual here,
Quote:

The Quadrants top and bottom-radiating woofers need clearance to
properly distribute sound over a wide area. If you must position them on the top of a bookcase, get extra-tall rubber feet to elevate the bottom woofer at least an inch above the surface below it. Axiom owners report quite good results using the latter approach.



Also the pic in the manual shows Axiom mounting them fairly close as well. You should be fine, give them a call...

High Gloss Cherry
M60 VP150 QS8
Open for Auditions but please don't drool on the High Gloss