Hi Mark,
Excellent illustration!
As you know, I advise against recessing any of our Axiom speakers into any entertainment center cubbyholes because of the degraded sound quality that will likely result.
The arrangement you show avoids the problem of defraction and interference effects from the surrounding cabinetry by having the front edge protrude beyond the shelf edge by a half-inch or so.
Axiom's forthcoming new T-series of in-cabinet speakers are intended for custom-mounting in cabinetry and entertainment centers. The front baffle on those models (the T80, T60 and T150) also protrudes slightly to avoid possible diffraction problems.
Regards,
