Scott, regarding my question of how to control depth in the recording, the suspicion I have after listening to the A-LFRs, is by using relative gain. If for example you mix vocals and cymbals for a centre presentation, and cut the gain of the cymbals, they'll appear behind the vocals.

As for controlling height, that remains a mystery.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated