I was thinking about that this morning in a half awake daze. A room out in the woods (no wind or animals allowed) with walls and ceiling that rise up hydraulically to open everything up. A flat concrete slab, polished perfectly flat, a foot thick loaded with rebar and a dozen rebars driven 10 feet into the earth bonded together and poured into the concrete for super low impedance earth. A handful of subs in stereo up front to 50Hz and all around to go lower to keep the bass jumpin... Oh and while I'm imagining, throw in a couple dozen nubial wood nymphs wandering aimlessly in the forest, within view but not close enough to bother me.
Charles, why do you think the Maggie bass was so good outside? Dipole directivity? House reflection? Did you spend time tuning the distance, or you just knew from experience the distance they like best?