I'm sure it makes some difference too that right now I'm on a bare concrete slab and insulated walls with no drywall. Not sure the physics of it as the last physics class I took was 20 years ago but with one side being open, no dividing wall, the cubic space the sound is filling is essentially the entire basement right now, almost 20,000 cubic feet

LFR1100
VP180HP
EP600
M3 In Ceiling x 4
M5OW
M2 - Atmos rears
ADA1500.5
M3 Outdoor Speakers
ADA 1000.8