He has 2 500s. The other one, not in the picture, is on the left side below the mid-QS8 near the seats. He has plenty of bass and headroom with a pair of those subs in that large room. However, with those open areas it won't pressurize the room and give that visceral impact and slam the way the 500s did in my sealed HT. I'm not sure he cares.

John