Jperry-what a beautiful system!! Are your speakers on the long or short wall? Mine are currently on the short wall in the dimensions above. My room is a bonus room above the garage. The floor is carpet over suspended plywood. The walls are drywall and have that hollow lightweight ring. Grrr. I also have and 8 foot ceiling which has a barnyard top, which extends from the middle of each sidewall at an angle until it reaches the ceiling and 1/5 the way in so in essence the full 8 feet is only roughly 3/5 of the ceiling. I hope that makes sense. It’s a shame because my equipment is good, but the sound I’m getting isn’t. I have to tune this stuff asap. BTW how far out is the minimum distance requirement with the dappolito design? How far away are you listening? Are you sittng up against the front wall? When I’m anywhere but the searing position I don’t get that horrible mid bass nasaly hump. It’s completely coloring the sound, and not in a good way. I will definitely look into to the sumiko master set.