I like that a lot. Well done. Do you have any construction photos of the screen wall or basement? I assume your subs are behind the screen wall as well? How do they perform behind the solid surfaces?
Thanks...I have to give the credit to my Dad. I came up with the design and he figured out how to build it all. In some of the pics below you can see how my subs are oriented back there. We just threw up some plywood as a finishing piece so I wouldn't have to dress up the subs, add panel molding to them etc. They perform fine. They are firing back towards the wall, about 8 inches off the wall. I read somewhere that the F20 should be around 18in off or so, however mine sound pretty good so far and shake the whole basement (approx. 1000sqft). Still have some calibrating to do. The Velvet border is permanent, as we wrapped 4 separate pieces of MDF and then nailed in place. The screen is wrapped around a wood frame as you can see in the last pic (that is showing the back side of the screen obviously). The screen sits right in place.
I know a lot of people use a French cleat system to hang their screen, however I went a different route. As you can see in some of the pictures, we used small pieces of wood in each corner as stoppers so the screen would sit at a specific depth. Then used magnets to keep everything level and as an extra measure of security, even tho it is a very tight fit. Just makes me feel better when the magnets clip and I hear everything go together.