Josh, for my home theater, I added a flexible supply line feeding 2 vents in the theater room. This is in addition to the one vent that was already there.

For the return, I installed a silent bathroom exhaust fan in the equipment rack closet that vents to the room outside. This helps move air through the room, and hot air out of the closet. This in addition to the one return already in the room.

I wouldn’t describe it as the speakers being built into the frame. The frames are 98% air. The frames are basically acoustically-transparent speaker cloth being held up in front of / beside the speaker. Because it’s acoustically-transparent material, it has virtually no effect on speaker performance (just like a speaker grill covered in grill cloth).

The front wall of the theater (behind the front speakers) is covered in sound absorption insulation. You wouldn’t want to surround speakers or fill the frame in that material. The speakers need some free space around them. The acoustic treatments should only be on the wall behind the front speakers.

Thank you for your reply, Carlton. So you actually built your speakers (left, right, and center) into the frame? Interesting. Additionally, I’ve always read that you want to make sure the wall behind your screen is completely sound proof. Wouldn’t having hollow frames around the screen impact the overall sound in your theater? Would an option be to build the frame as you have done with the speakers built in, but perhaps fill the frame with insulation? Thanks again for your time!

Thanks for the positive feedback!

The enclosures beside and below the screen are hollow frames made out of 2×4 pieces of lumber. The edges of the frames were rounded using a router and then painted black and covered with black speaker cloth. There is a separate frame covering the center, left, and right speakers. Each frame has 2 sides/faces, with the other 6 “sides” bring against the walls, floor and ceiling. Otherwise, too much light will show through the speaker cloth and you can see inside.

I hope this helps!

I think 120-inches is perfect. I sit 11 feet from a 123-inch screen.

Sorry, I don’t know the installers in that area. You’ll need to interview them and select the one that you think best matches your objectives. CEDIA is a good place to start to find well trained dealer and installers.