I've posted a few times regarding the design of my basement in this and the general game room forums, so here is a new thread with the (very close to) final design:
This plan provides for a dedicated theater that is approximately 27' x 13' x (8' - 8'11") before finishing. All measurements will be reduced by furring channel, DD + GG, and the 27 foot length will be greatly reduced by the need to keep the egress window accessible in what will become storage behind the screen wall. The height in the back of the theater all the way to the beam (shown in the drawing) is 8'11" to the first floor joists. The height is reduced to 7'10" beneath the beam and the HVAC that runs across the theater between the beam and the screen wall area. 13' width should provide for comfortable 3 seating in each row, and enough length for a bar seating as the third row. Entrance to the theater will be at the rear with level elevation to the landing for the stairs outside the theater. AV rack will be beneath the stairs - either visible to the theater (more sound-proofing challenges), visible to the rest of the basement, or hidden beneath the stairs. I want to isolate and sound-proof the room enough that I can enjoy a movie: 1) noisy kids outside and above the theater won't disrupt those inside, and 2) theater sounds won't annoy or wake the rest of the family. I don't expect this theater to be perfect in terms of anything (sound proofing, acoustical performance, size), but I want it to be very good or better in as many aspects as possible.
So my biggest question right now is: what would you do around the two obstacles shown in the right wall of the theater to maintain a very good level of isolation and sound-proofing: breaker box near near the bar, and egress window behind the screen?
If you're curious about the rest of the basement, exercise room is in the upper left of the picture. Pool table and shuffleboard are shown in the main living area opposite the bar. Wine racking will be enclosed in a glass shell near the stairs and partially visible from three sides. Built-in bookshelf and storage off the stairs in the game area. No bathroom. Storage in three areas: behind exercise room, beneath stairs (depending on AV rack location), and behind screen wall.
How close can the speakers be in the false wall to the AT screen?