Hi, I am building a new home with a room specifically for a theater construction will start in the next month or two. In my current home I have a theater and will be reusing the subs, LCR and buying surrounds and heights. The room will be unique as it will have ICF walls on all 4 sides and an ICF ceiling. ICF is a sandwich of 2.5” of insulation on both sides with a 4” core of solid concrete (drawing attached). Two benefits; sound will not escape and the room will be like a bunker during a hurricane. The door will be sound deadening with a sweep. The room will have a window behind the rear row. The room is 13’ 8” W x 20’ 9” D x 8’ 4” H (I lost 10” ceiling height due to concrete ceiling). My plan is to wire for a 7.2.4 (ATMOS) and utilize it as a modified 5.2.4. I am going to have two rows of 3 movie style theater seats with a riser (7”) for row two. The picture shows couches that are dimensionally accurate for theater seats. After much research and previous experience I have decided to split (Y-cable) the side surround signal so each row has their own sweet spot. The speakers will be wall mounted, monopole and set at ear level (which will vary between the two rows). Due to the concrete ceiling I will be using height speakers as well. So here are some questions: What are the thoughts on: How to position the side surround speakers? · Slightly behind each row and angled toward that rows middle seat? · In line with the seats in each row. As stated earlier I would like 6 seats. I currently have 5 seats in mu current house on a 6” riser with a 92” screen with the bottom of the screen 35” from the floor. Due to the offset of the seats no one’s view is blocked. I am considering a screen size of 110” that is 16x9. In looking at 4K projectors it appears Optoma and Epson they are, large in their thickness and they need to hang down fairly significantly where they may be in the way. In looking at Benq they do not have this issue. Unless of course I am misinterpreting the throw calculators on the respective websites. This has me a bit perplexed. All wires will be in the wall. The equipment will be in the next room and controlled via a remote repeater. With some slack left over the HDMI cable will be about 40 ft. So a 50 footer is probably on order. If the builder does it right I will be able to pull replacement wires. I will also be using 12awg wire that is CL3. Thanks in advance for your thoughts and input.