I'm moving into a new home (20 yrs old) next month and making some plans for a new HT. The attached img shows the floor plan layout I'm contemplating. I appreciate any feedback you'd care to provide.
Notes about the diagram:
Planned space is in a basement, about 1/2 of a large open room. HT space will be about 13W x 20L x 8.5H. The basement is fully finished now. Sheetrock walls, carpet floor. Not sure about the insulation yet, but its an R2000 home and very well insulated overall. There's only two small windows in the space, one will be covered by the screen wall, the other is at the far back of the room and will have blinds.
The room is long (40 ft) and for various reasons I don't really want to completely wall off the theater area. One reason is because of the major change that would be required to replace that giant (8 ft long!) pocket door along the left side.
The exact location of the sub will be determined by measuring the response in the room. But I think that somewhere along that alcove wall should be suitable. The rest of that space will have shelving for media storage, maybe some posters on the wall.
Ceiling height is about 8.5 ft. Currently in suspended ceiling tile that's in need of some repair. I plan to stick with that type of ceiling. I will pull down the tiles, add insulation above, run some wiring, replace damaged tiles and paint the tiles and T-bar a med-dark blue.
The grey shaded area represents a soffit in the room that encloses HVAC ductwork. It drops about 11" down into the room. Bottom of soffit is finished with ceiling tiles. I'm undecided about building a matching soffit on the other side for cosmetics. One idea is to make a soffit around the theater part of the room, with the back soffit at about 20' from the screen to visually separate the theater area from the rest of the space. That could also provide a place to mount the projector and rear speakers. With a nice moulding/ledge and some rope lighting up there, it could make a nice effect with the dark ceiling colour I have planned.
The front speakers will be concealed by a simple proscenium. Wood framing covered by fabric. Side speakers will be surface mounted on the walls. I like the idea of columns but don't think I have a wide enough room to do that. I'm a bit concerned about the R.Surround speaker being too close to people's heads when using the front stair up the riser. Rear speakers will be ceiling mounted. Is there any case to be made for mounting them on the far back wall? That just seems too far away.
The general plan for acoustic treatment is to put acoustic insulation along the screen wall, thick fibreglass insulation in the ceiling, leave the carpet and put some decorative acoustic panels (made from rigid fibreglass panels wrapped in fabric) at first reflection points along the sides. If needed, I'll install some bass traps in the far back corners and some kind of diffusing panels on the far back wall. Mostly, I'm taking a wait-and-see (listen) approach - I will install the equipment, have a listen, take some measurements and see if there's anything drastically wrong acoustically and then deal with it then.
Projector will most likely be a Z2 and the diagram shows a couple proposed screen sizes. Again, I'll set up and test before making a final decision. I like the idea of a 2.35:1 screen and some simple dark fabric curtains to mask the sides.
Looking forward to any comments, criticisms or insights you'd like to share.