I'm almost ready to start construction on my theater, and one last detail is causing me some grief. I can't decide if I need to try to move my door, or try to make it work where it is. The issue is my door will be all the way in the back corner. Going into the theater I don't think this is a problem, but on the theater side I'm not sure if there will be room for clips+channel+DD+GG+acoustic treatments. The rough door opening is about 3-1/2" from the back wall, and is about 38" wide.
Before you say just move it, the walls in this hallway support a set of stairs and landing directly above it, so it may not be that simple. Also, the opening is currently centered in the hallway. So if I move the door, now it's no longer centered. The small room to the left of the doorway is intended to be my equipment closet, so I could definitely use part of that space for a door.
Here are my questions:
1) How much space is necessary between my door and wall to allow for sound isolation and treatments. I think I'm looking at about 2-1/2 to 2-5/8" for clips, channel, one layer of OSB, and one layer of drywall. But not sure about the thickness of the treatments on the back wall.
2) I'd like opinions on moving the door completely into the equipment closet, and possibly making an arched opening or cased opening going into the area with the door.
As promised, here are the pics of the doorway, and a Sketchup model showing the stairway and equipment closet in relation to the theater.
Outside Theater looking into the theater through the proposed door. The equipment closet is on the left.
Inside the theater looking out the doorway. The equipment closet is just past the doorway on the right in this picture
The Sketchup model showing showing the area in question