After lurking a long time on this site (and after occasionally posting on the rare occasion where I thought I might have something worthwhile to add) and after learning all kinds of great information by following the awesome construction threads in this area, it looks like it's about time for me to start my own.
A little background on my space. My wife and I built our house last spring/summer and moved in just over a year ago. We worked with a friend who is a custom builder and let us basically design the house ourselves. The theater, before drywall, is 23'10" x 17'3" x 8' ceilings and has a 12x12, 14" deep pit in the floor for seating instead of building a riser. I am planning on doing insulation/doubledrywall/GG construction... No RSIC clips because my trusses are 24" on center and it sounds like the gains from using RSIC on the ceiling in this situation are marginal, especially when one factors in the cost.
Currently I am at the insulation/electrical/HVAC stage. I can't completely isolate the HVAC, but what I am planning is to have my heat enter the room through flexiduct in a soffit, go through a smarthome thermostat-controlled damper, and then through duct-board constructed ductwork, which I understand acts as a muffler for sound (per Sandman's thread). Return will be at floor level on the other side of the room. Additionally, I'm thinking of installing at least one, maybe two completely independent lines with thermostat-controlled fans which will suck heat out of the room (soffit level) and send it into other basement rooms if and when the room starts getting warm from people and equipment. Of course, to avoid creating a vaccuum with this, I'll also provide a flexi-duct airway into the room from an adjoining room (floor level). This all makes sense in my head but if it's completely half-baked, someone please tell me now!
My biggest question, and my main reason for starting this thread now rather than waiting until I've finished more of the room, regards the placement of the doors to the room. The room features a main entrance (on the right in the picture below) and an equipment room (door on the left in the picture below). Both of these doors are close to the back corners of the room, where I should be installing bass trapping (although I can do trapping in the front corners and upper rear soffit corners).
I can move the equipment room door 4-5 feet in, essentially flipping the side of the equipment room that the door is on. Also, the main door to the room, as framed, is 48", giving me 14" or so to move that door off the corner and further towards the front of the room. The problem with both of these options is that moving the equipment room door forces me to put my rear speakers in the corners, which, with my room dimensions, is a pretty wide placement. Similarly, moving the entrance door towards the front of the room will force me to have my side surrounds (polk R15's) further forward than I would like (probably well in front of the second row of seating - if I leave the door towards the rear corner, I will frame in the front 14" of the door to give me more wall there). Here is the picture:
So the question for the experts is: Do I let bass-trapping take priority over speaker placement -- considering I can bass trap in both front corners and in the rear corner soffits -- or do I keep the doors towards the corners on the assumption that the front and soffit trapping I have will be sufficient?
(FWIW, here's a picture of the front of the room as well):
Thanks in advance for everyone's help and support. If this thread results in one good idea or learning moment for one forum member, I'll figure it was a success. Hopefully it, like all the other construction threads have done for me, will have lots of these "successes!"