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Discussion Starter · #1 · (Edited)
EDIT: Just for anyone interested, I no longer live in this house, so the room and equipment mentioned here has changed 100%.

Well I am finally ready to start my build. I have been reading many build threads and learning from every one, so hopefully I can avoid a lot of mistakes in mine. Plus, I have Dennis's design so if I can keep from messing it up, this should turn out really well! By the way, Dennis has been awesome to work with. I would bet he has answered, literally, 150+ emails from me over the past couple of months. Highly recommended... but I dont need to tell you guys that!


I am not what I would call much of a handyman type of person, but I do plan to attempt to do as much of this build myself as possible, with the help of a contractor friend for more major items that I dont have tools for. As I said, I have been reading and learning so hopefully I can duplicate much of what I have seen in other threads.

On to the theater...

The original room was about 16'10"W x 27.5L x 9'H. The back of the room has a stairwell coming down into it and no back right wall, so I am turning the stairs, building a wall, and creating a true rectangle.


I am in the midst of the initial demolition of the existing room, and while removing the drywall I discovered that much of this room is already a double stud wall I believe. Since its a basement and the front, left, and part of the right wall is shared with the outside, it looks like the previous homeowner built new studs on the inside to keep from having to attach anything directly to the brick block skirt and to insulate... so that is a good starting point. And like I mentioned the ceiling is a separate joist system already with plenty of room above it. I did see that he connected the ceiling joists with the floor joists above, so that needs to go, but overall good "bones" to build from I think.

The equipment: (purchased or will be purchased)
Quest acoustical treatments
3 Seaton Catalyst 12s for the front three speakers in a baffle wall
4 Triad Bronze L/C/R in ceiling surrounds installed in soffits
4 Subs:
1 Seaton F2 sub in that baffle wall (replacing the Submersive HP that I have so that I can put the sub in the baffle)
1 Seaton F2 in the rear in a wall cavity under the stair landing that is behind the theater.
1 Seaton F2 in a cutout on the right side wall
1 Seaton F2 on the left side in an alcove.

Sony VW1100ES projector
Falcon screens 161" width 2:37 AT screen
Dune Smart D1
Emotiva XMC-1
Emotiva 200wpc amps for surround speakers


Starting picture after a bit of drywall demolition:
 

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Thanks for starting a build thread! This should be fun to watch. I always love seeing Dennis's designs implemented.


Do you have a particular theme or design scheme in mind for the appearance of the theater?
 

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Discussion Starter · #3 ·
I have been racking my brain to come up with some unique visual element to add to the design, but nothing is coming to mind. I REALLY like the look of the Desert Sunset theater, but my design doesn't call for columns. Dennis said I could substitute them, so its a possibility. I do have a neat acoustical element, in that a bay window cutout ( to support the bay window in the kitchen above) is going to be used as a giant custom designed unseen bass trap. The riser is also a bass trap. I don't think I can share the plans, but I will try to post some sort of basic sketch of the room.
 

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Discussion Starter · #4 ·
I like the color combo in Koach's theater here: If I dont make columns or use elements from the Sunset thread, I may make my wood and trim black like this and use a dark tan for the rest. I have attached a small file to show the layout of my theater. I dont want to attach anything larger since the design is Dennis's and I want to respect his intellectual property, but I also do want the general layout to be known as I move this thread forward.



I need to get some ideas on how to hide the fact that the treatments will stick out 2" off the walls without doing a lot of wood trim to fur out the walls to meet it. I have seen a few of Dennis's designs that incorporate elements of mine, but most have TONS of expensive wood trim that, while nice looking, isnt really my style. So I need another good way of hiding those treatments instead of just having them covered individually with fabric and meeting the drywall.

 

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Hifi - you may wish to check out Chartrand Family Theater Design & Build. That's another design done by Dennis and implemented with 2" Quest acoustical panels. I believe that the walls are fabric hung on 1" Quest track and then the panels protrude an additional inch with a small amount of wood trim. Here are some pics of his almost finished project: http://www.avsforum.com/avs-vb/showt...5#post21965215 . Maybe this is more your speed than some of the more wood-heavy designs.


Anyway, you're certainly starting off on the right foot with a design from Dennis. Best of luck with your theater!
 

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Quote:
Originally Posted by hifiaudio2 /forum/post/22005189


I need to get some ideas on how to hide the fact that the treatments will stick out 2" off the walls without doing a lot of wood trim to fur out the walls to meet it. I have seen a few of Dennis's designs that incorporate elements of mine, but most have TONS of expensive wood trim that, while nice looking, isnt really my style. So I need another good way of hiding those treatments instead of just having them covered individually with fabric and meeting the drywall.

You could build frames for fabric panels that are 2" deep. Wrap the frame in fabric and you wouldn't see any wood. If you build the frames in the fashion that is common on this forum, you would need three layers to get to 2" (3/4" + 3/4" + 1/2"). Cover the entire wall with these panels and no one will ever know that it has been built out 2".


Or you could fur out from the drywall 1/2" or 3/4" and cover everything with the usual 1-1/2" fabric-wrapped frames (3/4" x 2). This would probably be faster.


Or you could fur out from the drywall and use something like a Fabricmate track to install fabric continuously over the wall without building frames.
 

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Tuned in,....best of luck
 

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t just down the road apiece (Atlanta) so I may invite myself up when you are all finished



Awesome. I am anxious to hear a Dennis theater !
 

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Quote:
Originally Posted by hifiaudio2 /forum/post/22020441


Insulation question:


When tearing out the drywall I noticed that the insulation in the room is a faced insulation and is on the interior studs only, NOT in the cavity where the exterior sheathing is. Should I move the current faced insulation into that cavity with the sheathing and put new unfaced insulation in the room stud cavity, or just leave it as-is?


Pics attached of the area.

The facing on the existing insulation is a vapor barrier, and I don't think there is any situation in which you would want a vapor barrier to be sandwiched between layers of insulation. So moving the existing insulation back and adding more insulation in front is probably not a good idea.


Best practices for insulating a basement vary from one region of the country to another. In some parts of the country, it would be common to glue solid foam insulation board to the foundation wall, and then add fiberglass bats in the wall cavity. I don't know whether that's appropriate in your area.


I don't think a small gap between the insulation and the foundation wall is a significant acoustical problem.
 

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Discussion Starter · #14 ·
I got most of the drywall off and hauled away, and construction on turning the stairwell that comes down into the back of the room has started. We are turning it 180 degrees and building a wall along the back. We ran into a headroom issue with that new stairwell, so unfortunately that means I will have to move the back wall of the theater in a few inches to give enough room for an adequately sized landing on that stairwell. But the room should still be around 27' long (a little less after clips and DD). Dennis says the length reduction should not affect my acoustic plan nor will the slight size reduction of the riser affect the bass trap riser.


I will also be adding a new LVL to the ceiling so I can decouple it from the floor joists above. Currently the ceiling is 2x6 and has multiple 2x4's coupled to the above floor joists for support.


Even then though, we MAY have to install 2x8s for the ceiling due to the span. Its about 15.5 feet and the feeling is that that may be too long for 2x6 joists.


Hopefully all these items will be finished at the end of this week.
 

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Discussion Starter · #15 ·
Had a good week of work. We didnt end up having to shorten the room, which was great. Got the new wall built and the stairs turned with the new landing. Ceiling is prepped to install new 2x10 joists spanning the 17 foot width of the room. Very excited to see some progress.


Door question... what do I go buy? Just ask for a solid wood door of appropriate size? Not a door with something inside, like gypsum, correct? It should be 100% solid wood? ( then I will add GG +MDF + GG+MDF).


Under the area in the new landing in the picture will be one of the Seaton F2 subs. Other is in the front baffle. The "hole" for the landing sub will be just large enough for the sub ( horizontally) and will also get clips, channel, DD + GG.

Attachment 247643



Attachment 247644

 

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Door, 1 3/4 not not standard residential 1 3/8. I like Masonite safe and sound solid core. But it is not solid wood, mostly composite. Think about ordering it with a custom jamb to match your new wall thickness. If you are going to add layers you need to source an Emtek lever door latch which can be ordered for extra thick doors.
 

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Discussion Starter · #19 ·
[


I have not been posting the progress as there hasn't been a whole lot to see, but things are moving along. New ceiling framing was completed and wiring has been 90% run. Still need to run a few pieces of conduit and finish off a couple of Romex runs but basically good to go on wiring. Foam insulation will be put in this week (mainly in the "outer wall" 2x6 cavity. Drywall will be completed a few days after insulation (hiring out the drywall install).



Here are a few pics of the "sub boxes" I am building for the Seaton F2 subs that will be recessed into the wall. They aren't quite finished, but the boxes will ultimately be 4 layers. The outermost layer is 3/4" MDF, then 5/8" drywall, then another 3/4" MDF. Green glue between all layers. The first layer of drywall in the room will be run right up against the inner MDF layer that sticks out past the outer layers. Then, the second layer of drywall will "wrap" around and into the inner box. I expect this to provide a pretty sound proof box, even for the power of the Seatons!



The rear sub will be horizontal and will just barely clear my riser. The taller box will have a vertical sub on a sturdy stand. Any remaining areas in the boxes will get fiberglass filler just to cut out any resonance the box could have.


There will be one more of these boxes on the left side of the room, and the fourth sub is in the front baffle.

 

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Discussion Starter · #20 ·
Little update.. foam insulation is in! Drywall starts next Monday. Still have to get my clips and channel on the walls and ceiling. Lots to do!


You can see my two projector mounts in the picture. These are mounted to separate joists so they arent affected by bass in the room as they *could* be if mounted to the drywall/hatchannel layer. I have two mounts so that I have a little flexibility later on if my projector changes enough to need a closer mount than my Sony does. Also both mounts have about 8" or so of travel side to side so if I get a projector later on that doesnt have a centered lens and doesnt have lens shift, I can just push the mount over through the hole that is there, cut a new hole, and stick a threaded pipe through to the new location. Much better than cutting out a lot of double drywall and GG to put a whole new mount in the ceiling. Doing this means I will have to leave the mount a little loose in its track, but that doesnt seem to hurt its load holding capability at all. Just have to be sure it doesnt move before or when the drywallers are making a hole for it.

 
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