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I actually approach things a little differently. I try to use some type of diffusion/absorption (ex RPG Diffsorbers) in my first reflection region. Works really well.
 

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Hi Frank,

I guess I am a little lost as to what you intend to do? Is the second drawing the one you intend to build, and if so, is this a basement or the upstairs?
 

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Hey Frank,

Ok. What is the area (appears to be closet or storage underneath stairs?) adjacent to the stairs used for? It isn't labeled.

Thanks
Shawn
 

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Hi Frank,

Yes, you can build the wall, but I would leave it acoustically transparent (relative term) and not insulate the wall itself. Do it behind the speakers. However, this all depends on how much depth you have allowed for your speakers to be placed. In addition, using standard pink insulation is nowhere near dense enough to provide any adequate sound absorption in the lower mid-range frequencies (the middle of the audio spectrum is 500 Hz). Place it on the wall behind the speakers, but this leads to the next problem as you need high efficiency absorption that can handle speakers being close to it due to SBIR...again this leads back to how much room you have left for your speakers between the AT wall and your back wall. Regarding other design issues, I would look at possibly trying to make the room as rectangular as possible and leave the doorway you have depicted near the front right side out of the equation...or at least place a door there. This looks to be right around your first reflection point which is highly important. You need to place treatment right around there, but I would not go with strict absorption at this location as you will literally collapse the front sound stage and make the room sound as big as it really is. I aim for trying to expand beyond the walls. Also, leave your speakers enough room to play with them. Strictly adhering to a specific spot will not yield great sonic benefits for you unless specifically designed to do so. Hope this helped!
 

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Hey Bryan,

You are absolutely correct. I know that you know this, but for the benefit of others, you can achieve the same absorptive qualities as rigid fiberglass provided it is thick enough. You eventually achieve the same density as rigid ductboard but you achieve it through volume. In addition, it is soooo much easier to work with rigid fiberglass since...well, it's rigid! My thoughts are, stick with the rigid stuff outside walls and enclosures, and the pink stuff in the walls and enclosures...you'll be much happier. :D
 

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^^^^

Uh, oh...now you have me confused again. :scratch: Are you saying the the front wall is just going to be a wall, or is it an AT wall? This leads to a whole host of other questions. What type of screen are you going to use...projector...rear projection...panel? Are you building the wall just to hide acoustical material? I thought you had intended to hide your speakers behind the wall, so I am a bit confused as to what you are building the wall for exactly?
 

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Or...

you could make your side elevations look something along these lines...



Just for your reference, there are no "golden" rules regarding panel dimensions.
 

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Is that wood paneling? Isn't it reflective?
It is reflective and it is also absorptive (depends on how thick and what type the wood is :)), but are we all that concerned with reflectivity below a chair rail? To some degree yes, but mostly no. Don't take the above drawing to scale nor as a true room. It was not intended to be that way. All it is depicting is some ideas. No sound aspects of sound analysis was done for this room.

can I put 703 in the 2x4s framing the front wall or does it need to go on top of it?
No sure what you are quire asking here, but if you plan to permanantly enclose 703 inside of a wall, I would not do it. If it gets wet, it will cause mold to grow. Good luck!
 

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You can do some wood on the bottom but not with 4" or so of ear level. Some folks make the inlays cloth and just strips of trim to frame it.
Or it could be sound panels framed into wood panelling. :)

Bryan is correct. Don't take my drawing to scale as it isn't. It is just intended for interior ideas. I give you the cart, but not necessarily the horse. :)
 
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