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post #1 of 174 Old 07-07-2017, 10:18 PM - Thread Starter
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Deadwood II Theater Lives

It has been two years since we sold the original Deadwood theater (and the house it lived in). And now, Deadwood II lives: a smaller house with a larger theater -- seems about right!

The theater is operational, using all the same kit from the previous, minus the AV7702 Atmos processor which I sold at the time. The 4 Tannoy's are indeed here, on the ceiling, awaiting an Atmos processor yet to be decided [ETA: Anthem processor installed for Atmos and DTS:X 7.1.4 processing]. This ceiling is 2' higher than before, making it easier to hide speakers. Key improvements in the new theater:
1) More space. Room is wider, longer, and taller.
2) Wider screen.
3) A separate “projection booth” gives easy access to the equipment rack and PJ, and removes their noise and heat.
4) Improved isolation from the rest of the house. (Separate wing.)
5) Improved door seals and latch.
6) Improved window plugs.
7) Triple layered walls: original 1/2" sheetrock, 1/2" OSB, 5/8" sheetrock, Green Glue.

The room is quieter from outside noise and virtually inaudible in the house -- can play any time of day or night. Happy wife!









The equipment room. Easy access to all the business ends of the gear and wiring. That's another window plug at the back.








Physical
Room Dims

19.4' L, 17' W, 10' H (3300 cuft)

1’ riser, full width, 7’ deep
Screen mounted 2’ from front wall, 28" above floor

Eyes to screen front row: 115” (9.6’) (53° view angle)
rear row: 176” (14.8’) (36° view angle)
Front row eyes viewing angle to top of screen, 16°

Seating
Pottery Barn
Turner Series, Legacy Dark Caramel
4 armchairs, 1 loveseat, 2 ottomans

Carpet/Pad
Evans Black Collection (division of Shaw) from Carpet One
Pattern: Bended Bough
Color: Chalice (dark gray, gray highlights)
3/8” felt pad

Wall Paint
Limousine Leather (black), Home Depot

Lighting/Dimmers
Globe Electric 4” cans.
19 “MR16” LED lamps, 3000°k
Lutron RadioRA2 dimmers, 5 zones

AV System
Projector: JVC DLA RS520

Screen: Stewart 115x49” 2.35 Cima Neve 1.1 gain

Speakers / Positions (az/elev)

L/R Aerial 7B, ±32º, 0º
C Aerial CC3B, 0º, -7º
Sub Hsu ULS-15 Quad Pack

4 surrounds KEF Ci200QS in-walls in custom enclosures
Lss/Rss, ±80º, 11º
Lb/Rb, ±130º, 10º

4 heights Tannoy Di6 DC
Front heights ±47º, 42º
Rear heights ±138º, 39º

7.1 AV Processor: Classé SSP-800
7.1.4 AV Processor: Anthem AVM 60
2-ch subwoofer processor: MiniDisc OpenDRC-AN
5-ch amp: Anthem MCA 50
6-ch amp; Classé CAV 150
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Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen

Last edited by Roger Dressler; 09-02-2017 at 03:32 AM. Reason: Add equipment room
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post #2 of 174 Old 07-07-2017, 10:19 PM - Thread Starter
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Door seals and more

My first theater has a nice 300 lb door with Zero Int'l seals. But there were two main problems. 1) Sound leaked. 2) Had to slam it to latch it against the seals. Thud!

This time the theater door is a standard 100 lb solid core slab. Same Zero International 170AA adjustable seals are used for the sides and top. But rather than the ubiquitous “automatic bottom,” am instead using the simple 485A seal attached to the bottom of the door. The seal contacts the threshold and overlaps the side seals, thus preventing gaps that occur with the automatic unit. It's a better seal. [Note to self: Next time use the Zero 870AA instead of the 485A as it allows for adjustment in place in case the door warps. If that happens, my remedy is to adjust to location of the top later of the threshold, which is less convenient.]



To address the slamming issue, I searched for a compression latch. The door handle’s latch has a roller bearing that contacts a tapered strike, compressing the seals as the latch rotates into the lock position. No slamming needed to get a tight seal. The latch and strike plate are made by Miwa Lock Products, Japan. RSH-001 handle and SKB strike were about $175.





This same door happens to be right where I wanted to put a surround speaker. To solve that I mounted the speaker unit on hinges, and the door has an arm attached that pulls the speaker into position when closed.



Another kind of door seal, on a much smaller scale, is the PJ port. I took Mr. Erskine's advice and made both sides of the glass accessible from the theater, for cleaning. Here is the frame before paint/installation, seen from the theater side. It holds a piece 8" x 10" optical quality glass (Edmund Optics). Result: no port noise complaint.

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Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen

Last edited by Roger Dressler; 07-09-2017 at 03:18 PM.
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post #3 of 174 Old 07-07-2017, 10:21 PM - Thread Starter
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Acoustic treatments

Ceiling
The ceiling acoustic treatment is divided into 2 halves, front and rear. The rear half has a 2x4 frame that nicely holds 5.5” Roxul batting with a 6” air gap to the ceiling. Beneath the Roxul is a layer of cedar lattice plus landscape fabric. The lattice is screwed to the 2x4 frame.



The front half of the ceiling is covered mostly with 2” absorber panels (there's a 10” gap to the ceiling) except for the fabric panels covering the front height speakers, and a pair of diffusors. The diffusers are modeled after Alphacoustic Difuso type A, which not only looked interesting, but also seemed like a good DIY candidate. I cut up a sheet of 2” rigid foam (Foamular Insulpink), then glued the pieces to a couple sheets of 2’x6’ OSB. The 4x8’ foam panel cost just $29 at HD, so it was worth the experiment. Cuts like butter on a table saw.



Side Walls
Starting from the screen, each side wall starts with a pair of GIK 4A Alpha Diffusors to handle the first reflections of the nearest speaker and center speaker. They have been wrapped in speaker cloth to hide the bare slat edges. Next is a GIK 244 absorber to attenuate the opposite side speaker first reflection.

Completing the side wall are diffusors made from wine barrel staves. A lucky result of living in Oregon wine country. These were discards.



The you see the side surround speaker, mounted in an angled baffle. The speakers were located at 80° azimuth rather than the more traditional 90° so as to improve the sense of envelopment.Below is a picture of the Right Rear speaker with the grill removed. That's the KEF 8" coax in there.



The bare wall between the side and rear surrounds will soon be occupied by another DIY diffusor made of wine barrel staves. I am living in Oregon’s Willamette Valley wine country, and am the happy beneficiary of a generous winery who was disposing of said staves.

Above all are three GIK PolyFusors. Just there to kill slap echoes -- but they look cool, too.

Rear Wall
The center of the rear wall has a pair of 2” absorber panels, flanked by another pair of Alpha Diffusors. Aside from the entry door, I made a door for the equipment rack (same dual layer plywood & Green Glue sandwich as the window plugs). It has bronze spring seals all around, which holds the door snug and prevents equipment room noises from intruding. I no longer hear the Apple TV HDD, the Oppo or Sony BD optical drives, the PJ fan, or the PJ's lens wobulator for eShift. Just blissful silence. Now that's acoustic treatment!




Front wall
The screen sits on a false wall frame 2’ from the wall behind. The space is currently unoccupied except for a pair of subwoofers. I wanted to leave room for more/larger subs if deemed necessary in future.

Other than the 3 window plugs, the only treatment is 2” of Linacoustic covering the entire wall, including the plugs. The screen is surrounded by black velvet panels.
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Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen

Last edited by Roger Dressler; 08-01-2017 at 03:45 PM. Reason: Added stave diffusors
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post #4 of 174 Old 07-07-2017, 10:43 PM - Thread Starter
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Window plugs

The weakest aspect of the wall system in terms of noise isolation is the windows behind the screen (builder required). I learned that blocking light is easy. Sound, not so much. The 2” fiberglass panels I used before proved that to me.

This time I made plugs with two layers of ¾” plywood and Green Glue. To seal them into the window frames, I attached strips of 3/8” felt underlayment along all the edges (blue in the diagram). When the plug is inserted into the window, the felt folds over the edge, and is squeezed tight. It makes a good seal, and holds the panel in place securely. Can be removed if desired -- no screw holes.







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Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen

Last edited by Roger Dressler; 07-10-2017 at 06:45 PM.
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post #5 of 174 Old 07-07-2017, 11:14 PM - Thread Starter
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Hvac

This theater has its own ducted mini-split. Loved it in the first theater, love it again here. It's absolutely dead silent. The air handler is in the attic, above the entry hall.





The return air passes through the equipment room, thus carrying away excess heat. It's typically around 5-10 degrees warmer in there than the theater.
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Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen

Last edited by Roger Dressler; 07-08-2017 at 12:39 AM.
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post #6 of 174 Old 07-07-2017, 11:22 PM
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Fabulous new theater. Thanks for the detail on the unique items.
Revisited your old theater thread many, many times.
Looking forward to a performance comparison of old vs new.
Honored to be the first poster in your new build.
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Last edited by DavidK442; 07-07-2017 at 11:25 PM.
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post #7 of 174 Old 07-08-2017, 04:11 AM
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Eggzellent!
One can't accept less than perfect from a guy like Roger.
Very tasteful with plenty useful details.
I too have been visiting the old thread regularly and now I'm subscribed to that one as well!
Everything hand built, right?
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post #8 of 174 Old 07-08-2017, 11:30 AM - Thread Starter
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Quote:
Originally Posted by gerchy View Post
Eggzellent!
One can't accept less than perfect from a guy like Roger.
Very tasteful with plenty useful details.
I too have been visiting the old thread regularly and now I'm subscribed to that one as well!
Everything hand built, right?
Thank you, Tomaz. I hired the carpet installation but did the rest myself. I think that pretty much proves that perfection is not required to make me happy.

I found it valuable to review Norm Varney's checklist to keep the key goals in mind during the design/build process. (He's from Kinetics Noise Control) I cannot say I met every point 100%, but where I departed, I did so knowing the tradeoff.

Norm Varney 15-point checklist
1 Matching center speaker
2 Electrical grounding, routing, connecting
3 Don’t EQ average across all seats
4 Dedicated HVAC
5 Provide adequate noise isolation
6 Provide adequate acoustic treatments
7 Maintain loudspeaker distance
8 Avoid sitting near walls
9 MLP centered between L/R
10 Avoid excessive mid/hi freq absorption; have adequate bass absorption
11 Adequate shell construction for containment
12 Avoid poor distribution room modes
13 Proper screen width for soundstage
14 Proper seat back height
15 Proper subwoofer placement

See Widescreen Review, Issue 203, Jan 2016 for more details.
Download of the article available here.

Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen

Last edited by Roger Dressler; 07-10-2017 at 01:55 PM.
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post #9 of 174 Old 07-08-2017, 02:21 PM
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Quote:
Originally Posted by Roger Dressler View Post
I think that pretty much proves that perfection is not required to make me happy.
I kind of doubt a man with your background would accept compromise.
Are these original Kef grills on your surrounds?
How thick is the treatment near L and R speakers? Looks like 10"? Or is there an air gap between?
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post #10 of 174 Old 07-08-2017, 02:38 PM - Thread Starter
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Quote:
Originally Posted by gerchy View Post
I kind of doubt a man with your background would accept compromise.
Well, I do admit to having strong preferences (however selective). I'm sure that's quite normal around these parts.

Quote:
Are these original Kef grills on your surrounds?
They are present, but I painted them black and wrapped them in grill cloth, not for cosmetics but to stop them from buzzing. They are not well anchored via the magnets. That's a weak point of the design. I also added a thin foam gasket around the perimeter of the baseplate to improve the junction with the cabinet, too. Now they work quite well. To be fair, I've paid a lot more for in-wall speakers that had the same weaknesses.

Quote:
How thick is the treatment near L and R speakers? Looks like 10"? Or is there an air gap between?
The GIK 4a Alpha diffusors are 4.5" thick, and the 244 absorbers are 5.5". The curved Polyfusors are 5.5" max. All are flush on the wall.

Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen
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post #11 of 174 Old 07-09-2017, 05:03 AM
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I'm giddy knowing I'll have a chance to visit/hear the new Deadwood II theater!

Roger.......these snippets of information indicate great moments in home theater engineering!

I'm on my phone sitting on a deck looking at a beautiful lake in Minnesota right now......as soon as I'm back to Oregon I'll give you a call!

I'm really, really looking forward to seeing room!

BTW......nice call on those KEF's! Looking forward to hearing them.....
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post #12 of 174 Old 07-09-2017, 10:37 AM
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Nice theater!

How did you address soundproofing the ventilation system for the minisplit? Or did you bother?
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post #13 of 174 Old 07-09-2017, 12:32 PM - Thread Starter
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How did you address soundproofing the ventilation system for the minisplit? Or did you bother?
Thanks.

Did not do anything. The sound path from the roof vent through the air handler, then through the feed ducts into the room is enough to kill any sound flow. If there is a loud noise source outside -- like my neighbor's Thursday morning visit from the leaf blower fairy, I can tell it is out there through the window plugs, not the air vents.

Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen
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post #14 of 174 Old 07-09-2017, 02:46 PM
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Looks fantastic!! Can't wait to come down and check it out. Be happy to help with any projector tuning as well!
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post #15 of 174 Old 07-09-2017, 03:27 PM - Thread Starter
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Looks fantastic!! Can't wait to come down and check it out. Be happy to help with any projector tuning as well!
This is my second PJ, the first being the RS10. This one is appreciably brighter, even on the larger screen, low lamp, with manual aperture set down a few clicks. Quality looks great right out of the bottle in THX mode. But I am sure some tweaking might help cull more shadow detail without graying the inky blacks.

I'd be honored for you to visit!

Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen
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post #16 of 174 Old 07-09-2017, 04:12 PM
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Quote:
Originally Posted by Roger Dressler View Post
Ceiling
The ceiling acoustic treatment is divided into 2 halves, front and rear. The rear half has a 2x4 frame that nicely holds 5.5” Roxul batting with a 6” air gap to the ceiling. Beneath the Roxul is a layer of cedar lattice plus landscape fabric. The lattice is screwed to the 2x4 frame.



The front half of the ceiling is covered mostly with 2” absorber panels (there's a 10” gap to the ceiling) except for the fabric panels covering the front height speakers, and a pair of diffusors. The diffusers are modeled after Alphacoustic Difuso type A, which not only looked interesting, but also seemed like a good DIY candidate. I cut up a sheet of 2” rigid foam (Foamular Insulpink), then glued the pieces to a couple sheets of 2’x6’ OSB. The 4x8’ foam panel cost just $29 at HD, so it was worth the experiment. Cuts like butter on a table saw.



Side Walls
Starting from the screen, each side wall starts with a pair of GIK 4A Alpha Diffusors to handle the first reflections of the nearest speaker and center speaker. They have been wrapped in speaker cloth to hide the bare slat edges. Next is a GIK 244 absorber to attenuate the opposite side speaker first reflection.

The you see the side surround speaker, mounted in an angled baffle. The speakers were located at 80° azimuth rather than the more traditional 90° so as to improve the sense of envelopment.Below is a picture of the Right Rear speaker with the grill removed. That's the KEF 8" coax in there.



The bare wall between the side and rear surrounds will soon be occupied by another DIY diffusor made of wine barrel staves. I am living in Oregon’s Willamette Valley wine country, and am the happy beneficiary of a generous winery who was disposing of said staves.

Above all are three GIK PolyFusors. Just there to kill slap echoes -- but they look cool, too.

Rear Wall
The center of the rear wall has a pair of 2” absorber panels, flanked by another pair of Alpha Diffusors. Aside from the entry door, I made a door for the equipment rack (same dual layer plywood & Green Glue sandwich as the window plugs). It has bronze spring seals all around, which holds the door snug and prevents equipment room noises from intruding. I no longer hear the Apple TV HDD, the Oppo or Sony BD optical drives, the PJ fan, or the PJ's lens wobulator for eShift. Just blissful silence. Now that's acoustic treatment!




Front wall
The screen sits on a false wall frame 2’ from the wall behind. The space is currently unoccupied except for a pair of subwoofers. I wanted to leave room for more/larger subs if deemed necessary in future.

Other than the 3 window plugs, the only treatment is 2” of Linacoustic covering the entire wall, including the plugs. The screen is surrounded by black velvet panels.


Great looking theater! I was wondering what you used for the wood beams on your ceiling. Are they real or "faux"? I have a steel I-beam running the width of the theater I am going to trim out with wood to give the appearance of a wood beam. I plan on adding a few more across the ceiling for aesthetics. Also, is the cedar lattice for holding the roxul up or is that for appearance/acoustics?

I also really like your color scheme and seats, but won't show my wife as I have her talked into traditional theater seats.

Very nice work!

Dave


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post #17 of 174 Old 07-09-2017, 04:37 PM - Thread Starter
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Originally Posted by DaveyK View Post
Great looking theater! I was wondering what you used for the wood beams on your ceiling. Are they real or "faux"? I have a steel I-beam running the width of the theater I am going to trim out with wood to give the appearance of a wood beam. I plan on adding a few more across the ceiling for aesthetics.
Thanks, Dave.

The faux beams are rigid foam. Very light weight. Saw them on HGTV It saved me from having to fabricate from wood panels. They worked out fine, but I think wood would have been less vulnerable to the rigors of the construction process. My first theater has real beams milled to my spec, but I did not want to go that route again due to cost and weight -- plus I wanted to run lighting in them this time.

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Also, is the cedar lattice for holding the roxul up or is that for appearance/acoustics?
The lattice prevents the Roxul from falling out, allows sound to pass through, and it looks pretty good, too. It serves multiple purposes.

What I liked about this lattice is that every contact point between two cross members is factory glued, then stapled. Plus they used all straight, clear cedar. It cannot be skewed out-of-square, nor does it buzz with vibration. Would have been a tedious project to build them myself.

Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen
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post #18 of 174 Old 07-09-2017, 05:18 PM
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Superb! Nice work Roger. Love the ceiling!

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post #19 of 174 Old 07-09-2017, 05:46 PM - Thread Starter
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Superb! Nice work Roger. Love the ceiling!
Thanks. I took inspiration from PeterM's ceiling.

Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen
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post #20 of 174 Old 07-09-2017, 05:50 PM
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Originally Posted by Roger Dressler View Post
I took inspiration from PeterM's ceiling.
I was going to ask.

I assume the treatments are all DIY? i.e. you didn't hire anyone?

As with your last room, its not often you see treatments employed in a manner that dont look "just hung on the wall", very nice integration.

....someone needs to ask about the shortlist for the processor?

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Hi Roger,

Room looks great! I have a question about "7) Triple layered walls: original 1/2" sheetrock, 1/2" OSB, 5/8" sheetrock, Green Glue."

So I know all the debates about doing green glue and double layers and such without going all out with clips and channels. So it seems you didn't do that and are happy with the results! Can you elaborate on your experience a bit and confirm did you use green glue between all layers? I am asking because my new theatre will be upstairs so I think all out with clips wont be worth it but think doing a double or triple layer like you will get me happy enough.

Thanks!
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post #22 of 174 Old 07-09-2017, 06:11 PM - Thread Starter
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Quote:
Originally Posted by Elill View Post
I was going to ask.

I assume the treatments are all DIY? i.e. you didn't hire anyone?
Hired no one. The sides and rear walls use GIK panels. Will soon add DIY barrel diffusors flanking riser.

Quote:
As with your last room, its not often you see treatments employed in a manner that dont look "just hung on the wall", very nice integration.
And yet, that's just what I did.

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....someone needs to ask about the shortlist for the processor?
AVM 60 at top, but further down are MP 50, and whatever comes next from Classé.
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Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen
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post #23 of 174 Old 07-09-2017, 06:32 PM - Thread Starter
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Quote:
Originally Posted by cheezit73 View Post
I have a question about "7) Triple layered walls: original 1/2" sheetrock, 1/2" OSB, 5/8" sheetrock, Green Glue."

So I know all the debates about doing green glue and double layers and such without going all out with clips and channels. So it seems you didn't do that and are happy with the results! Can you elaborate on your experience a bit and confirm did you use green glue between all layers? I am asking because my new theatre will be upstairs so I think all out with clips wont be worth it but think doing a double or triple layer like you will get me happy enough.
I did indeed apply GG to each of the 2 added layers. 6 of the 5-gal buckets in all.

I based my decisions on the previous room experience. There I did nothing to any surface other than the floor and one side wall (sheetrock and GG), as those contacted living areas, whereas the rest were external walls/roof. This time I wanted to expand the benefit to the whole envelope.

In the new house, before any theater work started, if I hit the sheetrock on the side wall (a strong fist-pound), I could feel the wave as it rolled to the front of the room and came back. Now, with the layers added, it's much more inert. No lingering motion. That's what I was hoping to achieve, to minimize sympathetic vibration from bass, and prevent having that energy come back into the room.

Of course it also reduces sound transmission, but I cannot tell you how that might compare with clips/channels. My understanding is that there's a point in the LF where the benefit of the decoupled wall goes away. In other words, that is not the end-all to isolation either if we are looking at bass leakage outward.

The floor was the weakest point in my first theater. There was a kitchen/living room right below, often wife occupied, and lots of can lights in the ceiling. I added a couple layers of OSB, GG, which helped but was not as much as I wanted. So this new room is on the ground floor of a single story house. Very little common wall.

Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen
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post #25 of 174 Old 07-09-2017, 08:47 PM
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Quote:
Originally Posted by Roger Dressler View Post
Thanks. I took inspiration from PeterM's ceiling.
Thought it looked familiar !

Love this idea -



Brilliant !!

Cheers,
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post #26 of 174 Old 07-09-2017, 08:59 PM - Thread Starter
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Originally Posted by Peter M View Post
Love this idea -

Brilliant !!
A new form of logic steering.
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Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen
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Hi Roger - amazing job! And even more kudos for having done all the work yourself. I love the way everything is integrated - the treatments, the rack door, the ceiling etc. I especially love that really neat trick you did with the speaker that is behind the door - very clever. Every time I read one of your posts I learn something - you'll be seeing that Norm Varney checklist in my own (UK) build thread soon Best regards, Keith.
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post #28 of 174 Old 07-10-2017, 05:20 AM
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Nice work again Roger.

How do you know what acoustic devices to put up? Are you a pre and post measurments acoustics person or is this just based on experience and your ears on what works?
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post #29 of 174 Old 07-10-2017, 07:24 AM
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Roger: I really love your new theater. Great job!!! I'm envious of the 10 foot ceilings. My current theater has 8 foot ceiling and most certainly posses some interesting compromises.

Three items: (1) Your door controlled surround speaker placement is an amazing and ingenious piece of engineering. Very clever; (2) Use of a mini split HVAC system was a great idea. I have been struggling with temperature control in my equipment room since the beginning. Unfortunately, the wall of the equipment room faces due west AND has 3 huge windows in it so even without the equipment on but the door closed, it can get really hot in there. I do have an AC vent but the thermostat is in the theater. It would not be on the top of my list but I may re-consider taking the theater and equipment room off of the house AC system and putting in a mini split. Thanks for the idea; and (3) related to the huge windows in my equipment room, I have them all covered with the same 2" pink stuff that you do. My issue is neither light nor noise but HEAT. They still "leak" hot air as I only have tape around the edges. I really like your idea of setting them into the window frame and would like to replicate what you have done. In looking at your diagram I'm not 100% sure what everything is:



I think I know what some of these are but if you could tell me what the letters represent, maybe I can better understand how to build them. I also need some clarity on how you get the material (F?) to wrap around the insert when you put it into place? And where are you screwing the thing into the window?

Thanks ...... and great job.
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post #30 of 174 Old 07-10-2017, 03:38 PM - Thread Starter
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Quote:
Originally Posted by Curves View Post
How do you know what acoustic devices to put up? Are you a pre and post measurments acoustics person or is this just based on experience and your ears on what works?
Pre-measurements for anything other than bass modes seems pretty useless to me. Not because they are useless to someone skilled in the art, like Nyal or Keith Yates, but because I would not know what to do with that info.

I did no post-build measurements to check for ETC, just basic responses. I do a lot of listening to tune the core bass and L/R "house curve" EQ as that sets the tone for the whole system, then add the center/surrounds once that is accomplished. I let my ears tell me when I arrived, not the REW curves. But REW is an essential tool in the process. It helps me identify problem areas and define PEQ filters to address them.

I applied what I learned in my previous theater, and that acoustic plan was based on things I learned from Toole's book, Erskine's writings and builds, AVS Forum builds, and other observations and experiences in sound rooms over the years. Then I shoot from the hip.

I do not know if it is the larger room, the stiffer walls, or the differences in the acoustic materials used this time, but after tuning this room to replicate my previous one as much as possible, using mostly the same gear, this room sounds incrementally better to me. Just glad my hearing survived the construction process!
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Current: Deadwood II Theater
Previous: Deadwood Atmos theater [HTOM]
SSP-800 PLIIx 7.4; Anthem AVM 60 7.4.4, MiniDSP OpenDRC-AN
Aerial Acoustics 7B/CC3B fronts, KEF Ci200QS surrounds, Tannoy Di6 DC heights, Hsu ULS-15 subs
JVC RS520; Stewart Cima Neve 115"W x 49"H 2.35 screen

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