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Discussion Starter · #1 · (Edited)
Quite a few years ago I purchased a two acre lot on a hill about 15 miles northwest of Omaha, Nebraska. On June 1, 2018, I broke ground on my new house and theater. It is a post and beam house from Sand Creek Post & Beam in Wayne, Nebraska. I'm calling the house Big Elk Lodge. Big Elk was a chief of the Omaha Indian tribe in the early 1800's.

The house is built from Ponderosa Pine from the Black Hills of South Dakota. I will also be using some rough cut Ponderosa Pine in the theater so I decided to call it Ponderosa Theater.

Dimensions (before walls)
28' 11" long, 18' 9" wide, 10' 10" high.

Video System
JVC DLA-NX7 or NX9
Lumagen Radiance Pro
Panamorph Paladan DCR
Seymour Screen Excellence 2.40 Enlightor-Neo Acoustically Transparent, 150" wide x 62" high

Audio System
Isolation Transformer- Torus Power RM100 Balanced
Source - HTPC with JRiver Media Center
Processor - Storm Audio ISP 3D.20 Elite with Dirac Live 2.0

Speakers
Left, Center, Right Speakers: (3 ea) JTR Speakers Noesis 215RM
Rear Surrounds: (2 ea) JTR Speakers Noesis 215RM
Side Surrounds: (4 ea) JTR Speakers Single 8HT
Front Height/Top Front: (3 ea) JTR Speakers Pro 8
Surround Height/Top Rear: (2 ea) JTR Speakers Pro 8
VOG/Top Middle: (2 ea) JTR Speakers Single 8HT-LP
Subwoofers
(2 ea) JTR Speakers Captivator S2 (front of room)
Infinite Baffle subwoofer system, 2 manifolds, 4 ea Acoustic Elegance IB15 woofers/manifold (rear of room in riser)

Amplifiers
Base Layer
3 ea - Digital Amp Company MEGAschino Monoblocks with 1500 watt transformers
1 ea - Digital Amp Company MEGAschino Stereo amp with 1800 watt transformer
1 ea - Digital Amp Company MEGAschino Stereo amp with 1500 watt transformer
2 ea - Digital Amp Company Maraschino mono amps, 60V power supply

Height/Top Layer
7 ea - Digital Amp Company Maraschino mono amps, 60V power supply

Bass testing options
  • 5.1 Fullrange system with subs for LFE
  • LFE routed just to front subwoofers
  • LFE routed to front subwoofers and rear IB system
  • LFE routed just to rear IB system
  • LFE routed to front subwoofers and all 5 Noesis 215RM speakers
  • LFE routed to front subwoofers, IB system, and all 5 Noesis 215RM speakers
  • LFE routed just to 215RM speakers
  • Redirected bass routed to front subwoofers
  • Redirected bass routed to front subwoofers and rear IB system
  • Redirected bass routed just to rear IB system
  • Redirected bass routed to front subwoofers, IB system, and all 5 Noesis 215RM speakers
  • Redirected bass routed to closest Noesis 215RM speaker
  • Double bass array for music (rear 215RM speakers out of phase and with delay)
  • Single bass array for movies (24"+ of absorption at rear of room)
  • Nearfield bass testing using IB system
  • Tactile testing with a 30 Hz low pass on IB system in riser

Seating
Front Row - TBD
Second Row - (5) Irwin #71 Signature rocker seats, 44" backs, with Cabernet vinyl
Third Row - (5) Irwin #71 Signature rocker seats, 44" backs, with Cabernet vinyl
- Irwin seats have arms and cupholders and are very similar to those at The Alamo Drafthouse in Omaha, NE

HVAC
Separately zoned geothermal heat pump with 4 supplies

Front of the house


South elevation


View to the south


Footings for theater two feet deeper than the rest of the basement


Foundation for the theater - dirt was dug out later


Basement poured, walk out basement wall finished, TJI joists and decking installed (note: heavy rains of 7"+ filled the theater with water before the rest of the basement floor was poured)


Post & Beam frame starting to be erected (7/30/2018)
 

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Awesome Michael! I look forward to watching it all come together. :cool:

What was your reasoning behind using full range for your rear surrounds and not just match the rest of the surrounds?
Was it to give you more options for all of your bass routing option experiments?
 

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Subscribed. I look forward to fallowing your build to the end. You will more then likely beat me done and have and AWESOME theater in the end.
 

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Discussion Starter · #10 ·
Awesome Michael! I look forward to watching it all come together. :cool:

What was your reasoning behind using full range for your rear surrounds and not just match the rest of the surrounds?
Was it to give you more options for all of your bass routing option experiments?
Because of how I'm designing my rear wall, I have room for the 215RM's without them intruding into the room. I wanted the 60 degree horn for coverage of the seating area without too much dispersion. It should be a little easier to provide even sound at all three rows than with the JTR Single 8. I can also have a two channel system from the other end of the room and use the IB subs as separate left/right subwoofers for the "mains".

Yes, I did want more options for bass routing experiments. The 215RM 15" woofers have ~26% more excursion than the 15" woofers in the Submersive. The cabinet in the 215RM's is also larger than the Submersive for greater efficiency at low frequencies. One can think of the 215RMs as 5 identical sealed "subwoofers" that I have in the room. I can also add a Linkwitz Transform in JRiver Media Center to each 215RM. I'm very interested in trying out a double bass array and this setup gives me the means to try that.
 

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Do you have a plan of you layout that you could post? Looks like you may be coming to the theater from the side back a the rear row?
 

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Discussion Starter · #12 ·
I'm the general contractor for the project and this is my first house. I designed my house within certain parameters or pre-existing conditions that are used by Sand Creek Post and Beam and then made changes. They usually use wood beams to support the TJI joists. After discussing with my framer I decided to change to the a steel beam and extend the first post to 24' ft (see picture below). This allowed for the beam to completely span the theater. I could have made a load bearing wall for the theater and no beam, but my joists would have ran horizontally in the theater. This wouldn't have worked as well for HVAC. Sand Creek also preferred the house engineered with the steel beam under the entire house.

In hindsight, I would have had the TJI joists evenly centered in the room by narrowing the space between the first two joists. Since I was using 11' walls, I had to increase the rebar from #4 to #5 for the entire basement per my engineer. Fortunately, I could still use 8" walls instead of 10" walls.

The theater was poured 26" deeper for several reasons:
  1. I left 2" for flooring (rigid foam/OSB)
  2. I can possibly incorporate the first row of seating into the riser (tactile effect from IB subwoofer system for all 3 rows)
  3. I can have two riser levels for seating and can walk in to the theater at the riser height
  4. The poured concrete pad is decoupled from the rest of the basement
  5. The extra room height allows for better placement of 3D audio speakers
  6. The extra room height allows for more acoustic treatment on the ceiling

The extra concrete vertical "beams" that you see are extra supports for the fireplace in the living room above the theater. These carry the weight down to a large footing underneath the theater floor. I have a "walk out" side and a completely under grade side to the theater. Ideally, I would have had the "walk out" side at the rear of the theater to reflect less bass back into the theater (a more lossy system). However, due to where I wanted my steps I decided to have the "walk out" side as the front of the theater.

 

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Discussion Starter · #13 ·
Do you have a plan of you layout that you could post? Looks like you may be coming to the theater from the side back a the rear row?
Here is an initial layout:



 

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Because of how I'm designing my rear wall, I have room for the 215RM's without them intruding into the room. I wanted the 60 degree horn for coverage of the seating area without too much dispersion. It should be a little easier to provide even sound at all three rows than with the JTR Single 8. I can also have a two channel system from the other end of the room and use the IB subs as separate left/right subwoofers for the "mains".

Yes, I did want more options for bass routing experiments. The 215RM 15" woofers have ~26% more excursion than the 15" woofers in the Submersive. The cabinet in the 215RM's is also larger than the Submersive for greater efficiency at low frequencies. One can think of the 215RMs as 5 identical sealed "subwoofers" that I have in the room. I can also add a Linkwitz Transform in JRiver Media Center to each 215RM. I'm very interested in trying out a double bass array and this setup gives me the means to try that.
Love it - all good reasons to do it that way, especially the part about the ability to try out double bass array. I have never actually heard a 215 RM, I didn't realize they had more output than a Submersive.
 

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This is gonna be cool. I’m looking forward to seeing your progress. I watch a YouTube channel called pure living for life where a couple is building a timber frame house with SIPs. Both are unknown building methods to me so it’s interesting to watch. I bet that fireplace with those big windows flanking it will be an awesome feature upstairs. And down below will be even better.
 

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Looks like a great space and well thought out plan!
 
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