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Another AVS Forum Home Theater of the Month for Acoustic Frontiers!

This is Acoustic Frontiers’ 2nd AVS Forum Home Theater of the Month. Our first was Mr. Beck’s The Savoy.

The AVS write up can be found here: HT of the month – the Hodor theater.

Client Profile

Mr. Childs is a home theater enthusiast from Olathe, KS and active member of AVS Forum.

Project Overview

Mr. Childs came to Acoustic Frontiers for assistance with the layout and acoustic treatment of his dedicated home theater in a 22’8″ x 15’0″ space in the basement of his home.

Like many basement theaters the space was constrained by a 7’7″ ceiling height, which required us to carefully consider potential localization from ceiling mounted Dolby Atmos speakers.

Acoustic Frontiers Solutions

We provided the following services on this project:

  • Home Theater Layout
  • Low Frequency Optimization
  • Electrical Design
  • Acoustic Treatment Design
  • Video Calibration

The layout work took account of Mr. Child’s pre-existing equipment, which included JTR Noesis 228, Klipsch Pro-Cinema KPT-8000M surrounds and passive JTR Captivator Pro subwoofers.  Acoustic Frontiers provided additional equipment required to complete the theater, including screen, acoustic treatment and video processor.

home theater layout

 

The Acoustic Treatment Design specified a balance of absorptive and diffusive treatments, including Kinetics Versatune, RPG BAD, AcousticsFirst QuadraPyramid, Primacoustic Paintables as well as a deep low density fiberglass bass trap behind the screen wall.

Home theater acoustic treatment

Home theater bass trap
Partially finished screen wall bass trap

Electrical Design involved analyzing the theater’s power requirements and developing a wiring plan specifying number of circuits, wiring gauge, surge protection and battery backup.

For Video Calibration the client shipped his Panasonic PT-AE8000U projector to us. We provided a Lumagen Radiance 3D-XS and a comprehensive ISF video calibration, perfectly aligning greyscale and using the color cube calibration in the Lumagen to provide accurate colors.

Home theater projector pre-calibration greyscale
Pre-calibration greyscale

Home theater projector calibration post-greyscale
Post-calibration greyscale

The Results

Home Theater view towards screen Home Theater view towards seats

 

Comments from AVS Enthusiasts

The audio in that room stops on a dime. Very neutral without sounding clinical” AVS forum member Chirpie

“I recently brought my Samsung UHD player over there with some local enthusiasts so we could watch Deadpool in Dolby Atmos. It was fantastic! Just great sound coming out of those JTR mains and tight bass from the Captivators. The room is very cohesive regarding audio. I really enjoyed the Atmos and DTS.X demo material he ran for us. I did not detect timbre differences in the speakers when listening to movie clips. The room is set up and treated well. More than enough good amps coming from his AVR to drive the JTR well last reasonable listening levels and clean as a whistle! AVS forum member JediMasterGrant

2 thoughts on “Another AVS Forum Home Theater of the Month for Acoustic Frontiers!”

  1. Hi Nyal…great website! Thank you. On this particular design, I notice you placed the side surrounds midway between the rows. Additionally, the rear surrounds are at 158deg. Lastly, the subs are in the front corners of the room. Is there a particular reason why these locations appear to deviate from other recommendations on your site. For instance, in the “5.1 AND 7.1 RECOMMENDATIONS FROM DOLBY, THX AND ITU” article you mention “We prefer the front pair to be level or slightly in front of the main listening position and the rear pair to be at around 135 degrees” Furthermore, I think you mentioned somewhere that placing the subs in the corners would produce “boomy” bass. Was there environmental conditions not apparent on the drawing that caused this deviation? Thanks for any input you can provide and keep up the great work.
    Tom

    1. In this case the 2nd row was the main row, so the surrounds were in front of the seating position. The position of the rears was dictated by the door at back right corner. This particular design was done in the early Atmos days, so things are a bit different with our latest designs where we are laying out for 15 speakers.

      The corners is a good place for subwoofers and we often put them there…so I’m pretty sure you read the comments about not putting subs in corners elsewhere. Putting subs in the corners maximizes coupling to the room modes, which is a good thing for efficiency – as in getting the most SPL from your subs. You can then manage the frequency response through room correction. Most of our new designs have subs at the front and rear of the room, rather than just at the front. We’ve found that with subs just at the front there’s a tendency to get a hole in the bass, unless the seating position is really close to the back wall. With subs front and rear, that hole is eliminated.

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