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AustinJerry's Set-Up

post #1 of 21
Thread Starter 

The purpose of this thread is to document my listening room, equipment, and the listening room's audio performance.  It is not intended for feedback, although if you have any questions, I will be happy to answer them.

 

Listening Room Layout and Pictures

 

 

 

 

 

 

 

 

 

 

 

 

 

Room Treatments:

 

2'x4' Bass Traps (18 total, 4 RealTraps Mini-Traps, 12 GIK 244 Bass Traps, 2 GIK Monster Bass Traps)

2'x4' Full-Spectrum wall panels (5 total, GIK 242 Panels)


Edited by AustinJerry - 4/1/14 at 10:59am
post #2 of 21
Thread Starter 

Equipment List

 

Speakers (11.1 configuration):

 

 

 

Denon AVR-4520CI

Emotiva XPA-3 (Left/Right/Center)

Oppo BDP-93

DirecTV HR-24 (2)

AppleTV 3

Sonos ZP90

Sony XBR65-X900a 4K Flat Panel

Sony FMP-X1 4K Media Player

Darbee Vision Darblet

APC H-15

Audyssey Pro Kit

 

How I spent my AV budget:

 

 

Note:  My philosophy is that 50% of the AV budget should be spent on speakers.


Edited by AustinJerry - 1/15/14 at 2:47pm
post #3 of 21
Thread Starter 

Room Response Characteristics (updated March 9, 2014)

 

Measured using REW 5.01 beta 17, UMIK-1 USB mic.  Noise floor measured using RTA is 50dB.

 

Frequency response:

 

 

 

 

 

Modal ringing:

 

 

 

 

 

 

 

 

Impulse Response:

 

 

 

 


Edited by AustinJerry - 3/9/14 at 8:44pm
post #4 of 21
Thread Starter 

Analysis - Benefits of Multiple Subwoofers

 

The purpose of this post is to show the interaction of multiple subs in the listening environment, and how careful placement and tuning can result in a significant improvement in bass response.  The subs used in this analysis are four Hsu Research ULS-15 sealed subs.  The subs are placed in the listening room as per the diagram in the first post in this thread.  The two front subs are at the 1/4 and 3/4 spots along the front wall, and the two rear subs are collocated at approximately the center of the back wall.  The two front subs are equidistant from the MLP, and are connected to the sub1 input on a MultEQ XT32 AVR with Sub EQ HT.  The two rear subs are also approximately equidistant from the MLP, on the Sub2 input on the AVR.  The two front subs are gain-matched to each other, and the two rear subs are gain-matched to each other.  However, the level of the rear subs is 5dB lower than the two front subs, because they are significantly closer to the MLP.

 

The measurement of the subs independent of each other, and as front and rear pairs, reveals that the in-room response (without room correction) is not very smooth.

 

Individual subs:

 

 

 

 

 

Sub Pairs:

 

 

 

However, when all fours subs are driven at the same time, we start to see advantages in the summed response:

 

 

And Audyssey room correction puts the final smoothing on the response:

 

 

And finally, combined response including center channel:

 

 

This analysis clearly shows the benefits of multiple subs in the listening environment.


Edited by AustinJerry - 3/11/14 at 8:18am
post #5 of 21
Thread Starter 

<Reserved>

post #6 of 21
Thread Starter 

<Reserved>

post #7 of 21

Nice work, Jerry. It's useful to have all this stuff in one place.

post #8 of 21
That has to sound incredible.
post #9 of 21
Hi Jerry,

Just curious, why do you have the L/R at +/- 45 degrees? That's pretty wide (usually 30 is plenty). Considering you also have wide speakers (at +/- 65) it does not seem you'd be lacking for width cues.
post #10 of 21
Thread Starter 
Quote:
Originally Posted by Roger Dressler View Post

Hi Jerry,

Just curious, why do you have the L/R at +/- 45 degrees? That's pretty wide (usually 30 is plenty). Considering you also have wide speakers (at +/- 65) it does not seem you'd be lacking for width cues.

 

Roger,

 

 

Perhaps you are miss-interpreting my drawing.

 

 

The front speakers are at an angle of 27.3 degrees, and the Wides are at an angle of 51.2 degrees, which is actually a narrower angle than the recommendation.

post #11 of 21
Quote:
Originally Posted by AustinJerry View Post

Roger,

Perhaps you are miss-interpreting my drawing.
Oops, yes, I did not notice the angles! I just plopped it into Corel and measured them. The drawing is, as they say, "not to scale." wink.gif

Sorry for my confusion.
post #12 of 21
Thread Starter 

No harm done.  It is just a PowerPoint drawing, so no way to draw it to scale.  I used to use AutoCAD when I was working, but don't want to spend the money for a personal license.  If you know of a good consumer-class (read:  inexpensive or free) CAD program, I would welcome the recommendation.  In the meantime, I determine angles by using a spreadsheet that calculates the angles from the distances of the legs of the triangle.

post #13 of 21
Quote:
Originally Posted by AustinJerry View Post

No harm done.  It is just a PowerPoint drawing, so no way to draw it to scale.  I used to use AutoCAD when I was working, but don't want to spend the money for a personal license.  If you know of a good consumer-class (read:  inexpensive or free) CAD program, I would welcome the recommendation.  In the meantime, I determine angles by using a spreadsheet that calculates the angles from the distances of the legs of the triangle.
If you like to have the option for 3D rendering, try SweetHome3D. I found it much easier than Sketchup.

attachment.php?attachmentid=167670&amp;d=1266632936
post #14 of 21
Here's your room translated to SweetHome3D



The project's file: Jerrys Room.zip 144k .zip file
post #15 of 21
Thread Starter 

Wow, I am impressed.  I need to download that software.  Thanks!

post #16 of 21

That is great. I am building mine now in Sweet Home it rocks!

post #17 of 21
Quote:
Originally Posted by Roger Dressler View Post

Here's your room translated to SweetHome3D



The project's file: Jerrys Room.zip 144k .zip file

Quote:
Originally Posted by AustinJerry View Post

Wow, I am impressed.  I need to download that software.  Thanks!

I am IMPRESSED as well!!! Sweet, indeed!
post #18 of 21
Thread Starter 
Yes, I still owe it to Roger to learn how to use that software. So many things on the to-do list!
post #19 of 21

I have finished my drawings. Even put my wife in one. Take a look. 

 

I have posted the source files as well.

 

http://files.snowsoftware.com/files.zip 

 

 

 

 

 

 

post #20 of 21
Great Looking (& sounding ) room, came here from the link in your sig & your suggestion in the REW thread about a month ago - trying to get caught up as we speak so I may join the discussion.. just started measuring a few weeks ago after a lot of lurking & learning..
post #21 of 21
Very good set-up ! I like it.
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