Atmos Speaker Placement?

D

Danzilla31

Audioholic Spartan
Thanks, ‘Zilla!
:)
@Bostonhoff , there are a few other vids that I’ve seen by this guy that are all really good. He’s very practical about what he’s doing and the advice is sound.

As always, there will always be some compromise required unless you have the space to do a dedicated custom install.
Just be smart about your choices and remember that less can actually be more. Shoehorning Speakers into places that are too tight just to use a hook up on your AVR is always a poor choice.
While separation by distance from a bed layer Speaker to an Atmos Speaker is good, what ‘Zilla said earlier is key: the angles are the separation that create a believable soundfield and “bubble.”
Lastly, I don’t have time to watch the posted vid to remind myself of the content, but a very key point from that installer is off axis degradation of SQ. Not just in the upper FR, but across the entire spectrum. Somewhere there is a vid if not this one where he demonstrates the effect of having a misaligned Speaker and it is dramatic. ;)
As always, do your best with the install and try to minimize the compromises where possible.
This is the video you where talking about @ryanosaur where he shows what happens when your off axis and how the sound can degrade. It shows the change in response with pink noise as he moves the mic at different degrees from the position of an in ceiling speaker

 
Skye ezer

Skye ezer

Audiophyte
So looking to install 4 Atmos speakers. I have decided to go with the Focal 300 ICA6. The current setup is 5.2 and wanting 5.2.4. I have Focal Aria 936 fronts, 900 center, 906 sides, and two SVS PB subs. Running Denon x3800h avr and Buckeye Purifi 3ch amp for front three.

Everything I have read or watched talks about "angles" being the make or break with Atmos. I decided to go with the ICA6 because the research I have done suggests that an angled speaker directed at the MLP provides the best atmos experience. I am 100% with in-ceiling speakers as this is not a dedicated theatre room.

Questions:
1. In the Dolby PDF top view, it shows the front L & R speakers placed at 22-30* from MLP. Obviously, that will bring them together or spread them based on room size. Do the atmos speakers need to also be within the same angle of the MLP when looking from the top? I know they are not in line per the picture as I have gotten that out of my research. Just trying to figure out if they need to be within the 22-30* angle from MLP.

2. In the Dolby PDF side view, it shows the front atmos at 30-55* with an optimum of 45* and the rear atmos 125-150* with an optimum of 135*. Does the 35* angle of the Focal ICA6 affect this placement?

3. Based on questions 1 & 2, assuming the front Atmos follows the same degree requirements as the front speakers, I would then be rotating or toeing in the front Atmos speakers to point at the MLP. Would this then bring the speakers closer to the MLP since turning them in would change the side angle?

I appreciate any and all input as I work through this. I only want to put holes in my ceiling once:) Every picture or diagram I look at is two-dimensional. To me, this is a three-dimensional problem and then the issue with the speaker being angled confuses me even more.

I know there is a ton of information out there to include this site and unfortunately, that is also part of the problem.
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Thanks again!!
I've only gathered that positioning the front Atmos speakers closer to the Main Listening Position (MLP) can help focus the sound and enhance the overall experience. However, keep the side angle in mind. If you move them too close, the speakers might be positioned too near the MLP, causing unwanted reflections.
 
Last edited:
William Lemmerhirt

William Lemmerhirt

Audioholic Overlord
The only thing I've gathered is that positioning the front Atmos speakers closer to the Main Listening Position (MLP) can help focus the sound and enhance the overall experience. However, keep the side angle in mind. If you move them too close, the speakers might be positioned too near the MLP, causing unwanted reflections.
Actually this is false.
 
William Lemmerhirt

William Lemmerhirt

Audioholic Overlord
Actually I’m gonna back pedal. I initially read it as you were talking about the mains(left and right front speakers). I read it again today while NOT multitasking, and basically agree.
I need a proofreader apparently.
Apologies.
 

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