Atmos speaker placement - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 20 Old 04-10-2019, 10:38 AM - Thread Starter
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Atmos speaker placement

Have a smallish room I'm setting up Atmos in, roughly 14 L x 10 W. Due to layout, couch is pretty much up against back wall. I'm going 5.1.2 setup and using in ceiling speakers. Receiver is a Denon S930H. Back speaker will be placed to the side and slightly behind seating area. Where would be the ideal place to place ceiling speakers in relation to seating position ?
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post #2 of 20 Old 04-10-2019, 11:08 AM
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Originally Posted by reaper7534 View Post
Have a smallish room I'm setting up Atmos in, roughly 14 L x 10 W. Due to layout, couch is pretty much up against back wall. I'm going 5.1.2 setup and using in ceiling speakers. Receiver is a Denon S930H. Back speaker will be placed to the side and slightly behind seating area. Where would be the ideal place to place ceiling speakers in relation to seating position ?
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post #3 of 20 Old 04-10-2019, 11:26 AM - Thread Starter
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1800 pages, I'll get right on that.

Thanks
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post #4 of 20 Old 04-10-2019, 11:55 AM
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Originally Posted by reaper7534 View Post
1800 pages, I'll get right on that.

Thanks
Just follow this as close as you can.

https://www.dolby.com/us/en/guide/speaker-setup-guides/5.1.2-overhead-speaker-setup-guide.html
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post #5 of 20 Old 04-10-2019, 12:15 PM
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Originally Posted by reaper7534 View Post
Have a smallish room I'm setting up Atmos in, roughly 14 L x 10 W. Due to layout, couch is pretty much up against back wall. I'm going 5.1.2 setup and using in ceiling speakers. Receiver is a Denon S930H. Back speaker will be placed to the side and slightly behind seating area. Where would be the ideal place to place ceiling speakers in relation to seating position ?

Without seeing a diagram of the room set up, I am just imagining how it might be. Going by what you have described, I would place the in-ceiling speakers about a foot or two forward of the listeners head position, with the tweeter pointed towards the MLP. This would provide a good dispersion of sound. Align the in-ceiling speakers in line with the front L & R speakers.
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post #6 of 20 Old 04-10-2019, 12:30 PM - Thread Starter
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Originally Posted by arbiadya View Post
Without seeing a diagram of the room set up, I am just imagining how it might be. Going by what you have described, I would place the in-ceiling speakers about a foot or two forward of the listeners head position, with the tweeter pointed towards the MLP. This would provide a good dispersion of sound. Align the in-ceiling speakers in line with the front L & R speakers.
Thank you. That is what Dolby basically recommended, but I wanted people with real world experiences. I had originally wanted to do upfiring, but have angled ceilings so that is a no go.
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post #7 of 20 Old 04-10-2019, 12:48 PM
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I have a similar situation with my space. The space is 17 x 12 with a 8ft ceiling and I'm running 5.1.2 today with the Atmos speakers overhead in-ceiling. I followed Dolby's guidance the best I could given space limitations and the basement already being finished. MLP is approximately 12' 6" from the display. So, in my space I have my L/R spaced 7' 9" which falls with in Dolby's recommended 0.5 to 0.7 of the width of the overall layout. Given that, my Atmos speakers are also space 7' 9" apart. I used Dolby's recommendation of between 30 and 55 degrees from MLP to place the speakers roughly 2 feet in front of the MLP. This should be around 35 degrees. The in-ceiling speakers do have a pivoting tweeter to allow for aiming at MLP.

My space is far from ideal, but I feel I've done the best I can with what I have. There are probably some adjustments that can/should be made in terms of spacing and distance from MLP, but overall it sounds damn good to me.

*Note that I linked Dolby's installation guide and not the generic page that doesn't provide height or distance recommendations.
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post #8 of 20 Old 04-10-2019, 01:49 PM
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...I used Dolby's recommendation of between 30 and 55 degrees from MLP to place the speakers roughly 2 feet in front of the MLP. This should be around 35 degrees. The in-ceiling speakers do have a pivoting tweeter to allow for aiming at MLP.
Just to clear this up, Dolby recommends 65-100 degrees for a X.X.2 ceiling speaker setup. Ear height when seated is about 3 feet on average, so with 8' ceilings there's 5' ear to ceiling. Speakers are 2' in front of MLP. Solving for right angles, that's ~68 degrees.


......

As a general statement, Dolby just doesn't make up these numbers out of thin air.

......

Last edited by Funkeye; 04-10-2019 at 02:04 PM.
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post #9 of 20 Old 04-10-2019, 01:51 PM
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Originally Posted by reaper7534 View Post
1800 pages, I'll get right on that.

Thanks
Your welcome.

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post #10 of 20 Old 04-10-2019, 01:53 PM
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Quote:
Originally Posted by Funkeye View Post
Just to clear this up, Dolby recommends 65-100 degrees for a X.X.2 ceiling speaker setup. Ear height when seated is about 3 feet on average, so with 8' ceilings there's 5' ear to ceiling. Speakers are 2' in front of MLP. Solving for right angles, that's ~68 degrees.

Dolby just doesn't make up these numbers out of thin air.
I don't recall suggesting that they were making up numbers, not sure why there is the implication that I did and their installation guide seems to say differently. Regardless, you are correct on the angles. My math is wrong based on ear height of listener position. Good thing speakers can be moved eh?

"The overhead speakers should be at a height (shown as H3 in Figure 2) between two and
three times the vertical position of the listener-level speakers. The angle of elevation from
the listening position to the left top front/right top front and left top rear/right top rear
overhead speakers in a 7.1.4 reference layout should be 45 degrees. This may be adjusted
between 30 and 55 degrees if needed, as shown in Figure 2. "

https://www.dolby.com/us/en/technolo...guidelines.pdf

Last edited by usernameunknown; 04-10-2019 at 01:57 PM.
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post #11 of 20 Old 04-10-2019, 01:58 PM
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Originally Posted by usernameunknown View Post
I don't recall suggesting that they were making up numbers, not sure why there is the implication that I did and their installation guide seems to say differently. [/url]
It wasn't directed towards you, it was just a general statement. My formatting wasn't very good. Fixed it I think. Sorry for the confusion.

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Originally Posted by usernameunknown View Post
"The overhead speakers should be at a height (shown as H3 in Figure 2) between two and
three times the vertical position of the listener-level speakers. The angle of elevation from
the listening position to the left top front/right top front and left top rear/right top rear
overhead speakers in a 7.1.4 reference layout should be 45 degrees. This may be adjusted
between 30 and 55 degrees if needed, as shown in Figure 2. "
https://www.dolby.com/us/en/technolo...guidelines.pdf
Yes for a X.X.4 system it's 30-55 degrees either way.
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Last edited by Funkeye; 04-10-2019 at 02:06 PM.
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post #12 of 20 Old 04-10-2019, 02:12 PM
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Quote:
Originally Posted by Funkeye View Post
It wasn't directed towards you, it was just a general statement. My formatting wasn't very good. Fixed it I think. Sorry for the confusion.



Yes for a X.X.4 system it's 30-55 degrees either way.
Yup, you're right. Thank you for that. Reviewing the diagram on page 27 I see the 65 - 100 degrees.
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post #13 of 20 Old 04-11-2019, 06:07 AM - Thread Starter
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I've done my best to diagram the layout and obviously not to scale, but measurements are correct. The TV is mounted to the wall and has a console beneath it which will have speakers on it. Right now just some cheap Yamaha HTIB speakers which will be upgraded to Klipsch bookshelf speakers for LR and and center. The area opposite the glass sliding door is open to the kitchen and the ceiling angles with the length of the couch. Obviously none of this is ideal for Atmos, but I have to work with what I have. Should I still go about 2 ft forward of MLP and use in-ceiling speakers with a aimable tweeter ? I can't use bracket mounted speakers since it will be way too low on the low side of the ceiling. Rear surround will me mounted on stands.
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post #14 of 20 Old 04-11-2019, 01:24 PM - Thread Starter
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Originally Posted by reaper7534 View Post
I've done my best to diagram the layout and obviously not to scale, but measurements are correct. The TV is mounted to the wall and has a console beneath it which will have speakers on it. Right now just some cheap Yamaha HTIB speakers which will be upgraded to Klipsch bookshelf speakers for LR and and center. The area opposite the glass sliding door is open to the kitchen and the ceiling angles with the length of the couch. Obviously none of this is ideal for Atmos, but I have to work with what I have. Should I still go about 2 ft forward of MLP and use in-ceiling speakers with a aimable tweeter ? I can't use bracket mounted speakers since it will be way too low on the low side of the ceiling. Rear surround will me mounted on stands.
Expected more responses with my awesome drafting skills

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post #15 of 20 Old 04-11-2019, 02:21 PM
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The diagram is helpful. How far apart are your front L/R? Are you planning to keeping the in-ceiling speakers inline with those or go wider? The reason I ask is that since you have the slope to contend with so I"m wondering what the height is between the average MLP ear height (36") and the two speaker locations on the ceiling. Obviously one will be slightly higher than the other, but knowing these values will allow you to place them in a better location in respect to the MLP.

Based on Dolby's guidance (as clarified by Funkeye) you've got 65 - 100 degrees to play with. So, assuming your mount points are 6 and 6.5ft above MLP ear height and 2ft forward of MLP, you're at 71.5 & 72.8 degrees respectively. Which is within 'spec' so to speak.
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post #16 of 20 Old 04-11-2019, 02:37 PM
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Here's what I would do for the .2

OVL (over-head left): inline (horizontal with your RL rear-left, align with the G(lass sliding door)
OVR (over-head right): inline (horizontal with your RR rear-right, alight with LO(ve seat)
I would aim the speakers to MLP.


I have 5.1.2 system but instead of placing overhead, I had the .2 on the front wall, 9'-10' north, inline with FL/FR.
NOT impressed with Atmos and/or DTS:X
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post #17 of 20 Old 04-14-2019, 09:56 AM - Thread Starter
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My measurement were a little off on ceiling height, 10 feet on high side, 8'6" on low. Other measurement are 10 feet in between rear surrounds. Front and rear left speakers are in line, front left and right are about 7 feet apart. Listening position is more on left side to be centered with TV.
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post #18 of 20 Old 04-14-2019, 05:53 PM - Thread Starter
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Correction, the right side speakers are in line. I purchased the 8" miccas tonight. Leaning towards Polk tsi200 for front, tsi100 for rear and cs10 for center. Still undecided on sub. Still using htib speakers atm.
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post #19 of 20 Old 04-14-2019, 07:14 PM
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If you want my advice, I would move that couch forward a foot or two, then place the atmos behind your seating position as close to the wall as possible (ideally they should be in line with your fronts, so perhaps you can move those out wider). Then when you have the money, upgrade your AVR to a 9 channel and add 2 more atmos speakers in the front. This will give you the best experience. Here's how I set mine up. It may not be the same, but it can perhaps give you some ideas.
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post #20 of 20 Old 04-14-2019, 07:18 PM
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Quote:
Originally Posted by reaper7534 View Post
Correction, the right side speakers are in line. I purchased the 8" miccas tonight. Leaning towards Polk tsi200 for front, tsi100 for rear and cs10 for center. Still undecided on sub. Still using htib speakers atm.

Instead of the CS10, you may instead want to look into the Polk LSiM 704c.
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