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post #1 of 23 Old 12-05-2019, 02:49 PM - Thread Starter
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2 or 4 Atmos channels

My theater room is about 20'x14', with 8' ceilings. Main listing position is 13' back from the screen. Would I noticeably benefit from 4 atmos channels vs just 2? Or is my room not large enough to really utilize that?

Home Theater: Marantz SR6012, Fronts: Paradigm Titans, Sides: Paradigm Atoms, Surrounds: Paradigm ADP-170, Sub: RBH I-12
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post #2 of 23 Old 12-05-2019, 02:59 PM
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Originally Posted by BlueWRXPride View Post
My theater room is about 20'x14', with 8' ceilings. Main listing position is 13' back from the screen. Would I noticeably benefit from 4 atmos channels vs just 2? Or is my room not large enough to really utilize that?

Your room would definitely work with a .4 atmos configuration, and it is highly recommended to go with this type of setup if you have the system to support it.
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post #3 of 23 Old 12-05-2019, 03:02 PM
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If you have one row of seats, 4. If you have two rows of seats, then go with 6.

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post #4 of 23 Old 12-05-2019, 03:22 PM - Thread Starter
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I do have a second row, but it's pretty much up against the back wall, probably just 3 feet off or so. I think 6 will be overkill for me. My receiver can process 11 channels and can power 9, so I'd have to get a separate amp.

Home Theater: Marantz SR6012, Fronts: Paradigm Titans, Sides: Paradigm Atoms, Surrounds: Paradigm ADP-170, Sub: RBH I-12
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post #5 of 23 Old 12-05-2019, 03:26 PM
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Originally Posted by BlueWRXPride View Post
Would I noticeably benefit from 4 atmos channels vs just 2?
2 height speakers will let you hear left-vs-right movement overhead. 4 height speakers will let you hear left-vs-right AND front-vs-back movement overhead. There's no way you won't notice that difference.

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post #6 of 23 Old 12-05-2019, 03:47 PM
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Originally Posted by BlueWRXPride View Post
My theater room is about 20'x14', with 8' ceilings. Main listing position is 13' back from the screen. Would I noticeably benefit from 4 atmos channels vs just 2? Or is my room not large enough to really utilize that?
Do 4. Much better Atmos experience

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post #7 of 23 Old 12-05-2019, 07:36 PM - Thread Starter
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So if I do that, assuming my head is around 3' above the floor, so 5' beneath the ceiling, and I'm sitting at 13', I should position the front atmos around 8' from the screen, and the rear around 18', so nearly at the back wall? I know i'm going for 45 degree angles to the MLP, right?

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post #8 of 23 Old 12-05-2019, 07:41 PM
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Originally Posted by BlueWRXPride View Post
So if I do that, assuming my head is around 3' above the floor, so 5' beneath the ceiling, and I'm sitting at 13', I should position the front atmos around 8' from the screen, and the rear around 18', so nearly at the back wall? I know i'm going for 45 degree angles to the MLP, right?
https://www.dolby.com/us/en/guide/sp...tup-guide.html

Obviously very difficult to get it perfect but this is the concept

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post #9 of 23 Old 12-05-2019, 07:44 PM - Thread Starter
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Yeah, that is what I was looking at to get the 45 degree target. But as you indicated, given my room that might not be realistic.

Home Theater: Marantz SR6012, Fronts: Paradigm Titans, Sides: Paradigm Atoms, Surrounds: Paradigm ADP-170, Sub: RBH I-12
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post #10 of 23 Old 12-05-2019, 07:53 PM
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Yeah, that is what I was looking at to get the 45 degree target. But as you indicated, given my room that might not be realistic.
Mine isn't perfect either but it still sounds pretty amazing one of the best upgrades to my theater

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post #11 of 23 Old 12-05-2019, 07:56 PM - Thread Starter
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What is the recommendation for how to power the 11 channels? My receiver can process 11, but only can power 9. Just add on a basic 2 channel amplifier and sent the L and R channels through it?

Home Theater: Marantz SR6012, Fronts: Paradigm Titans, Sides: Paradigm Atoms, Surrounds: Paradigm ADP-170, Sub: RBH I-12
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post #12 of 23 Old 12-05-2019, 08:17 PM
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Originally Posted by BlueWRXPride View Post
What is the recommendation for how to power the 11 channels? My receiver can process 11, but only can power 9. Just add on a basic 2 channel amplifier and sent the L and R channels through it?
Which receiver? Usually you want same power to LCR , so you want to make sure you can add a 2 channel amp and choose which speakers it powers. Maybe get a used 3 channel amp and use that to power your LCR.

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post #13 of 23 Old 12-06-2019, 08:49 AM
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Yeah, that is what I was looking at to get the 45 degree target. But as you indicated, given my room that might not be realistic.
Stick with 45 degrees elevation forward and rearward of the main listening position. The height speakers behind you will still be a couple feet from the back wall.

Are you planning on using in-ceiling speakers or attaching speakers using a ceiling mount/bracket?

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post #14 of 23 Old 12-06-2019, 08:57 AM
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Yeah, that is what I was looking at to get the 45 degree target. But as you indicated, given my room that might not be realistic.
SVS elevation speakers are very good with Atmos and allow for more flexible placement.

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post #15 of 23 Old 12-07-2019, 07:58 PM - Thread Starter
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Which receiver? Usually you want same power to LCR , so you want to make sure you can add a 2 channel amp and choose which speakers it powers. Maybe get a used 3 channel amp and use that to power your LCR.

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It's a Marantz SR6012. Yes, I was thinking that 3 channel amp for the LCR speakers would make the most sense.

Home Theater: Marantz SR6012, Fronts: Paradigm Titans, Sides: Paradigm Atoms, Surrounds: Paradigm ADP-170, Sub: RBH I-12
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post #16 of 23 Old 12-07-2019, 07:59 PM - Thread Starter
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Stick with 45 degrees elevation forward and rearward of the main listening position. The height speakers behind you will still be a couple feet from the back wall.

Are you planning on using in-ceiling speakers or attaching speakers using a ceiling mount/bracket?
In-ceiling for sure. Might go with the Micca R-8C

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post #17 of 23 Old 12-07-2019, 08:54 PM
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You can also use an old AVR with multi-channel inputs and run all 4 overheads from it. This is what I do and it works really well. allows you to adjust the level of the 4 speakers easily to suit individual movies or taste.


Also I have a 20x14x9 room and have just downgraded to 5.1.2 (from 7.1.7 which was recently upgraded from 7.1.4) and can confirm that more height speakers are better but 2 are still a huge improvement over none if you can't do or can't afford 4.


On a side note since you have the same size room and sitting almost the same distance I thought you might like to know that the stereo imaging and general sound improved when I moved my L & R into the room away from the corners. Still at 30deg but now approx 8" in from the side wall and 14" in from the front wall. But I only have small bookshelfs so YMMV.
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post #18 of 23 Old 12-08-2019, 11:04 AM - Thread Starter
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You can also use an old AVR with multi-channel inputs and run all 4 overheads from it. This is what I do and it works really well. allows you to adjust the level of the 4 speakers easily to suit individual movies or taste.


Also I have a 20x14x9 room and have just downgraded to 5.1.2 (from 7.1.7 which was recently upgraded from 7.1.4) and can confirm that more height speakers are better but 2 are still a huge improvement over none if you can't do or can't afford 4.


On a side note since you have the same size room and sitting almost the same distance I thought you might like to know that the stereo imaging and general sound improved when I moved my L & R into the room away from the corners. Still at 30deg but now approx 8" in from the side wall and 14" in from the front wall. But I only have small bookshelfs so YMMV.
Yeah, I could use a separate AVR, but I figure a used amplifier would be better. Partially just so it can auto turn on/off with the receiver and partially just for aesthetics.

Thanks for the input on your experience moving the LR away from the corners. I also have small bookshelves, Paradigm Titans, so maybe I'll give it a try!

Home Theater: Marantz SR6012, Fronts: Paradigm Titans, Sides: Paradigm Atoms, Surrounds: Paradigm ADP-170, Sub: RBH I-12
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post #19 of 23 Old 12-08-2019, 12:05 PM
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In-ceiling for sure.
Look for ones with angled baffles that allow you to aim the sound towards the listeners (rather than pointing to an arbitrary spot on the floor).

Sanjay
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post #20 of 23 Old 12-23-2019, 11:20 AM - Thread Starter
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I have a question on my 2 rear atmos speaker that I'm going to be installing. Based on what is currently in the joist cavities, it would be far easier to put the left rear atmos speaker one joist cavity further back than the right rear atmos speaker. If I wanted to put them in the same cavity, it would require me doing more invasive work to reroute some electrical lines that would otherwise be in the way. Would I be able to notice at all having one atmos speaker located 16" further back than the other?

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post #21 of 23 Old 12-23-2019, 11:32 AM
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Originally Posted by BlueWRXPride View Post
I have a question on my 2 rear atmos speaker that I'm going to be installing. Based on what is currently in the joist cavities, it would be far easier to put the left rear atmos speaker one joist cavity further back than the right rear atmos speaker. If I wanted to put them in the same cavity, it would require me doing more invasive work to reroute some electrical lines that would otherwise be in the way. Would I be able to notice at all having one atmos speaker located 16" further back than the other?
Based upon the way soundwaves move and arrive at the listeners ear there would be a noticeable difference with speakers located at different distances. Room calibration software along with a good microphone could mitigate the difference. I would still think it best to install them at the same distance. Could you simply move the right one back to match the left?

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post #22 of 23 Old 12-23-2019, 11:40 AM - Thread Starter
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One is obstructed in the front cavity, the other is obstructed in the rear. It's just one electrical wire, but I'd have to trace it back to the circuit breaker and pull it out of there so I can not cut the wire in the middle...

Home Theater: Marantz SR6012, Fronts: Paradigm Titans, Sides: Paradigm Atoms, Surrounds: Paradigm ADP-170, Sub: RBH I-12
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post #23 of 23 Old 12-23-2019, 11:45 AM
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One is obstructed in the front cavity, the other is obstructed in the rear. It's just one electrical wire, but I'd have to trace it back to the circuit breaker and pull it out of there so I can not cut the wire in the middle...
Ah I see. Another solution might be to use on ceiling Atmos speakers such as these. You can order ceiling brackets when you buy them. Would allow for more optimal placement.

https://www.svsound.com/collections/...ion%20speakers

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Last edited by skylarlove1999; 12-23-2019 at 11:49 AM.
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