Upgrading to 5.1.4 - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 9 Old 02-25-2016, 05:17 AM - Thread Starter
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Question Upgrading to Atmos/DTS:X 5.1.4

I was not sure where to post this thread, however, if the Admin thinks it’s in an inappropriate section, I appreciate to move it to the right section.

OK. I spent quite some time sketching the plans of the physical speakers placement for Atmos and DTS:X setup. Since there are no guidelines for DTS:X speakers placement, I followed the Dolby Atmos guidelines to their best.

Well, I am good dealing with drawings but not with writing, . Here, I used Google SketchUp to make the sketches, I made Top View and Side View for each angle dimensions provided by Dolby.

Quick notes:
  • My current setup is 5.1 and might be upgraded to 7.1 in the future
  • The “Recommended Setup” is for a 5.1.4 or (7.1.4 in the future) with a single row seat
  • The FR & FL are placed @22° and SR & SL are placed @110°
  • The TFR & TRR speakers are in-line with the FR and TFL & TFR speakers are in-line with the FL.
  • The Room Dimensions 21.4’ (L) X 9.5’ (W) X 7.9’ (H)
  • MLP Height is 3.0’

TF @55° & TR @ 125°

Top View


Side View


TF @45° & TR @135°

Top View


Side View


TF @30° & TR @150° (The TRL is falling outside of the room boundary)

Top View


Side View


TF @30° & TM @65°, @80° & @100°

Top View


Side View


I need a professional advice and recommendation based on your experience. I tried to read as much as I can but I am still unable to decide.

My questions:
  1. Which setup from the above will be best for both Atmos & DTS:X?
  2. Which speaker type do you recommend, In-Ceiling or Height Speakers angled to MLP?
  3. For In-Ceiling speakers, my choice is Yamaha NS-IC800 and for Bookshelf is Jamo C91. Which one do you recommend based on the speaker type recommendation? I am not really sure about the dispersion angle of the Yamaha and how would that will effect the placement.

I am not sure whether these are all my questions, but if anything came to my mind I will post it here. If more info is needed, please let me know.

Your recommendations will be highly appreciated.
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Last edited by showmak; 02-25-2016 at 08:44 AM.
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post #2 of 9 Old 02-25-2016, 03:04 PM
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45 degrees front & back will work fine. I would consider moving the seating closer to get a wider soundstage, then adding a couple surrounds for a 7.1.4 layout.

Sanjay
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post #3 of 9 Old 02-25-2016, 03:14 PM - Thread Starter
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Upgrading to 5.1.4

@sdurani thank you Sanjay for your input. Do you mean moving the seating about 1 foot to the front?

My plan for 7.1.4 is to get Jamo C10 Surrounds and place them @90 deg of MLP and move the C103 to the back for rear surrounds, let say @150 deg.


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post #4 of 9 Old 02-25-2016, 03:40 PM
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Don't know if it's exactly one foot, but enough to get a wider soundstage (front L/R at 30 degrees from centre instead of 22). Doesn't have to be exact. But that will give you more side vs rear separation for when you do a 7.1 layout. As and when you do a 7.1 layout, consider putting your side speakers slightly forward of your listening position (80-85 degrees instead of 90) for better envelopment.

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post #5 of 9 Old 02-28-2016, 04:10 AM - Thread Starter
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Hi @Sanjay

I think I don't have a choice to move the fronts wider as I am limited with the width of the front wall, 9.5'. To achieve a 30° separation for the fronts, I need to push the MLP to the front by 2.0' therefore I will be too close to the TV, 6.5'. I am currently OK with the fronts and I really enjoy when listening to musics on 2.1, I really get a good sound staging with the current placement.

As you suggested the 45° front and back I believe is a good decision bearing in mind the dispersion capability of the speakers, which I am not sure about it, and from which I read that it will impact the Atmos effects.

However, my main concern is the in-ceiling speakers vs height speakers positions options. As you can see from the attached,

Option No. 1, in case of in-ceiling setup, the speakers will be placed inside the deeper ceiling, do you think the sound will be disrupted with the walls of the dropped ceiling, the depth of the deeper ceiling is about 4"?

Option No. 2, how about the idea of placing the Height Speakers on Wall angled to MLP? Will I get the Atmos near real effects? With this option, I will save my ceiling from 4 big holes, in addition, I can move the speakers freely, and I can get the same brand of the other speakers.

What do you suggest?
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post #6 of 9 Old 02-28-2016, 07:09 AM
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Given the two choices, I would do height speakers in/on the deeper ceiling. Whichever you end up doing, it's a good idea to angle speakers towards the MLP. If you decide to do in-ceiling speakers, then get the kind with aim-able drivers.

Sanjay
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post #7 of 9 Old 02-29-2016, 10:34 PM - Thread Starter
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Upgrading to 5.1.4

Quote:
Originally Posted by sdurani View Post
Given the two choices, I would do height speakers in/on the deeper ceiling. Whichever you end up doing, it's a good idea to angle speakers towards the MLP. If you decide to do in-ceiling speakers, then get the kind with aim-able drivers.

About the in-ceiling speakers, do you mean aim-able woofer or tweeter? Because the Yamaha's are tweeter aim-able.


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post #8 of 9 Old 02-29-2016, 10:44 PM
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IF you are doing in-ceiling, then see if you can find ones where the whole speaker is angled towards the listening area. If not, then ones with aim-able tweeters would be the next best choice.

Sanjay
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post #9 of 9 Old 03-01-2016, 09:06 AM
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RSL makes a great, affordable in-ceiling where the whole driver is aimed generally for Atmos application. I would have picked them up if I hadn't already ordered Aperion In-ceilings(with only an aimable tweeter).
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