Need help with Atmos placement in my little 7.1.4 setup. - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 1Likes
  • 1 Post By HurricaneDitka
 
Thread Tools
post #1 of 15 Old 12-11-2019, 11:22 AM - Thread Starter
Member
 
HurricaneDitka's Avatar
 
Join Date: Dec 2018
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked: 25
Need help with Atmos placement in my little 7.1.4 setup.

I'm finally moved in to my new house and beginning work on my little theater with probably way too many speakers. I am going to do a 7.1.4 setup. I was thinking of using DIYSG Volt 6s for all 4 Atmos channels. I was going to use the Atmos flat pack and recess them into the ceiling for the rear height speakers and was going to use the angled flat pack for the front height speakers. The room is quite small at 12.5' x 15'.

I have a few questions...
1. With the front height speakers on the front wall, where would be the best location for the rear ones?
2. Is it ok to have the front ones on the wall and rear ones on the ceiling, or would it be best to put all 4 of them in the ceiling?

Here are some diagrams:
Full size: https://i.imgur.com/4Ph56Jv.jpg
Full size: https://i.imgur.com/lAw9Mz9.jpg
Full size: https://i.imgur.com/0SR3FL0.jpg

Speaker List:
Mains: Klipsch KSP-400s
Center: Klipsch KSP-C6
Surround L&R: DIYSG Cobalt 8
Surround Back L&R: DIYSG Cobalt 8
Atmos Front Height: DIYSG Volt 6
Atmos Rear Height: DIYSG Volt 6
Subs: Klipsch R-120SW
HurricaneDitka is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 12-12-2019, 01:59 PM
AVS Forum Addicted Member
 
sdurani's Avatar
 
Join Date: Oct 2001
Location: Monterey Park, CA
Posts: 28,350
Mentioned: 230 Post(s)
Tagged: 0 Thread(s)
Quoted: 7464 Post(s)
Liked: 6590
Quote:
Originally Posted by HurricaneDitka View Post
With the front height speakers on the front wall, where would be the best location for the rear ones?
High up on the back wall.
Quote:
Is it ok to have the front ones on the wall and rear ones on the ceiling, or would it be best to put all 4 of them in the ceiling?
It is OK to have them high up on the walls, but it is much better to have them on the ceiling. In fact, there are 4 locations on the ceiling that are close enough to satisfy both Atmos & DTS:X specs.



Those locations have the height speakers around 45 degrees elevation forward & rearward of the main listening position. Easy way to figure that out: measure from your ears to the ceiling, same distance forward & rearward of you is 45 degrees elevation.

Sanjay
sdurani is offline  
post #3 of 15 Old 12-13-2019, 10:13 AM - Thread Starter
Member
 
HurricaneDitka's Avatar
 
Join Date: Dec 2018
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked: 25
So if I ditched the front wall Atmos speakers and went with 4 ceiling speakers (DIYSG Volt 6) what do you think of this? According to Dolby's guide graphic they should be closer to the listening position, but for such a small room, that seems like a lot of speakers crammed together. Also there may be more kids sitting in bean bags in front of the couch.
Attached Thumbnails
Click image for larger version

Name:	Theater Room.jpg
Views:	13
Size:	289.5 KB
ID:	2653334   Click image for larger version

Name:	ATMOS 7.1.4 Setup.jpg
Views:	14
Size:	599.9 KB
ID:	2653336   Click image for larger version

Name:	Theater Room Right Wall.jpg
Views:	13
Size:	61.4 KB
ID:	2653338  

Last edited by HurricaneDitka; 12-13-2019 at 10:19 AM.
HurricaneDitka is offline  
Sponsored Links
Advertisement
 
post #4 of 15 Old 12-13-2019, 10:54 AM
AVS Forum Addicted Member
 
sdurani's Avatar
 
Join Date: Oct 2001
Location: Monterey Park, CA
Posts: 28,350
Mentioned: 230 Post(s)
Tagged: 0 Thread(s)
Quoted: 7464 Post(s)
Liked: 6590
Top Front placement looks fine, Top Rear placement should be at/near the back wall. All 4 surrounds need to be lowered, closer to seated ear height, in order to have meaningful separation between sounds around you versus sounds above you. Can you move the seating a little more forward?

Sanjay
sdurani is offline  
post #5 of 15 Old 12-16-2019, 10:16 AM - Thread Starter
Member
 
HurricaneDitka's Avatar
 
Join Date: Dec 2018
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked: 25
Quote:
Originally Posted by sdurani View Post
Top Front placement looks fine, Top Rear placement should be at/near the back wall. All 4 surrounds need to be lowered, closer to seated ear height, in order to have meaningful separation between sounds around you versus sounds above you. Can you move the seating a little more forward?
I can move the seating a little forward, but it's an 82" TV and I'm already really close. Damn small room.
HurricaneDitka is offline  
post #6 of 15 Old 12-16-2019, 10:42 AM
AVS Forum Addicted Member
 
sdurani's Avatar
 
Join Date: Oct 2001
Location: Monterey Park, CA
Posts: 28,350
Mentioned: 230 Post(s)
Tagged: 0 Thread(s)
Quoted: 7464 Post(s)
Liked: 6590
Quote:
Originally Posted by HurricaneDitka View Post
I can move the seating a little forward, but it's an 82" TV and I'm already really close.
How close? With a 15' long room, you'll get smoother frequency response (fewer/smaller peaks & dips) with the listeners' ears 2/3 room length (10') from the front wall.

At that distance, an 82" TV will give you a small 33° viewing angle. For comparison, THX recommends a 36° viewing angle (9.2' from your 82" screen).

Sanjay
sdurani is offline  
post #7 of 15 Old 12-16-2019, 10:48 AM - Thread Starter
Member
 
HurricaneDitka's Avatar
 
Join Date: Dec 2018
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked: 25
As I have it in the drawings, it's at 10.8'
HurricaneDitka is offline  
post #8 of 15 Old 12-16-2019, 11:55 AM
AVS Forum Addicted Member
 
sdurani's Avatar
 
Join Date: Oct 2001
Location: Monterey Park, CA
Posts: 28,350
Mentioned: 230 Post(s)
Tagged: 0 Thread(s)
Quoted: 7464 Post(s)
Liked: 6590
Up to you, but I would move slightly forward so that the listeners' ears (not the seat backs) are 10' from the front wall (not the screen). Depending on how far the screen surface is from the front wall, the image size might still end up a little below the THX recommended viewing angle, but no where near being 'too close'. At least you'll be in an acoustically good listening location.

Sanjay
sdurani is offline  
post #9 of 15 Old 12-16-2019, 12:02 PM - Thread Starter
Member
 
HurricaneDitka's Avatar
 
Join Date: Dec 2018
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked: 25
Updated with ear position at 2/3rds back and lowered the surrounds a couple more inches.
Attached Thumbnails
Click image for larger version

Name:	Theater Room.jpg
Views:	8
Size:	285.7 KB
ID:	2654810   Click image for larger version

Name:	Theater Room Right Wall.jpg
Views:	6
Size:	346.6 KB
ID:	2654812  
HurricaneDitka is offline  
post #10 of 15 Old 12-16-2019, 01:25 PM
AVS Forum Addicted Member
 
sdurani's Avatar
 
Join Date: Oct 2001
Location: Monterey Park, CA
Posts: 28,350
Mentioned: 230 Post(s)
Tagged: 0 Thread(s)
Quoted: 7464 Post(s)
Liked: 6590
Better, but the rear pair of heights don't look like they're anywhere near 45 degrees elevation. Can you move them back so that they're at/near the back wall?

Also, is there anything preventing you from lowering the rear pair of surrounds closer to ear height (e.g., do you have high back seating that will block their sound)?

Sanjay
sdurani is offline  
post #11 of 15 Old 12-16-2019, 03:12 PM - Thread Starter
Member
 
HurricaneDitka's Avatar
 
Join Date: Dec 2018
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked: 25
If I made them at exactly ear height, that would make the people sitting on the two ends of the couch have a speaker 36" from their ear. That seemed too close to me, so I bought the angled flat packs for the Cobalts so they could be higher up. Do you think that's too close?
HurricaneDitka is offline  
post #12 of 15 Old 12-16-2019, 03:33 PM
AVS Forum Addicted Member
 
sdurani's Avatar
 
Join Date: Oct 2001
Location: Monterey Park, CA
Posts: 28,350
Mentioned: 230 Post(s)
Tagged: 0 Thread(s)
Quoted: 7464 Post(s)
Liked: 6590
Side speakers at ear height are going to fire directly into the ear canals of the listeners at either end of the couch. That will get distracting real quick. But that assumes the Side speakers are at ±90° from centre.

Not uncommon for 7.1 set-ups to have the Sides slightly forward of the listeners (±75-80°), since the Rears are already providing coverage rearward of the listening area. The ITU recommendation for 4 surrounds has a range from ±60° to ±150°, so having the sides a little forward of the listeners is within the spec.


Sanjay
sdurani is offline  
post #13 of 15 Old 12-16-2019, 03:48 PM - Thread Starter
Member
 
HurricaneDitka's Avatar
 
Join Date: Dec 2018
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked: 25
Oh ok. And then is this what you are suggesting with the 4 Atmos speakers to get 45 degrees for each?
Attached Thumbnails
Click image for larger version

Name:	Theater Room.jpg
Views:	7
Size:	285.3 KB
ID:	2654910   Click image for larger version

Name:	Theater Room Right Wall.jpg
Views:	6
Size:	60.8 KB
ID:	2654912  
HurricaneDitka is offline  
post #14 of 15 Old 12-16-2019, 04:05 PM
AVS Forum Addicted Member
 
sdurani's Avatar
 
Join Date: Oct 2001
Location: Monterey Park, CA
Posts: 28,350
Mentioned: 230 Post(s)
Tagged: 0 Thread(s)
Quoted: 7464 Post(s)
Liked: 6590
Yes, that height speaker placement will let you clearly hear front vs back movement overhead (your left vs right separation overhead was already good).

If you end up being uncomfortable with the surrounds at ear level, then raise them slightly. The goal is to separate sounds around you versus sounds above you. But you don't have to be ultra-strict about it if it's not practical (e.g., window right where the right Side speaker should go).

Sanjay
sdurani is offline  
post #15 of 15 Old 12-17-2019, 10:41 AM - Thread Starter
Member
 
HurricaneDitka's Avatar
 
Join Date: Dec 2018
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Liked: 25
Thank you so much sdurani. I think I will go with the ceiling Atmos speakers as I last diagrammed and I'll play around with the rear height and see how annoying it is right at ear level. I really appreciate your help.
sdurani likes this.
HurricaneDitka is offline  
Sponsored Links
Advertisement
 
Reply Dedicated Theater Design & Construction

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off