Official DIY Dolby Atmos thread - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 22 Old 10-04-14, 05:25 PM Thread Starter
 
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Official DIY Dolby Atmos thread

I know there are a lot of bright people on this forum that are into making their own speakers... So since Dolby Atmos is the latest, and requires special speakers for the height channels... I decided to put this thread up to see what designs people are thinking of building to make their own Dolby Atmos height channels. I my self am interested in making a set down the road, but I need to try and make something that will also be light as it will be the in ceiling design.

From what I have read there are 2 variations of the height channels...
1: In Ceiling or on Ceiling facing downward
2: Above your existing speakers facing upward at an angle to reflect off of a predetermined spot on the ceiling.

The downside to #1 as far as I can see is the speakers will not be able to have much size in the average HT (unless you have high ceilings.

The down side to #2 is that you cannot have ceiling treatments where the speaker needs to be reflecting for height channels.

Feel free to post up your ideas and concerns about DIY Dolby Atmos Height channel speakers.

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post #2 of 22 Old 10-04-14, 05:27 PM
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I'm going g to be making some volt 8 or 10 coaxials for the job. They'll work perfectly
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post #3 of 22 Old 10-04-14, 05:28 PM Thread Starter
 
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Re: Official DIY Dolby Atmos thread

I will put up my idea... I have no idea whether or not this would work at all.

What if you horn loaded a full range driver and mounted it on your side walls facing upward, and had it flare out like a horn, bend 90 degrees at the ceiling, and bend 90 degrees more (ending up facing downward)at the predetermined height channel location?

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post #4 of 22 Old 10-04-14, 05:29 PM Thread Starter
 
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Re: Official DIY Dolby Atmos thread

Quote:
Mike Edwards wrote: View Post
I'm going g to be making some volt 8 or 10 coaxials for the job. They'll work perfectly
Mike, are you going to be making the in ceiling type or the ones that fire upward and reflect downward?

My Home Living room Theater
Samsung 65" FP, Yamaha CX-A5100, Xilica XP4080, (4) Klipsch RP160MS, (4) JBL 8340As, (2) Yamaha P2500s amps, PS3, XBox One, (1) Asus mini pc, (2) Furman Power Conditioners, Darbee Darcet, and a Project RPM 1.5 Carbon turntable..
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post #5 of 22 Old 10-04-14, 05:32 PM Thread Starter
 
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Re: Official DIY Dolby Atmos thread

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Mike Edwards wrote: View Post
I'm going g to be making some volt 8 or 10 coaxials for the job. They'll work perfectly
I just looked at them, and I noticed the 8" actually goes down 5hz lower than the 10"... Is that correct?

My Home Living room Theater
Samsung 65" FP, Yamaha CX-A5100, Xilica XP4080, (4) Klipsch RP160MS, (4) JBL 8340As, (2) Yamaha P2500s amps, PS3, XBox One, (1) Asus mini pc, (2) Furman Power Conditioners, Darbee Darcet, and a Project RPM 1.5 Carbon turntable..
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post #6 of 22 Old 10-04-14, 05:37 PM
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That's correct. The 8 is ported and the 10 sealed. The 10 can go lower in a ported box but you have to double the size of the box.

They both are supposed to sound so similar that you can't tell the difference especially if using as surrounds
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post #7 of 22 Old 10-04-14, 05:43 PM Thread Starter
 
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Re: Official DIY Dolby Atmos thread

Quote:
Mike Edwards wrote: View Post
That's correct. The 8 is ported and the 10 sealed. The 10 can go lower in a ported box but you have to double the size of the box.

They both are supposed to sound so similar that you can't tell the difference especially if using as surrounds
Would horn loading the 8" increase the efficiency?

My Home Living room Theater
Samsung 65" FP, Yamaha CX-A5100, Xilica XP4080, (4) Klipsch RP160MS, (4) JBL 8340As, (2) Yamaha P2500s amps, PS3, XBox One, (1) Asus mini pc, (2) Furman Power Conditioners, Darbee Darcet, and a Project RPM 1.5 Carbon turntable..
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post #8 of 22 Old 10-04-14, 05:49 PM
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Re: Official DIY Dolby Atmos thread

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ellisr63 wrote: View Post
Would horn loading the 8" increase the efficiency?
don't think so, especially since they are pretty wide range and VERY high efficiency coaxial drivers...95 DB sensitivity drivers can be driven to insane spl levels with even a basic receiver
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post #9 of 22 Old 10-04-14, 05:55 PM Thread Starter
 
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Re: Official DIY Dolby Atmos thread

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don't think so, especially since they are pretty wide range and VERY high efficiency coaxial drivers...95 DB sensitivity drivers can be driven to insane spl levels with even a basic receiver
So are you planning on making a box and attaching it to the ceiling? I am worried about weight as we have a double layer drywall ceiling with hat channels.

My Home Living room Theater
Samsung 65" FP, Yamaha CX-A5100, Xilica XP4080, (4) Klipsch RP160MS, (4) JBL 8340As, (2) Yamaha P2500s amps, PS3, XBox One, (1) Asus mini pc, (2) Furman Power Conditioners, Darbee Darcet, and a Project RPM 1.5 Carbon turntable..
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post #10 of 22 Old 10-04-14, 05:55 PM
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Re: Official DIY Dolby Atmos thread

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ellisr63 wrote: View Post
So are you planning on making a box and attaching it to the ceiling? I am worried about weight as we have a double layer drywall ceiling with hat channels.
yup, just do a standard cube box and hang them from the ceiling studs
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