audioguy
I just finished reading the White Paper put out by Dolby and the base requirements for the ceiling speakers that can be used in an Atmos enabled theater.  You can find that While Paper at http://www.avsforum.com/uploads/Dolby-Atmos-for-the-Home-Theater.pdf.

I'm thinking:  THIN, LIGHT WEIGHT, PASSIVE, WIDE DISPERSION !!

Any ideas or recommendations??

If Mark could build a light weight super thin (Passive) Spark (connector in the rear) and a multi-channel inexpensive DSP amp, we could be on to something.  

My guess is that 4 speakers and amps should cost between $1700 to $4600 based upon $500 to $1000 Emotiva 5 channel amp and speakers that cost between $300 and $900 (JTR).
Our Theater
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K1LL3M
A low profile spark type speaker, using the same co-ax mid driver would be ideal I imagine.

I would still prefer a powered/active setup over bringing in amp variables. A possible 4 channel break out amp like the sub one could be used if necessary to keep cab size down but still allowing Mark to have dsp control. This could be interchangeable with surround use so would maintain market demand.
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Kain
I wonder if the upcoming Catalyst on-walls could be used for this purpose?
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audioguy
Kain wrote:
I wonder if the upcoming Catalyst on-walls could be used for this purpose?


I would probably not go that direction unless the amps were separate (which Mark has mentioned as a possibility on some of his current and/or future products.  I have no desire to run a bunch of electrical up in my ceiling but am willing to run speaker wire.

I won't be doing this either today or tomorrow so we will have to see.
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Kain
I was thinking about this topic and it seems I agree that these speakers should have external amplification otherwise I'd have a problem getting power to them.
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Mark_Seaton
Kain wrote:
I was thinking about this topic and it seems I agree that these speakers should have external amplification otherwise I'd have a problem getting power to them.


The adventure of thebland's system setup gave some good insights and helped give me some ideas that I am working into the shallow designs to better allow for the expected/desired placements for Atmos and related systems.  I also have a few ideas which I don't think have occurred to those designing the hardware or speakers quite yet, but I hope to talk to those more directly involved in a few weeks at CEDIA.

The updated Spark can be powered externally in a case that will likely be similar to the outboard SubMersive HP+/F2+ amplification option I had announced here:

[1911714_10152304694159208_975214303_n] 
The 2 way Sparks make wiring easy with commonly available wire such as this Belden wire I prefer to use or even this example for a few $ less.

Mark Seaton
Seaton Sound, Inc.
sales@seatonsound.net
773-290-8436
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Kain
Thanks for the reply!

I've read that the ceiling speakers in an Atmos setup should point straight down from the ceiling (i.e. not angled in any direction). My question is what would be the best way to securely mount the speakers (most likely the updated Spark with external amplification?) to the ceiling and have it point straight down? Would screw keyholes be enough or would there be a more secure way of mounting them?
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