Pearljam5000
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Looks pretty interesting
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KEF Ci250RRM
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Ci250RRM-THX - Architectural Speaker | KEF US
THX-certified in-ceiling speakers designed for exceptional audio quality in home cinemas. Experience cinematic and audio excellence with the CI250RR-THX.
us.kef.com
2200 USD a piece...likely not a coincidence the same price as Synthesis SCL-5.
The one thing I'm not seeing is any angle or way to aim the Uni-Q towards the listening position. I hope I just missed it, because that's IMO a requirement for height speakers in an immersive system. And otherwise these appear to tick all the boxes and then some.
OP
Pearljam5000
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That's actually not a bad ideadoes anyone thinked about 2 giant ls50 with those?
Adi777
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I don't know if this question makes sense, but what would you say about the JBL 705p as Atmos ceiling speakers. A good idea, or maybe an excess of form over content?
Dolby specifies that if the radiation pattern is +/-45 degrees from on-axis, the ceiling channels may be pointed straight down.
Assuming they are referring to the -6dB point, that makes the Ci250RRM a candidate for straight down installation. The KEF R3 has roughly +/-45 degree radiation pattern, using the same size of Uni-Q driver.
Holy shit, I just realized this is a 3-way coaxial.
They tuned it for a flatter response off-axis, this is not supposed to be toed in.Ci250RRM-THX - Architectural Speaker | KEF US
THX-certified in-ceiling speakers designed for exceptional audio quality in home cinemas. Experience cinematic and audio excellence with the CI250RR-THX.
2200 USD a piece...likely not a coincidence the same price as Synthesis SCL-5.
The one thing I'm not seeing is any angle or way to aim the Uni-Q towards the listening position. I hope I just missed it, because that's IMO a requirement for height speakers in an immersive system. And otherwise these appear to tick all the boxes and then some.
Vacceo
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I hope these designs can be the basis for a future series of car speakers. Probably some of you guys can give a more informed opinion about how both applications can influence each other.
I think I also saw an in-wall KEF subwoofer released recently
I think I also saw an in-wall KEF subwoofer released recently
KEF already had a few in-wall subwoofers:
But, yes, there is a new one as a companion to this speaker, in the same 300mm mounting size (with a 10" driver):
us.kef.com
But, yes, there is a new one as a companion to this speaker, in the same 300mm mounting size (with a 10" driver):
Ci250RRb-THX- Architectural Speaker | KEF
Explore premium in-wall speakers designed for exceptional sound quality and seamless integration. Upgrade your home entertainment system with the CI5160RL series.
us.kef.com
There is nothing stopping someone from using the current KEF drivers in a car audio application. In the modern era of 3D printing + DSP tuning, the physical installation and setup is easy. Coaxial tech just doesn't bring the same benefits to car audio as it does home audio. The ideal tweeter location is the A-pillar, where there is no room for a coaxial driver, so the mid-range drivers end up in the doors instead.
Putting a coaxial unit in the middle of the dash would probably be optimal for sound quality, but in the modern era of touch screens, there is no room there either.
Vacceo
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They could go on door panels. Seems like that was what Lotus did.
Elitzur–Vaidman
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I'd bet that opposing Ci250RRMs and Ci250RRBs would make for a monstrous sealed stand mound speaker.KEF already had a few in-wall subwoofers:
But, yes, there is a new one as a companion to this speaker, in the same 300mm mounting size (with a 10" driver):
Ci250RRb-THX- Architectural Speaker | KEF
Explore premium in-wall speakers designed for exceptional sound quality and seamless integration. Upgrade your home entertainment system with the CI5160RL series.
This is quite something:
So the woofer is below the Uni-Q. The foam stuff apparently is the key to give the woofer a smooth response. Quite a special setup.
OP
Pearljam5000
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I can see Genelec doing something similar with the next Gen Ones
This looks like it might actually be not too hard to copy with a bit of 3D printing and some foam. Take a Seas King Coax and a 12” woofer, and profit 
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It would be an eyesore, but 705 (I’d use i not P) mounted high on the front and rear walls (I think heights right on top of you as Dolby guidance suggests is bullshit, - besides, ceiling fans are a thing, too) would be an excellent solution in terms of performance.
I don’t agree with that guidance. Also, if you don’t have them on top of you (I specified our ceiling height speakers - Pioneer EX/TAD models with folded baffle that points the coax forward and 8” woofer back - to be in Auro locations, basically) then even if they're right on axis the sound power from the heights will be tilted up. Maybe not a huge deal given the off-axis plots you've posted above, especially if the floor has reasonably absorptive covering under the speakers.
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Several years ago, ErinH used R series drivers in a Honda. He had them in the dash corners.
Recluse-Animator
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You mean OEM?
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