Originally Posted by Mfusick
My comments were more about application, dispersion, directivity index, etc...
Being appropriate to application is the most important. I want different things from overheads than from fronts, and still perhaps different things from surrounds.
SCS8 is appropriate to surrounds and overheads, much more than 4722 so therefore it will work and sound better.
Also- using identical speakers is mostly a myth. You can't timbre match surrounds. They don't sound the same, even using identical speakers, when they are above you or behind you or the side of you- as they do from in front. This has to do with psychoacoustics and how the brain processes sound, and even the shape of the ear. You hear things behind you over above you differently than in front of you. So mix and match surrounds to LCR isn't such a big deal, and likely worth it to get an application specific match up.
If using identical speakers also matches up the application well then sure, but that rarely happens and in that case if it does not abandon the identical aspect is a smart move instead of using an identical speaker that is less ideal.
I cannot really argue any of your comments. Some things though:
*The SCS8 is not a proper horn speaker (the 8" midwoofer is the "horn") like the 4722 is. Hence I question what it's claimed 120° coverage actually means. Does it really sound the same @ +/-60° as on axis in the way a proper designed horn speaker does?
*In a Atmos setup, the Surrounds are @ listener level (4' according the guidelines), same as LCR, as in the ITU whitepapers (which are more musically oriented than THX) for multichannel surround. This means the limited vertical coverage of the horns in speakers such as the 4722 is not an issue, no more than for LCR duties. Likewise, the 120° vertical coverage of the SCS8 is not needed (it might even cause more unwanted early reflections.
*Last but not least: there's also the matter of proudly ownership of a truly over the top sound system. The 4722 will not sound 3x better, but they are 5x more impressive than the SCS8!
As for ceiling speakers: coaxial speakers like the SCS8 win, period. It's impossible for a 90°x60° horn speaker, big or small, to cover a wide listener area under the various angles needed in Atmos.