Revel C763L In-ceiling Speaker Review

[Robbo99999]

These ceiling speaker reviews are interesting, but we just don't know enough about what measurements to aim for....and as they are such an unknown I think they're best to be avoided unless you don't have other options. But it'll be interesting to see what Amir comes up with re some other ceiling speaker measurements along with subjective listening, although I think subjective listening should be done in correct orientation - speaker above and listening subject at correct angled position under the speaker. The reason I think this is important is because HRTF's will be different for different incident angles (above & below subject will be different). Additionally, it might be interesting to add the difference between a "ceiling HRTF" and a "normal horizontal floor HRTF", add that difference to the spinorama to see if it fills in the large dip in the frequency response 1kH-3kHz.

 

[Bartl007]

Just to give some real world perspective, here is the c763L as measured in my acoustically treated listening space, spatially averaged over 6 microphone measurement points across 2 seating rows.

The other 3 speakers used for in ceiling atmos show a very similar measurement pattern.

I have no complaints once eq is applied

 

[D700]

Is it 'possible' that a 'popcorn' like ceiling helps disperse the sound? I have heard of this 'subjectively' happening with 'flocking' (like in a jewelry box) applied to the front speaker mounting board facing the room.
Whether it is true or not remains for someone to do with a baffle board and speaker mounted to it. How would a 'flocked' or 'popcorned' baffle board affect the measured sound?
I have never seen any measurements on this done, although I have seen it done (and heard speakers that it has been done to [which subjectively sounded fine to me but I don't know what they would have sounded like to me before that was done]) with 'flocking' on the so called 'monkey coffin' style of speaker.
It is said to have a similar effect as rounding the edges.
Does anyone have any measurements on this?

Wouldn't @amirm 's fancy measuring thingy be valid if speaker were mounted within its expected angle of dispersion at suitable distance from machines microphones? Same kind of thing as measuring response at different heights, except now it would be an angle at a given distance. Surely there's some standard for this?

For that matter, I could cut holes in my ceiling, install a set of height speakers, buy set of towers with height speakers built in, then just do A/B comparison using the height speakers as Stereo Only channels to see which deliver best response. My preference would be for someone else to do it

 

[amirm]

Just to give some real world perspective, here is the c763L as measured in my acoustically treated listening space, spatially averaged over 6 microphone measurement points across 2 seating rows.

The other 3 speakers used for in ceiling atmos show a very similar measurement pattern.

I have no complaints once eq is applied
View attachment 265251

That correlates well with my measurements. Your scale is larger vertically which makes the variation smaller but otherwise, we see all the deviations from flat in same spots.

 

[EJ3]

My preference would be for someone else to do it

Me too!

 

[Dj7675]

These ceiling speakers are extremely interesting and valuable for those looking for options other than on ceiling speakers. It is a great engineering challenge (flush mount in ceiling, sound good about 45 degrees off axis) rand interesting to see how different brands go about it. A few years ago these are often recommended on AVS but I saw the spinorama and just couldn’t see using them. At the time, went with on ceiling (Revel M55XC) but my ceiling height just couldn’t accommodate them hanging so low. So you look the best ceiling speakers you can find. Testing of these is nearly non existent so all the work on these (building baffle etc) is much appreciated. Look forward to a few more

 

[lewdish]

I love seeing more of these in-wall/in-ceiling architectural speaker measurements and reviews ~ Its such an underserved place.

 

[Sal1950]

My city has banned wood burning for almost a decade. Is it still something common in the rest of the world?

Well that sucks.
I don't need much heat here in FL but lots of friends in the northern US are heating their homes with wood.
A very economical way when you live in rural areas where trees are easy to come by.