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Introduction of Vera Audio Coherence 12 - a high quality speaker many can afford

For those who crave measurement with higher resolution from the last picture of the setup, here's one.

Vera Audio Coherence 12_left channel 2_higher resolution.jpg


This is with the couch in place BTW.

Frequency response is not everything though. In the development of the speaker, a lot of drivers have been tested. Several of them would perform a close in room response to this but still not sound as good or different. Directivity and distortion is likely the main cause of this. One of the strength of this speaker is its ability to both sound very open/detailed but also smooth and without harshness.
 
Can you provide a full set of measurements incl. off axis horizontally and vertically as well as distortion at different levels?
 
For those who crave measurement with higher resolution from the last picture of the setup, here's one.

View attachment 439000

This is with the couch in place BTW.

Frequency response is not everything though. In the development of the speaker, a lot of drivers have been tested. Several of them would perform a close in room response to this but still not sound as good or different. Directivity and distortion is likely the main cause of this. One of the strength of this speaker is its ability to both sound very open/detailed but also smooth and without harshness.
1742930353907.png
 
If the VAC 12 could be scaled down ~x5 to 25cm height , 5"-6" woofers - we'd have helluva desktop speakers for $500 :D
 
Can you provide a full set of measurements incl. off axis horizontally and vertically as well as distortion at different levels?
This will be provided later.
But I can tell you now what you're going to see in the directivity. Horizontally it will be uniform with 180° from approximately 200 Hz till 4.5 KHz. Above 4.5 KHz is gradually narrows. Vertically it be uniform from 200 Hz area up to 1.5 Khz and narrows. In the highest frequencies it will become very narrow vertically. This means it greatly minimizes reflections in the higher frequencies, but it also means that if you stand up and is close to the speaker a lot of the treble will be low in level.

Distortion figures have been very low in the measurements we've conducted, but I want to wait and present something accurate here. Measuring this in an environment with some bakcround noise isn't ideal.
 
If the VAC 12 could be scaled down ~x5 to 25cm height , 5"-6" woofers - we'd have helluva desktop speakers for $500 :D
Where's the fun in 5-6" woofers!?
But seriously, it's not impossible that a monitor/satelite Coherence will come. That's been on the design board to some degree, but also depends on the Coherence 12 will be received. However, such a speaker is really best to use in a studio on the desk or to use as surrounds.
 
Where's the fun in 5-6" woofers!?
But seriously, it's not impossible that a monitor/satelite Coherence will come. That's been on the design board to some degree, but also depends on the Coherence 12 will be received. However, such a speaker is really best to use in a studio on the desk or to use as surrounds.
Fun no, but many many people want a decent stereo from their TV or PC. This's a vast customer base.
 
Here's a measurement in sweetspot with different smoothings. 1/24 octave, 1/6 octave and the last is 1/3 octave.

Vera Audio Coherence 12_1 to 24 oct.jpg


Vera Audio Coherence 12_1 to 6 oct.jpg


Vera Audio Coherence 12_1 to 3 oct.jpg


No fall in the treble has been added her, but obviously that can easily be done in the DSP. Whether that's needed may depend on the music material. Very poor recordings may benefit from some fall.

While we don't get away from room modes, this is a speaker the measures very evenly placed in the room. Combined with a driver that covers almost all the the vocal area, a diffracion fee cabinet and minimization of vertical reflections the speaker both sounds open/detailed and also very smooth. This is a combination that is often difficult to achieve.
 
I want to bring up again the fact that this speaker avoids the floor cancellation. I think is something many don't quite understand how crucial is. Especially for longer listening sessions and with various music material this is really a profound effect. And unlike someone mentioned in another thread, one can't EQ such nulls and get a good result. Firstly, this would mostly be like EQing into a black hole that simply doesn't work. Secondly, those areas that might work with EQ would easily add high amounts of distortion. Thirdly, it's not going to work over a wider area anyway and the phase would not follow.

Having correct response in the mid/upper bass and only lower midrange gives a correct tonality and also makes listening far more engaging. As a matter of fact, almost all speakers out there don't really address this. So it's likley many have become accustomed to this artifact.

Take a look at in room response of other speakers, and you'll see that the area of approximately 130 Hz to 300 Hz often is too low with cancellations. And also common is to see that frequency area above this region is too high. Combined those too, and the tonality is quite off. When the floor bounce isn't addressed, one is simply lucky with peaks in the same region if this area is even and have enough level.

The Coherence 12 measures on the other hand very consistently this region placed in the room. Sure, some devaitions can happen with different placements. But generally, the speaker measures more evenly compared to most speakers on the market.

Two different placements and rooms shown below.

Coherence 12 proto response at 2.3m and 1 to 24 oct smoothing.jpg


Vera Audio Coherence 12_1 to 3 oct.jpg
 
Since this is still a speaker in development, I'll might as well show you the present near field measurement of the woofer. If it will get improved, I'll post it later.

But here's an overlay at different levels of the woofer in near field (speaker out on the floor). 1/24 Octave smoothing and showing it will two different resolutions. No EQ for sure.

View attachment 431386

View attachment 431385
wow that's some difference! Could you explain more what went wrong and why it 'should' be correct now?
 
I want to bring up again the fact that this speaker avoids the floor cancellation. I think is something many don't quite understand how crucial is. Especially for longer listening sessions and with various music material this is really a profound effect. And unlike someone mentioned in another thread, one can't EQ such nulls and get a good result. Firstly, this would mostly be like EQing into a black hole that simply doesn't work. Secondly, those areas that might work with EQ would easily add high amounts of distortion. Thirdly, it's not going to work over a wider area anyway and the phase would not follow.


Two different placements and rooms shown below.

View attachment 441453

View attachment 441454
There's also two vastly different scales and different smoothing.
Can't be comparable this way.

Measurements that we see here are usually within 50dB range.
 
wow that's some difference! Could you explain more what went wrong and why it 'should' be correct now?
As mentioned in post 70, some poor gain matching creeped in. The gain on the sound card had changed and increased a lot, leading to incorrect measurements. This was corrected with the updated measurements of the woofer.
 
There's also two vastly different scales and different smoothing.
Can't be comparable this way.
That was also the point! Showing some different scales and smoothing. And either one shouldn't be difficult to read, besides the point wasn't to compare these as this is the same speaker in different rooms. I have posted several graphs in this thread with various resolutions. More can be shared of course.
 
That was also the point! Showing some different scales and smoothing. And either one shouldn't be difficult to read, besides the point wasn't to compare these as this is the same speaker in different rooms. I have posted several graphs in this thread with various resolutions. More can be shared of course.
Yes, and the conclusion is the same, the room will dominate down low, no matter the speaker.
It could be different if cardioid for example, but still.
At one room you have a 30dB dip and at another you only have 10dB.
 
I want to bring up again the fact that this speaker avoids the floor cancellation. I think is something many don't quite understand how crucial is. Especially for longer listening sessions and with various music material this is really a profound effect. And unlike someone mentioned in another thread, one can't EQ such nulls and get a good result. Firstly, this would mostly be like EQing into a black hole that simply doesn't work. Secondly, those areas that might work with EQ would easily add high amounts of distortion. Thirdly, it's not going to work over a wider area anyway and the phase would not follow.

Having correct response in the mid/upper bass and only lower midrange gives a correct tonality and also makes listening far more engaging. As a matter of fact, almost all speakers out there don't really address this. So it's likley many have become accustomed to this artifact.

Take a look at in room response of other speakers, and you'll see that the area of approximately 130 Hz to 300 Hz often is too low with cancellations. And also common is to see that frequency area above this region is too high. Combined those too, and the tonality is quite off. When the floor bounce isn't addressed, one is simply lucky with peaks in the same region if this area is even and have enough level.

The Coherence 12 measures on the other hand very consistently this region placed in the room. Sure, some devaitions can happen with different placements. But generally, the speaker measures more evenly compared to most speakers on the market.

Two different placements and rooms shown below.

View attachment 441453

View attachment 441454
I have a theory that the “British” sound, often described as exciting and musical can be attributed to floor bounce cancellation due to the typical stand mount speaker preference and tall stands. Go back to the 70s and even small speakers were often sold with low stands with a backward tilt to make sure the lower mid sounded full and correct.

I think the other causes of British sound are just bad crossover design and lack of baffle step compensation.

Thanks for the updates on this product. I like the design principles a lot.
 
As mentioned in post 70, some poor gain matching creeped in. The gain on the sound card had changed and increased a lot, leading to incorrect measurements. This was corrected with the updated measurements of the woofer.
The differences I saw can not only be from gain differences, it looked like you did scaling in the dB domain somehow...
 
Yes, and the conclusion is the same, the room will dominate down low, no matter the speaker.
It could be different if cardioid for example, but still.
At one room you have a 30dB dip and at another you only have 10dB.
I think you need to read the post again about the floor bounce. Your comment here has no relation to this.
Subwoofer region is something entirely else and I have said several times that the room will dominate here.
 
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