Hi.
This is Kali audio's 8-inch 3-way coaxial speaker IN-8 V2.
First, SPL/FR.
It is quite flat except for some HF.
And 37.6hz(-6dB)
This speaker seems to be doing the right thing.
Next is the directivity.
This speaker has good horizontal and vertical directivity.
Next is the beamwidth.
It's also well controlled.
This is a polar plot.
It shows a smooth attenuation across the front as well as the rear.
It seems to have been significantly spent on product design and enclosure design.
The Harmonic distortions.
In the 95dB SPL measurement data, there was data that was outside the existing specifications, so we modified it and added it.
In addition, we found unusual things in both 85dB SPL data above.
We'll talk about this later.
Next is the multitone distortion.
Overall, it is compliant, except for very high peaks around 300 Hz.
Multiton distortion for each output.
I found nothing unusual about the multi-tone distortion caused by the increase in SPL.
This is a compression test.
Lastly...
A strange flaw has been found in this speaker.
The above is the THD measurement data of 85dB and 95dB SPL that we discussed earlier.
There is a problem with the HOHD (High Order Harmonic Distortion) on the above data.
In general, I use the Klippel template when performing distance measurements such as Multitone distortion and Harmonic distortion.
Therefore, it automates it and waits outside the measurement space.
But in the case of directional measurements, you have to turn the rotating plate manually, so you have to face the speaker in the measurement space, and in this measurement, you can hear some crazy noises as soon as you turn the sine sweep.
I immediately stopped measuring and performed unit proximity measurements for cause analysis.
Measurements showed that the woofer unit was innocent, but a problem was found in the Twitter-mid coaxial unit. (200~400hz)
I also performed near field measurements around the coaxial unit assembly.
But the noise was most evident in the coaxial unit.
It's much smaller than THD and less than 0.2%, but...
It's easy to hear, it's annoying.
Anyway... I'm going to show you a video of what this actually feels like.
I immediately contacted the owner of the speakers and asked him to test the rest of the sample, and the same symptoms were observed in it.
Above is the image sent by the speaker owner after taking the remaining sample B with a sine sweep.
As a result, I think it is more likely that it is not an individual sample defect.
(Because the same symptoms were found in the two samples.)
Currently, it is estimated that the structure inside the coaxial unit is caused by shaking or touching each other above a certain sound pressure.
The scary thing is...
These characteristics are not shown by typical THD measurements.
This is a personal comment.
If you listen to music on 85dB SPL or louder, it is difficult to recommend.
Of course, I can't answer the question of where I can get a good DI, 8-inch, 3-way coaxial speaker for this price, but in the end... I can't recommend listening to high SPL.
The advantages of the 3way structure are also almost fading.
And I've measured and reviewed the same series, IN-5.
But I think I missed something because of my mistake.
I don't know if these speakers used the same coaxial unit.
At that time, I measured and reviewed the speakers with REW, not Klippel software and equipment.
Since I underestimated the effect of speaker output on frequency magnitude response, I measured it with a relatively small SPL when conducting Directivity measurements.
However, directivity measurement is almost the only process in which I can hear sine sweeps directly during speaker measurement.
And that's what made me think that I might have missed quite a few flaws.
How about the tests of other members who own these speakers?
This test requires a high SPL at 200 to 400 Hz.
This is Kali audio's 8-inch 3-way coaxial speaker IN-8 V2.
First, SPL/FR.
It is quite flat except for some HF.
And 37.6hz(-6dB)
This speaker seems to be doing the right thing.
Next is the directivity.
This speaker has good horizontal and vertical directivity.
Next is the beamwidth.
It's also well controlled.
This is a polar plot.
It shows a smooth attenuation across the front as well as the rear.
It seems to have been significantly spent on product design and enclosure design.
The Harmonic distortions.
In the 95dB SPL measurement data, there was data that was outside the existing specifications, so we modified it and added it.
In addition, we found unusual things in both 85dB SPL data above.
We'll talk about this later.
Next is the multitone distortion.
Overall, it is compliant, except for very high peaks around 300 Hz.
Multiton distortion for each output.
I found nothing unusual about the multi-tone distortion caused by the increase in SPL.
This is a compression test.
Lastly...
A strange flaw has been found in this speaker.
The above is the THD measurement data of 85dB and 95dB SPL that we discussed earlier.
There is a problem with the HOHD (High Order Harmonic Distortion) on the above data.
In general, I use the Klippel template when performing distance measurements such as Multitone distortion and Harmonic distortion.
Therefore, it automates it and waits outside the measurement space.
But in the case of directional measurements, you have to turn the rotating plate manually, so you have to face the speaker in the measurement space, and in this measurement, you can hear some crazy noises as soon as you turn the sine sweep.
I immediately stopped measuring and performed unit proximity measurements for cause analysis.
Measurements showed that the woofer unit was innocent, but a problem was found in the Twitter-mid coaxial unit. (200~400hz)
I also performed near field measurements around the coaxial unit assembly.
But the noise was most evident in the coaxial unit.
It's much smaller than THD and less than 0.2%, but...
It's easy to hear, it's annoying.
Anyway... I'm going to show you a video of what this actually feels like.
I immediately contacted the owner of the speakers and asked him to test the rest of the sample, and the same symptoms were observed in it.
Above is the image sent by the speaker owner after taking the remaining sample B with a sine sweep.
As a result, I think it is more likely that it is not an individual sample defect.
(Because the same symptoms were found in the two samples.)
Currently, it is estimated that the structure inside the coaxial unit is caused by shaking or touching each other above a certain sound pressure.
The scary thing is...
These characteristics are not shown by typical THD measurements.
This is a personal comment.
If you listen to music on 85dB SPL or louder, it is difficult to recommend.
Of course, I can't answer the question of where I can get a good DI, 8-inch, 3-way coaxial speaker for this price, but in the end... I can't recommend listening to high SPL.
The advantages of the 3way structure are also almost fading.
And I've measured and reviewed the same series, IN-5.
But I think I missed something because of my mistake.
I don't know if these speakers used the same coaxial unit.
At that time, I measured and reviewed the speakers with REW, not Klippel software and equipment.
Since I underestimated the effect of speaker output on frequency magnitude response, I measured it with a relatively small SPL when conducting Directivity measurements.
However, directivity measurement is almost the only process in which I can hear sine sweeps directly during speaker measurement.
And that's what made me think that I might have missed quite a few flaws.
How about the tests of other members who own these speakers?
This test requires a high SPL at 200 to 400 Hz.