Inventor Bruno Putzeys talks about Kii Three Speakers
Вставка
- Опубліковано 6 лип 2024
- In July Kii invited professional sound engineers and producers to Red Bull Studios in London to listen to the Kii THREE professional studio monitors. It was a chance to hear the inventor Bruno Putzeys speaks about why he designed the Kii THREE Active Monitors and the technology behind them. Find out more about Kii THREE professional studio monitors here kiiaudio.com/en/prod-pro.html
One day soon I will own a pair.
Watching from Kenya.
Learn a lot from Bruno and appreciate that he gives so many talks about the Kiis tech and also just audio tech in general.
The man is sheer genius. This product has been on my want list for at least an year now. Hopefully i'll get them in october! ;)
Agree with that. Have you listened to the speakers?
I own them and they sound great! I only did 4 dB reduction of the high frequencies on the Kii Control to get them exactly right for me.
Great looking speakers! Their finish is beautiful!
Utterly mind blowing.
Seems like a brilliant man
Bruno is an audio genius.
After listening to Bruno I pushed my Kiis closer to the front wall and reduced the boundary number a couple of dB. It worked wonders for the bass.
Wow!
Love the shirt Bruno :-)
is that batik?
These are awesome speakers I've heard them personally they look awesome but God damn they are 11 grand and the controller is 1600 I wish I had a rich friend I would love to have the opportunity to have them
I hope in the future they make a Kii 2 or something, a smaller less powerful version of this, half the price,and I would take the plunge if their about as good..
both of these guys have an impressive sub under their shirt
As a result of their work, both of these men suffer from Stage 4 gastric cardioid dispersion. You can help them by buying these speakers. For just the price of a cup of coffee ($3) every day for 15 years. (ididthemath)
Why not just headphones + head tracking + compatible binaural recording? Bass isn't directional anyway, so you can slap a sub somewhere for the lows.
How do they take care of the vertical dispersion without a coaxial coincident driver? The Dutch & Dutch 8C seems to ignore this as well: Locked in a vertical plane just like all other legacy speakers if using them nearfield, if you stand up for a moment watching a movie, adjust your chair, etc.
The vertical dispersion at the crossover frequency is indeed a bit narrower than over the rest of the audio band. The practical effect is quite benign. Since the crossover is Linkwitz-Riley, the maximum points perfectly forward, so you need to be quite far up or down before you actually start hearing a dip at 2k. This is certainly a more acceptable compromise than using a coaxial driver. The problem with those is that they place a dome in a moving horn (!) which causes the MF to phase modulate the HF. This rather defeats the advantage of using a tweeter at all...Hope this helps - if you have any more questions please dont hesitate to send us an email on info@kiiaudio.com
@@KiiAudio That makes sense in a two way, but Genelec has a $10,000 speaker that mentions that issue which they fix by making a three way speaker so that the mid-range driver isn't moving hardly at all and the woofer that would cause IMD is separated.
Great product in any case, just always curious about design decisions. Hopefully in a couple of months I'll have heard this Kid Three and the Genelec 8260 and know which one works best for me.
The Kii is certainly more beautiful.
@@KiiAudio
Bruno! Thank you for sharing some of the details on the design & driver/DSP implementation of your Kii THREEs! Very impressive. :)
Though a completely different design, I believe Bob Carver's 2017 ALS use side-firing drivers in a similar way, sans DSP, IIRC?
Regarding the use of Coaxial MF/HF drivers and the inherent modulation of the HF by the excursion of the moving MF cone/"wave guide"...
I've been toying with a DIY studio monitor design using the BMS 5CN162HE 5" concentric/coaxial midrange & HE/HF compression drivers mated to the 10" Ciare HW251N midwoofer/midbass drivers.
As the BMS use a HF compression driver and not a dome-type tweeter, it might somewhat mitigate the midrange cone/HF dome interface and the resulting HF modulation to some extent? This is what I'm finding (I think).
Measurements aside, in my listening tests, if I keep the HPF of the BMS 5" midrange cones in the 280-400Hz range (LR4), instead of say 150-250Hz, this minimizes the excursion & movement of the midrange cone that's being used as the HF "waveguide" for the compression driver, and thus HF IMD seems to be much lower, which audibly (to my ears) greatly improves coherency. :)
The BMS concentrics have proven to be fantastic drivers IME so far. :)
The bandpass I'm using for the 10" Ciare midbass drivers are in the ~60Hz-350Hz range (also LR4 on both ends IIRC). I'm filling-in the low end with my Transaudio/Subwoofer Pros Studio Sub 18.
Yeah, it's quite a bit larger of a setup than your miniscule THREEs, but hey, they fit my room and the price is right! :-P
For flexibility in testing I'm using the miniDSP C-DSP 8x12 V2 for DSP duties (X/O, EQ, Delay, etc.). Just got the Dirac Live update and starting to play with that as well. Very promising.
Also have the Audiotec-Fischer Helix DSP Pro MK II (10 channel) and Zapco HDSP Z16 V (16 channel) DSPs which are both from the car audio realm. www.zapco.com/hdsp-5-series
For the moment, I'm using a few of the tiny Biketronics Titan multichannel amplifiers for my testing. These use the Hypex UcD modules and have proven to be quite good in the "straight wire with gain" department. :)
Curious as to what you are using for the 12 channels of amplification in your THREEs??? It's truly impressive what you've been able to physically pack into your THREEs' cabinets in terms of Drivers, DSP, PSU, & Amplification!
Since I have a few extra DSP & amplifier channels to play with, and some extra drivers laying around, I might have to try some of your "directivity steering" tricks. :-)
Once again, thank you for your willingness to share some of the tech behind your awesome Kii THREEs! 👍 Good stuff!
@@bbfoto7248 The Kii three uses NCore technology amplifiers (250W custom version).
As for directivity controlling tricks, the D&D 8C started out as a diy project. You might want to check those threads out at diyaudio.com!
@@hidjedewitje
Thank you. I've been following the Dutch & Dutch 8C. :)
And my buddy Erin at www.erinsaudiocorner.com and ASR has recently measured and reviewed them. Quite impressive.
It was actually Erin who pointed me towards the BMS & Ciare drivers I'm using.
In regards to amplification, I've already been using both Hypex UcD & Ncore based amplifiers from Biketronics/Vivid Amps for this project and in my car audio system as well. :)
Cheers
Bruno is making the case for constant directivity (whether cardioid , omni or dipole) and I completely agree on this . So why is there only 1 tweeter ? This 1 tweeter can never support a frequency independent cardioid response me thinks ...
I think a tweeter does always gives an cardiod like response. this tweeter also has a small waveguide to help with dispersion, I don't see the problem in this case. And I heard the speakers and OW MY GOD!! soo good! and it really works.. the bass response is something you never heard before.. so precise and clean , articulate..have you heard them?
The problem of unidirectional sound propagation starts at ~700Hz and below.
And that's why you're a commenter on youtube and Bruno is a genius designer.
Someone help me out and send it to my crib please be the best gift ever
Songwriters absolutely need the reality of honest reflective responses live and during recording.
Is there an affordable version for our own studios ?
I really do not understand how any speaker can sound amazing in anechoic room
Bruno Putzeys: To that I can only say: "you have to try it". The myth that speakers don't sound good in an anechoic chamber gets repeated time and time again in audio circles and I have no idea where it comes from. It's completely untrue. Many more speakers sound good in an anechoic chamber than do in a real room. The reason is obvious: almost all speakers are designed (and tested!) to be quite flat on-axis in an anechoic setting. In an anechoic chamber that is precisely what you'll end up hearing. I've had hours of pleasure listening to the frankly unbelievable stereo image thrown by even a modest pair of studio monitors. The real trick is to build speakers that can approximate this in a room that bounces the off-axis output back at the listeners too and that of course is a problem that most speaker designs ignore. But to stay on topic: try it. If you haven't got an anechoic chamber to play with, find a quiet location out in the open. It's quite something. I guess that people who say they don't like anechoic chambers actually do so because they're so quiet. That, I have to admit, can be disconcerting. Listening outdoors gets around that nicely.
@@KiiAudio I was in anechoic chambers and hated how my ears perceived sounds....is very uncomfortable...maybe the speakers "perform better" from a technical point of view. that was the intention and make sense...but I do not think I can enjoy anything there...
@@bluematrix5001 Yes of course it is unpleasant because the brain dislikes absolute silence.
This is a super informative talk but only got 137 ups....
And ofcourse you can get a perfect cardioid dispersion by using 1 woofer (or midrange) in an open baffle U-frame . Much simpler and no cabinet vibrations or evil backwave as a bonus , but you need much more air displacement to battle the (18db/octave vs 12 db for closed box fall) open baffle inefficiency
Closed speaker cabinets are addictive too though :)
Completely Open Baffle speakers work more as a "Figure Of 8" polar pattern, with the largest nulls (cancellations) only at each opposite side, i.e. at 90° & 180° off-axis to the front and rear of the baffle.
The energy that is radiated to the rear and reflected will be frequency-dependent in relation to the distance to the rear boundary (and somewhat to the side wall boundary as well).
Bruno is doing something similar...but actually quite a bit different. It is Cardioid pattern that only radiates to the front of the speakers, not a bi-polar cardioid. There will be much less comb filtering with his design, resulting in much better/smoother amplitude response and phase coherency in front of the speakers in the room, and at the listening position.
@@bbfoto7248 You're both right and wrong but I learn something new here . Open baffles with symmetrical (rear to front) frames radiate in a figure of 8 . A typical example is an H-frame : just a baffle with wings that extend just as deep to the rear as to the front . An unsymmetrical baffle radiates more like cardioid . Example of this would be a U-frame : same as an H-frame but with the front side wings removed . New to me is the non bi-polar cardioid in the Kii audio speakers . That explains the constant directivity of these spekers despite the use of that tweeter which could never have a bi-polar cardioid radiation . Nice , very nice trick ! My hat off to Bruno , he's even smarter than I tought .
i cant see this, he needs someone to speak for him
Oh just shut up will you. We all get it, hes so far above your level, your pea sized brain has no chance in keeping up.
Bell end
chaiwa, you need someone to think instead of you ..
Is a pain to listen his speech
It doesn't matter. He's a genius, he invented the best speakers for audio engineers. He won.
How rude...
Andrei Piatra not sure why his speech should be a pain but you also can’t say “best”.
There is no best, he even said it in the beginning.
Yea! What a prick.
Sorry his stammer is inconvenient for you. Dick