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PURIFI finally did a fully purified passive speaker design! The SPK 16 prototype is here - with a PTT tweeter

Holmz said:
yes - it is a port.

I am a bit interested in the tweeters. Anyone have info on those?
Click to expand...
Aluminium matériel. Apparently the results are impressive in listening sessions. Purifi again makes an impressive work as usual. The same improvement in tweeters than the medium-bass unites that I’m listening to on my Ukkonen. Superb speaker as I said. I think the port will bring the great bass response that I have on the Ukkonen on this smaller speaker. Now air flow is present and very clean deep bass response.
March audio uses beryllium as you know on the other speakers. Dome is preferred to AMT etc. Because of the clean réponse in highs.
Intensive listening in the Sydney show will determine the preferences.
I’m very interested in the results because for me beryllium has the ability inherent to beryllium smooth and very précises highs. Speed transition.
 
Penelinfi said:
It's a slot port. I wonder if it can handle 2x Purifis.
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Yes because of the inner structure also well made on the Ukkonen. I assure you on the Ukkonen that I have, for 8 months now, there is a huge bass response without pumping or airflow noise. Alan worked well on the cabinet. The result with the wave guide on the SB acoustics is a more point source approach. Very pleasant. The waveguide is the same on this purifi tweeter. Controlled forward projection.
It is for now only possible to hear them in Sidney in an hi-fi shop, it was announced l, or a the Australian hi-fi show. What a pity. The Ukkonen as the smaller Sointuva received the awards from Autralian Hi-fi.

The approche from Alan is very good. Take the great components and optimize the pack with a very good cabinet. As JMR made in France. For example.
I’m sure that the Kuoro will sound impressive:
Apparently many customers around the world, in France where I leave also. Online buy. Direct delivery. Fair prices.

I suppose Australian hi-fi will review the new Kuoro.

I recommend strongly the March audio speakers because of their fair approach.
 
What? said:
Aluminium matériel. Apparently the results are impressive in listening sessions. Purifi again makes an impressive work as usual. The same improvement in tweeters than the medium-bass unites that I’m listening to on my Ukkonen. Superb speaker as I said. I think the port will bring the great bass response that I have on the Ukkonen on this smaller speaker. Now air flow is present and very clean deep bass response.
March audio uses beryllium as you know on the other speakers. Dome is preferred to AMT etc. Because of the clean réponse in highs.
Intensive listening in the Sydney show will determine the preferences.
I’m very interested in the results because for me beryllium has the ability inherent to beryllium smooth and very précises highs. Speed transition.
Click to expand...
AsciLab thread should be of interest.
Go to post #1028
 
Azrael said:
I don't get ist: how is it possible that such a small port does not produce any noise while using woofers with such a high Vd?
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I could break my Ukkonen to see inside but the result would be awfull.
Alan never published an inside schema of his speakers.
I suppose a wood labyrinthe with good damping material and complex angles. And great inner reinforcement to avoid vibrations. By tapping on the Ukkonen it is clear that the inner design is great.
I've got two monoblocs with purifi 1ET9040BA Amplifier Module and hypex power. Amazing. Even with high volume the bass respons is clear without noise from the port. The Ukkonen are taller than the Kuoro. The port looks also proportionally very thin. PTT8 ex.woofer.
Hope we will hear more about this after the AHi-fi Show.
 
Azrael said:
I don't get ist: how is it possible that such a small port does not produce any noise while using woofers with such a high Vd?
Click to expand...
Check this video out. You would sometimes think that it's almost impossible, but modern math and simulations, can actually make ports work quite well, when done just right:

All about flow, speed and volume, at a given frequency.
 
What? said:
Specs will come soon.
Click to expand...

From show review pics, the new tower does not appear to have made it.

Wonder if it has something to do with the new tweeter availability?
 
Digital_Thor said:
Check this video out. You would sometimes think that it's almost impossible, but modern math and simulations, can actually make ports work quite well, when done just right:

All about flow, speed and volume, at a given frequency.
Click to expand...
The video deals with several topics, BR ports are just one of them. And I do see something like a curved port, but in the end all the ports have surfaces on their outputs that almost look a bit like Sd/2, which is completely different from the Ukkonen. It's also not as if the explanations of the BR principle are new to me.

In short, the video does not explain such a small port in the context of a driver with such a high Vd.
 
Azrael said:
The video deals with several topics, BR ports are just one of them. And I do see something like a curved port, but in the end all the ports have surfaces on their outputs that almost look a bit like Sd/2, which is completely different from the Ukkonen. It's also not as if the explanations of the BR principle are new to me.

In short, the video does not explain such a small port in the context of a driver with such a high Vd.
Click to expand...
Ok. I remembered a bit wrong. In the video at 6:18, they have some kind of restriction in the middle of the port.
The port was bigger to begin with, but got quite small in the middle, questioning the classic design of a port, which usually is just a tube.
But now that I rewatch the video, I actually think they aimed for a more laminar flow, by first having an open port - then restrict it - and then open it again.

We actually did that in the plastic industry, to even out the speed of the plastic flow, by first restricting it a bit - kinda like a speed bump, and then open up the pathway - widen it - as you increase the area again. This "equalized" the flow, so that the speed of the medium traveled at the same speed along the sides as in the middle - hereby getting a laminar flow.
But I see your point with that narrow, thin slot at the bottom. But hey - if it works - it works :)
 
Lars Risbo said:
March showed the Kuoro with our new tweeter. Alan updated me. well received.
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Hi Lars,
Did he reported about the feeling of listeners? It was like a test?
If the tweeter is so good as your ushindi PTT 8 on my March Audio Ukkonen and your purifi power modules… no doubt.
 

This guy has the names mixed up but both tower March Audio speakers were there. The music seems like your general hifi show type gentle, slow with vocals and separated instruments ready for critique
 
Penelinfi said:

This guy has the names mixed up but both tower March Audio speakers were there. The music seems like your general hifi show type gentle, slow with vocals and separated instruments ready for critique
Click to expand...
Yes in red the Kuoro and in blue the Ukkonen video by Tabi from this year 2025 Ausi Sidney show. Probably because on some videos before Alan March had the Ukkonen in red. As on the website from March Audio.

 
Agree, looks as though the Kuoro made a later appearance.
 
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