New Purifi Tweeter Data Sheet

Hi all, here in Europe there is at least one shop where i could pull the spec sheet

https://doc.soundimports.nl/pdf/brands/purifi/PTT1.3T04-HAG-01/PTT13T-HAG-01-Datasheet.pdf

The application information is good, never seen something so good explained from other vendors

Screenshot 2025-06-15 092010.jpg


So far - so good, Stefano

P.S.: this is the hint that VituixCAD is becoming a quasi standard even in the industry
 
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P.S.: this is the hint that VituixCAD is becoming a quasi standard even in the industry
Just because one specific manufacturer is using it? 🤨🧐

There are a ton of other companies out there, some being around for I think more than 100 years at this point.
VituixCAD is being used by a lot of companies, but I don't see why to call it "a standard".
It's one of the many great tools out there.

I personally would have liked a tweeter without a face-plate, so the user can choose the waveguide for it.
I also find it A LOT of money for so little practical improvement compared to other tweeters.
But I guess when money is no issue, sure why not.
Only if we talk about such small specific details, a proper waveguide for the job (or rather the mismatch) has a much bigger impact.

That being said, it's miles better compared to other HF transducers in the same price category.
Where proper behavior, off-axis response and directivity seems to be less than a afterthought in some cases.

To unfortunate about the nasty breakup that has to be fixed with a passive filter.
 
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I am glad you like the info. I don’t think the CAD software needs to be a standard. It’s more important to have standards for file formats to exchange response data into CAD programmes.

We show features and tricks using VCAD internally blog posts and coming data sheets. But again, these things are also possible in other tools.

But yes, we like using VCAD internally and have a good dialogue with Kimmo about fixing details and new features etc. In addition we use our internal tools that run in Matlab and we have made them compatible with VCAD.

Cheers

Lars/Purifi

PS: the data sheet has been available in our web shop since may 15th
 
@lrisbo I want to commend PURIFI for providing detailed data sheets with application notes and commentary on the design considerations. I’m surprised so few manufacturers do this. I don’t believe a speaker (or any other engineering design) simply exists as a set of specifications. There is often a thought process and design philosophy… Or at least there should be. A white paper is a manifesto on how a problem should be solved, and your company expressing its distinct point of view is refreshing.
 
All the companies should make serious DS like this one. Two tones IMD ... I'd like to see this everywhere too.

I don't understand the LR4 of the picture, though. Acoustical ? Is the notch a part of it or only there to notch the high end break-up ?
 
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@lrisbo I want to commend PURIFI for providing detailed data sheets with application notes and commentary on the design considerations. I’m surprised so few manufacturers do this. I don’t believe a speaker (or any other engineering design) simply exists as a set of specifications. There is often a thought process and design philosophy… Or at least there should be. A white paper is a manifesto on how a problem should be solved, and your company expressing its distinct point of view is refreshing.
thank you!
 
good question. the gasket will have a finte thickness when compressed. otherwise the screw pull might bend the faceplate or tear out the thread inserts in the box etc. From memory we let the gasket compress in the order of 0.5mm. On spk16 we also add some 3D printet TPU grommets to add some soft decoupling of the screws. no need to pass vibrations to all of the box.
 
that is exactly the good question. we did experiment with turning the notch on and off and my colleagues were debating if it was audible at all.

Physically possible causes for audibility would be subharmonic distortion and intermodular distortion. But again, that would require that the membrane breakup is even excited - which it is not, considering it's outside of the frequency spectrum of music / outside of the frequency range of common audio formats. Harmonic distortion & IMD can excite the breakup, but that's at worst in the single digit percent, and usually in the fractions of a percent. So, really not feasible that there's something audible about it.