The Belgian-Danish source of audio greatness in Roskilde / Denmark have achieved to provide something to the community that many DIY speaker enthusiasts were hoping for.:
A PTT tweeter !!!
They've put that little thingy called PTT 33 tweeter - which Lars Risbo describes as:
"
33mm alu hard dome with +-1 mm linear stroke, low distortion. Dome optimised for wide dispersion. Non resonant nautilus style rear chamber. demo speaker uses tweeter in 147mm waveguide optimised for constant directivity in the box. a phase plug /coherer near throat of the wave guide widens the dispersion. +-70deg beam width to 20kHz"
- into a reference design stand mount speaker named SPK 16.
The tweeter radiation pattern sows an exeptional horizontal dispersion (inbox, 1m), an achievement the PURIFI
engenii seem to be proud of ;-)
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Lars Risbo wrote me that it is crossing over around 2kz and the full crossover network was developed in-house. The F3 is 32Hz and its response is working flat into 37Hz says the press release, which is attached to the posting.
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The SPK 16 prototype:
The standmount speaker (I'll bet it will be in PURIFI red at the Munich show!) is a 22 liter reference design, with the new PTT33 (mm) aluminum cone tweeter and the 4-Ohm PTT6.5X04-NAA woofer, feat. 2x 6.5" Passive Radiators - side mounted.
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He has written a white paper about the prototype which will be published in time for the MHE. As I was enjoying reading it, I ask about pre-releasing the chapter 1 and 2 about the goals to reach and challenges they tried to master, which he gently agreed to.
Here are page 1 and 2 of the WP by Lars Risbo.
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The other four chapters will be released in time for the MHE and as far as I can judge the company, they will be happy to discuss their ideas with you !
Purifi will be a the Munich High End
show (Hall 1, A8 - Munich, May 18-21, 2023) and they have an open show room at
Saturday afternoon in a more privative environment.
(see attached press release for more info)
The company has announced the following premieres next week.:
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Final words come from Bruno:
“DON'T MISS THE OPPORTUNITY TO HEAR THE SPK16 DEMO WITH THE NEW AMPLIFIER GENERATION – IT’S QUITE A TREAT! “