New Purifi 6.5 midwoofer

[RickS]

Purifi is previewing a new woofer and a couple of midranges based on the same improved IM tech as the original offerings.

Here is the pic of the new woofer sporting an aluminum cone and better T/S parameters for vented alignments.

More details here. One negative is a yet even higher price than the paper versions!

 

[milan616]

Rick, do you know the reasoning for the four little mountain ranges in the surrounds?

 

[Hayabusa]

Rick, do you know the reasoning for the four little mountain ranges in the surrounds?

• Low Surround Radiation Distortion
  • The surround contributes to sound output. Conventional surrounds produce distortion as they deform. PURIFI’s Neutral Surround geometry avoids this mechanism without constraining motion. This reduces harmonic distortion as well as intermodulation distortion.

 

[Lorenzo74]

Purifi is previewing a new woofer and a couple of midranges based on the same improved IM tech as the original offerings.

Here is the pic of the new woofer sporting an aluminum cone and better T/S parameters for vented alignments.

View attachment 153577

More details here. One negative is a yet even higher price than the paper versions!

Let’s have a look at this implementation

Purifi-6R

@amirm any chance to get your hands on one of troels‘ creatures?
my Best Regards
Lorenzo

 

[AnalogSteph]

More details here. One negative is a yet even higher price than the paper versions!

At least performance seems to be slightly better as well. H2 seems to have been reduced, and midrange distortion in the 1-3 kHz range is basically rivalling the 3" dome in the KH310 now! (It wouldn't have the same insane level handling though, power handling would be limiting things around 108 dB SPL.)

 

[Postlan]

They will release 4"? It could be a direct competitor to Neumann, and finally ATC.

 

[RickS]

Recent interesting article published by AudioExpress and posted to Purifi website…

Some Speaker Problems That Needed Solving - PURIFI

Some time ago we posted on our website a pair of sound demos that we thought were quite instructive. One showed that Doppler distortion was much less audible than an equivalent amount of amplitude modulation, thereby sinking a lot of “masking theory” based audio discourse. The second shows that...

purifi-audio.com

 

[bolserst]

Thanks for link to article!

You can also hear a description of purpose of the surround geometry in Erin's interview with Lars Risbo of Purifi (46:27 thru 57:00)

46:27 - Erin asks question beginning discussion of Purifi’s very unique surround. Lars begins answer with Christmas disappointment anecdote about how after making major improvements in magnetic circuit and motor hoped for distortion reduction ‘barely moved’. This led to investigations into distortion contribution by the surround flying under the radar. Again this led to rediscovery and use of research industry previously ignored.

The previous research mentioned was part of the Danish LoDist project.
See this AES Convention paper for more details.
https://www.aes.org/e-lib/browse.cfm?elib=7684

 

[Biblob]

Hold your beers!

Lars Risbp from Purifi Audio promoted there will be a 8" version of the Purifi woofer! See this post

​

Hi Piotr, good news is that a paper version of our coming 8" will probably meet your 90dB/W (aka 8 ohms) sensitivity and it has 10mm linear stroke and an Sd of 233cm2 so can move quite some air. I am polishing the design in simulations currently. Why would you prefer to linearise Bl using the gap/magnet rather than our variable winding pitch method? There is more to it than Bl(x) since we also need to keep inductance independent of position. Cheers, Lars​

 

[sarumbear]

Rick, do you know the reasoning for the four little mountain ranges in the surrounds?

They are defects! Same as Genelec woofers'

 

[FrantzM]

They are defects! Same as Genelec woofers'

You beat me to the punch!! !

 

[Yevhen]

Purifi is previewing a new woofer and a couple of midranges based on the same improved IM tech as the original offerings.

Here is the pic of the new woofer sporting an aluminum cone and better T/S parameters for vented alignments.

View attachment 153577

More details here. One negative is a yet even higher price than the paper versions!

Do you personally like the sound of Purifi speakers? As I understand, you've tried a lot.
I've used their woofer with different tweeters but still for some reason prefer the sound of 2x cheaper Wavecor or Satori woofers.

 

[RickS]

Do you personally like the sound of Purifi speakers? As I understand, you've tried a lot.
I've used their woofer with different tweeters but still for some reason prefer the sound of 2x cheaper Wavecor or Satori woofers.

TBH, do not have any good contemporary reference for comparison with the Purifi woofer. Also my major listening time with them has been with the SB passive radiator. Without a comparo where it is the only difference between 2 speakers, would be reluctant to pass judgement.

Otoh, have not heard anything I would consider a major flaw at this point.

 

[Savi]

Do you personally like the sound of Purifi speakers? As I understand, you've tried a lot.
I've used their woofer with different tweeters but still for some reason prefer the sound of 2x cheaper Wavecor or Satori woofers.

I have never neither purifi or satori but you read hificompass review on its website. He gives objective measurement and its subjective impression of purifi vs satori vs scanpeak.

 

[RickS]

Had a small window to get in a measurement and listen to these but will have to wait....

The inner diameter is larger than the paper cone version, so my attempt to swap into Directiva r1 failed.

My speaker measurement lab (aka the Sykora family room) needs to be set up for holiday entertaining. Will try again after Christmas.

Happy Holidays!

Rick

 

[Adam Bernau]

Hi guys,
just wanted to let you know that the new Purifi aluminium cone midwoofer is excellent. I am in the middle of testing it in my active studio monitor prototypes and i couldn´t be happier. Highly recommended!

 

[bigjacko]

Hi guys,
just wanted to let you know that the new Purifi aluminium cone midwoofer is excellent. I am in the middle of testing it in my active studio monitor prototypes and i couldn´t be happier. Highly recommended!View attachment 173477

It looks like a monster. What are the drivers and dimension of the box?

 

[Penelinfi]

Hi guys,
just wanted to let you know that the new Purifi aluminium cone midwoofer is excellent. I am in the middle of testing it in my active studio monitor prototypes and i couldn´t be happier. Highly recommended!View attachment 173477

Did anything come about with these Ondwey designs? I see a few different speaker pics online but not sure if they did anything more than for their own use