Exploring Purifi Woofer Speaker Builds

[lrisbo]

I remember you talked about servo effects in low frequency with a strong motor, is it the 4ohm version exhibit slightly stronger servo control effects in LF and thus "corrects" kms(x) better?

yes that too. its follows the beta=Bl^2/Re

 

[Frank207be]

The AudioXpress test of the PTT6.5M08NFA01 is online:
https://audioxpress.com/article/test-bench-the-ptt6-5m08-nfa-01-6-5-midrange-from-purifi-audio

 

[racingpht]

yes that too. its follows the beta=Bl^2/Re

Thanks for your insights! Looking forward to your 10 inchs!
One small question, any plan to put the new 4 inch NACs on your online shop?

 

[lrisbo]

the 4 inch alu is shipping now so it’s should come to the web shop soon. we are switching to a new web platform so maybe it will come there. I will ask my colleagues

 

[JanRSmit]

@lrisbo a question : the 4" nac has a response curve dropping a bit from 1kHz and up. Quite abrubt at ~1kHz, yet the other graphs( impedance, distortion) do not show an anomality at that frequency.

What is the cause?

Note i am considering using it as midrange.

 

[ABJensen]

I am working on a 2 meter planar linesource and is on the hunt for some woofers, that can be crossed over to the planar. They will be crossed over around 250-300hz . I want them in a closed box magnet to magnet. Will any of the purifies work well in a closed box , and is possible to hear them 2-3000 euros is alot of Cash. Live in Herlev.

 

[kims]

ABJensen - write to sales@purifi-audio.com and we can help you

 

[NEXTLEVEL5]

Hello what type of material tweeter is Purifi looking to go with? Ie. Beryllium,ribbon, etc?

 

[Ugg10]

Another one for the front page - DIY Kaimana by Alexander Gresler (Posted on FB DIY Loudspeaker pad)

PTT6.5x04 + SB TW29BNWG-8 in a 16l box with a Seas SP22 PR.

https://www-donhighend-de.translate...aVRrWys&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en

 

[NEXTLEVEL5]

I received my Salk Sound BePure2 and I am very impressed at how good the Purifi 6 midrange is.

 

[lrisbo]

Hello what type of material tweeter is Purifi looking to go with? Ie. Beryllium,ribbon, etc?

we are working on a 33mm long stroke alu dome with wide dispersion

 

[NEXTLEVEL5]

@lrisbo Sorry for this bring off-topic but someone mentioned Purify is working on new class D amps that will be released in Q3. Is that true?

 

[JanRSmit]

we are working on a 33mm long stroke alu dome with wide dispersion

Interesting. May i ask: The frame diameter what size will that be ?

 

[chargedcapacitor]

we are working on a 33mm long stroke alu dome with wide dispersion

Will it be built in such a way that a third party waveguide can be incorporated?

 

[agent.5]

long stroke for a tweeter? Interesting. Is it designed to cross lower?

 

[mainframe99]

we are working on a 33mm long stroke alu dome with wide dispersion

 

[ErnieM]

Finally a competitor to the Bliesma T34.
Hard to imagine better performance.
I'm guessing it'll probably have lower distortion in the 1-1.5khz range.

Excited to see what they come up with.

 

[mainframe99]

Im hoping for dual suspension, and maybe even a waveguide option. Or send a sample one to @augerpro

 

[fluid]

and maybe even a waveguide option

Waveguides are tricky with wide dispersion large aluminium domes in my experience

 

[mainframe99]

Oh I've been following, and I'm well aware. Allas the laws of physics. But one can dream.