Jump to content
Sign in to follow this  
DuckToller

Article: PURIFI Audio and the Audiophile Style reader's Q&A with Lars Risbo & Bruno Putzeys

Recommended Posts

Thanks a lot!


1. Sonore ultraRendu - Uptone ISO Regen - Mola Mola Makua - Apollon NC800 SL PRO - Thiel CS3.7

2. RME ADI-2 DAC FS - Audeze LCD-XC - Apollon NC502MP - Monitor Audio PL100

3. Hidizs S8 - Audeze LCDi3

Share this post


Link to post
Share on other sites

 

38 minutes ago, The Computer Audiophile said:

You lost me

@The Computer Audiophile

What Ralf11 imho tried to express, Prof Andersen is "The Godfather" of Danish Class D, and the last 2 years he was going strong on GaNFET's in his research.

@Ralf11

Chris edited the 20+ pages, it is less about details picking in this ocean of information.

Best Tom

Share this post


Link to post
Share on other sites

A quick peruse says it's all about the feedback - what I'll be curious to see is if that control loop is good enough to handle anything thrown at it - such as a somewhat duff PS, plenty of interference junk floating around, and speakers with crazy electrical characteristics.


Frank

 

http://artofaudioconjuring.blogspot.com/

 

 

Over and out.

.

 

Share this post


Link to post
Share on other sites
10 hours ago, fas42 said:

A quick peruse says it's all about the feedback - what I'll be curious to see is if that control loop is good enough to handle anything thrown at it - such as a somewhat duff PS, plenty of interference junk floating around, and speakers with crazy electrical characteristics.

 

I guess that is what he stressed on the article, all the different unbehaved test cases he tried, and his team of reliability experts.


1. Sonore ultraRendu - Uptone ISO Regen - Mola Mola Makua - Apollon NC800 SL PRO - Thiel CS3.7

2. RME ADI-2 DAC FS - Audeze LCD-XC - Apollon NC502MP - Monitor Audio PL100

3. Hidizs S8 - Audeze LCDi3

Share this post


Link to post
Share on other sites

https://6moons.com/audioreview_articles/purifi/

6moons got a chance to audition some demo amps. The short version: they said these amps can slug it out with the big boys, and from direct sales vendors like Nord, will probably be extremely good amps for what the audiophile market thinks isn't a lot of money. 
 

NAD is apparently coming out with a 2 channel version, it will be interesting to see how it's priced. They did some very nice NCore based implementations before this, and prices weren't in the stratosphere. 


Main listening (small home office):

Main setup: Surge protector +_iFi  AC iPurifiers >Isol-8 Mini sub Axis Power Conditioning+Isolation>QuietPC Low Noise Server>Roon (Audiolense DRC)>RPi4 (dietpi)>Kii Control>Kii Three >GIK Room Treatments.

Secondary Listening: Server>Matrix Element i Streamer/DAC (XLR)>Schiit Freya>Kii Three .

Bedroom: SBTouch to Cambridge Soundworks Desktop Setup. Living Room/Kitchen: RPi 3B+ running RoPieee to a pair of Morel Hogtalare. 

All absolute statements about audio are false :)

Share this post


Link to post
Share on other sites

Had a NAD Ncore-based amp prior to getting Kalugas.  The NAD was a very nice amp for the money.  Glad Bruno made the point that class D sounds warm, etc. if the recording is warm.  Very true.  What you don't get is homogenized sound, which can be nice when recordings aren't very good.  That isn't to say the Kalugas, for example, are ruthlessly revealing.  Quite the contrary:  I'm amazed how they sound with internet radio.  But they don't reach the amazing levels they are capable of with such material.  Good old rebook, well recorded, does produce like-live sound and that works for me.  

 

What an amazing group of talented engineers, designers, original thinkers and doers.  Thank you for the article. 


Mola Mola Tambaqui / Kubala-Sosna XLR / Mola Mola Kaluga / KS biwire / B&W 803 D3

Ethernet:  Roon > in-wall 5e > Sonore opticalModule [Sonore 5V LPS] > UpTone EtherREGEN [UpTone JS-2 LPS] + Cybershaft OP13 > DAC

Share this post


Link to post
Share on other sites
7 hours ago, PYP said:

Glad Bruno made the point that class D sounds warm, etc. if the recording is warm.  Very true.  What you don't get is homogenized sound, which can be nice when recordings aren't very good

Yep, my NCore based system sounds warm on recordings that are - such as good recordings of acoustic jazz and classical. On other stuff, mostly some modern popular music such as pop-rock-hip-hop - it can sound like too much is on the high end. But that's what's on the recording. 
Fortunately, with modern technology I can use DSP to moderate the high frequency output at the flick of a (remote) switch anytime I want. 


Main listening (small home office):

Main setup: Surge protector +_iFi  AC iPurifiers >Isol-8 Mini sub Axis Power Conditioning+Isolation>QuietPC Low Noise Server>Roon (Audiolense DRC)>RPi4 (dietpi)>Kii Control>Kii Three >GIK Room Treatments.

Secondary Listening: Server>Matrix Element i Streamer/DAC (XLR)>Schiit Freya>Kii Three .

Bedroom: SBTouch to Cambridge Soundworks Desktop Setup. Living Room/Kitchen: RPi 3B+ running RoPieee to a pair of Morel Hogtalare. 

All absolute statements about audio are false :)

Share this post


Link to post
Share on other sites

I am very happy that Purifi is also considering DIY with their modules. As amp technology is advancing to very small distortion levels it may be more interesting to focus on loudspeaker distortion. Purifi shows a mid woofer and claim it is designed to reduce driver distortion. The surround has an interesting shape: half rolled forward and half back. A rolled forward surround distorts with large movement forward (and rolled back the reverse) so does this shape really remove this distortion?

They also claim low magnetic distortion. Is this an iron less design?

Share this post


Link to post
Share on other sites

And always keep in mind: Cognitive biases, like seeing optical illusions are a sign of a normally functioning brain. We all have them, it’s nothing to be ashamed about, but it is something that affects our objective evaluation of reality. 

Share this post


Link to post
Share on other sites
28 minutes ago, sapporo said:

Was there anything more about the drivers before editing the interview?

No, this is the original response from Les Purifiens.

Not much was questioned regarding woofer&driver in the Q&A-thread, as Bruno noted in one of his answers.

Cheers, Tom

Share this post


Link to post
Share on other sites

I need to admit, that the impression has arrived with me, that Lars & Bruno's answers were somehow quite exhaustive and do not leave a lot of space  to continue questionings, if you compare for example the response1 and 2 from Bruno over @ ASR , there are now even questions about desert island discs answered, which I personally find quite interesting ... (Bruno does like the The Waterboys, so do I!)
Best, Tom

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  



×
×
  • Create New...