Jump to content

Bruno Putzeys - Darko interview


Recommended Posts

6 hours ago, sir sanders zingmore said:

But not when they are clipping. (I know, I know, again with the clipping)

 

I  think the error that the ASR crowd makes is probably not about audibility thresholds for amps, it’s about how much power you need in order to avoid clipping. 

This goes back to my question about consensus on clipping earlier. Surely the ASR crowd being measurement enthusiasts should be well placed to tell if their amps are clipping. It shouldn't come down to a question of how much power they need - they could determine that for themselves.  

Link to post
Share on other sites
  • Replies 95
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

I’m a regular reader/YouTube viewer/podcast listener of John Darko of Darko.Audio.  This is his most recent interview with Bruno Putzeys who doesn’t really need any introduction in this forum.  Be for

https://phys.org/news/2013-02-human-fourier-uncertainty-principle.html

😂   No. Shall we get started on what analogue media and playback suffer from (not least of all, analogue media and playback fans)? 🤣

50 minutes ago, Grizaudio said:

 

 

How much power one needs is dependant on so many factors.

 

I suspect I would rarely if ever hit clipping, with my 20watts.

Honestly, I'm not sure this is an issue everyone would have.

Too many assumptions.

 

For instance multiway amplifier setups reproducing small acoustic bandwidths would not suffer as much as full range amplifiers. High sensitivity setups also only require very few watts to operate optimally at very high SPL's.  Distance to speakers, required SPL, room size, easy to drive impedance profiles, personal hearing etc all mean this position is not necessarily valid or important.  

 

 

Of course in specific cases, specific requirements are different. I was generalising for "typical' users - speakers with passive crossovers, average efficiency (high '80s or so) in typical rooms at typical volumes. That covers enough of the audio world for me to be very comfortable saying that most people are listening to the sound of their amps clipping.

  • Like 1
Link to post
Share on other sites
On 14/01/2021 at 12:33 PM, sir sanders zingmore said:

Out of interest I looked at some other Pass Labs amps and it seems the 30.5 has significantly more 3rd harmonic than second. I assume this is also a deliberate design choice

 

The Pass range and First Watt range are very different animals.

Link to post
Share on other sites
On 13/01/2021 at 10:04 PM, Steffen said:

 

But that’s like saying “I trust my own eyes, and I’m telling you that space B is of a lighter shade than space A, science and measurements be damned”.

 

image.jpeg.3d70a05de205af9bacc41655fb35b5c5.jpeg

 

 

This.  10 thousand million percent.... this.

Link to post
Share on other sites


7 hours ago, LHC said:

a question of how much power they need - they could determine that for themselves.  

 

nope, nobody can predict it unless you measure every potential combination of amp, speaker and type of music....

 

 

 

Edited by kukynas
deleted picture
Link to post
Share on other sites
54 minutes ago, kukynas said:

nope, nobody can predict it unless you measure every potential combination of amp, speaker and type of music....

 

 

I think there is some confusion in the current discussion. There are two somewhat related, but yet different concepts:

  1. Having more power, and therefore more dynamic headroom, allows an amp to drive speakers (especially difficult speakers) to play dynamic music well (compared to lesser power amps)
  2. Different amps can sound different only because they don't have enough power and are clipping all the time. The way amps clip are different and this result in a difference in sound that is audible (and enjoyable to tube amp lovers)

Your video described the first scenario, and I agree with that concept. The video did not address the second scenario as it didn't measure clipping (although it mentioned compression). 

Link to post
Share on other sites

agreed but I was referring mainly to the point that it's hard or impossible to measure power output and potential clipping of an amp if we don't know or can't predict the load due to fact each speaker and music played would represent different and variable load that specific amp see, video just demonstrate how does it look under same condition but different music playing and if only music content can represent such difference than imagine how more variable the load would be if you connect different type of speakers   

Link to post
Share on other sites

There is a lot to take in from this interview. Bruno claims that he has mathematically solved the feedback that is applied to his design. This has the effect of making the design load invariant. A first for class d. 

 

His work with solving distortion in speaker drivers has seen Dr Rod Crawford replace the Seas Magnesium upper bass driver with Purifi in his Tikandi Grande BE.

We may all be like Darko soon, room full of Bruno"s work.

 

 

 

 

 

Link to post
Share on other sites


1 hour ago, deblur said:

This has the effect of making the design load invariant. A first for class d. 

 

 

A powerful, load-invariant class-D amplifier would make a nice mains power supply. Just feed it a 50Hz tone, set the volume so it produces a certain output voltage (load-invariant) and transform that up to 240V. 

  • Love 1
Link to post
Share on other sites
1 hour ago, Steffen said:

 

A powerful, load-invariant class-D amplifier would make a nice mains power supply. Just feed it a 50Hz tone, set the volume so it produces a certain output voltage (load-invariant) and transform that up to 240V. 

Do you believe there are audiophiles out there who pay for your idea.

 

Link to post
Share on other sites


10 hours ago, Steffen said:

 

A powerful, load-invariant class-D amplifier would make a nice mains power supply. Just feed it a 50Hz tone, set the volume so it produces a certain output voltage (load-invariant) and transform that up to 240V. 

9 hours ago, Steffen said:

Cheque or Paypal is fine ;)

 

 

 

 

Sorry, some of us have been doing this, even with call AB amps, for smaller loads for a long time. :)  Not really new.  Makes a nice motor speed control for AC motors. 

Link to post
Share on other sites
On 16/01/2021 at 8:18 AM, frednork said:

Would be interested in a link to this if you have it

I scoured the ASR site for a while and I couldn't find said blind comparison and my google foo also failed to find it so no idea where it is.

  • Like 1
Link to post
Share on other sites
On 16/01/2021 at 9:53 PM, kukynas said:

 

nope, nobody can predict it unless you measure every potential combination of amp, speaker and type of music

 

Sure you can.... for a specific speaker.    The type of music is irrelevant.... All that matters is the input signal max size ... speaker sensitivity (complex, ie. impedance phase), and the desired SPL.

Link to post
Share on other sites
3 hours ago, davewantsmoore said:

 

Sure you can.... for a specific speaker.    The type of music is irrelevant.... All that matters is the input signal max size ... speaker sensitivity (complex, ie. impedance phase), and the desired SPL.


sure you can if you know which speaker and music content, but that’s not the real life case, manufacturer or reviewer doesn’t know your specific speaker or music content when providing data sheets figures or measurements so all they can do is to take some industry standard scenario and provide those figures based on that which in mamy cases might be completely off of your situation or requirements

Link to post
Share on other sites


  • Recently Browsing   0 members

    No registered users viewing this page.




×
×
  • Create New...