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Are Class D Amplifiers really "digital"?


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6 minutes ago, fas42 said:

 

 

 

Looks like Paul agrees with Wikipedia.

 

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Many people believe that Class D amplifiers are actually digital when Paul argues just the opposite. Find out how a class D amplifiers work and what the differences between Class D and digital are.

 

Everything matters... when brewing coffee.

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 #30

How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file.

PROFILE UPDATED 28-06-2020

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6 minutes ago, kumakuma said:

@sandyk

 

Please leave this thread or tell us why you feel the need to mark every post in this thread as off topic.

Better still, you leave this Sub Forum as you are going against the main reason many members requested it. 

It was asked for as a digital free area where Vinyl etc. could be discussed without opposing views from the members who prefer pure analogue. 

How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file.

PROFILE UPDATED 28-06-2020

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7 minutes ago, sandyk said:

Better still, you leave this Sub Forum as you are going against the main reason many members requested it. 

It was asked for as a digital free area where Vinyl etc. could be discussed without opposing views from the members who prefer pure analogue. 

 

This only makes sense if Class D amplifiers are indeed digital.

 

Did you watch the video created by Paul McGowan from PS Audio? He makes a pretty compelling case that Class D amplifiers aren't digital.

Everything matters... when brewing coffee.

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35 minutes ago, kumakuma said:

 

This only makes sense if you can prove that Class D amplifiers are indeed digital.

Tom

Please stop trying to  turn this area into that which was not originally asked for by many members over the years.

 It is far too divisive , and may result in PMs sent that would almost certainly result in the banning of their senders if they were reported .

 This has already happened in this Sub Forum, but you may already be aware of this ?

 

Alex

How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file.

PROFILE UPDATED 28-06-2020

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8 minutes ago, kumakuma said:

 

Please leave if you have nothing of value to share and, if you've got a problem with this thread, take it up directly with Chris.

Discussions like this are best held in the Objective area of the forum  .

How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file.

PROFILE UPDATED 28-06-2020

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I liked the “secret” in the in Paul’s video.

Now that even Chris has become a class D owner, I look forward to what I has to say how that little amp he got performs upstairs.

 

In Bruno Putzeys interview you can learn something about his design. He also reveal what class A amp that may be equal to class D in about 6:45. And I must say one is not a very expensive amplifier. The other is totally crazy price.

 

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9 hours ago, R1200CL said:

 

In Bruno Putzeys interview you can learn something about his design. He also reveal what class A amp that may be equal to class D in about 6:45. And I must say one is not a very expensive amplifier. The other is totally crazy price.

 

 

Hmmm ...

 

Two measurements of distortion performance, at 1kHz into 8 ohms:

 

217B2150fig4.jpg

 

 image.png.62179452463fabddd9410b590479474e.png

  

Which amplifier should give you the better performance, looking at those two AP graphs, at normal, rather than extreme listening levels? 😉

 

Surprise, surprise ... the first is of that extreme cost amp mentioned by Putzeys; the second is of a DIY construction project of a 20W class A unit using normal topology, published in a hobbyist magazine in 2007 ... 😁.

 

 

 

Frank

 

http://artofaudioconjuring.blogspot.com/

 

 

Over and out.

.

 

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2 hours ago, fas42 said:

Which amplifier should give you the better performance, looking at those two AP graphs, at normal, rather than extreme listening levels? 😉

 

Surprise, surprise ... the first is of that extreme cost amp mentioned by Putzeys; the second is of a DIY construction project of a 20W class A unit using normal topology, published in a hobbyist magazine in 2007 ... 😁.

 And that was using components that weren't selected for matching., where even better results were achievable.

 A little more work in the PSU area, as well as close matching of the differential input pair further improved it audibly 

Their ULD series of Class AB amplifiers would easily outperform that one too.

How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file.

PROFILE UPDATED 28-06-2020

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