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Hypex NCx500 Class D Amplifier Review

Rate this amplifier:

  • 1. Poor (headless panther)

    Votes: 3 0.6%
  • 2. Not terrible (postman panther)

    Votes: 7 1.4%
  • 3. Fine (happy panther)

    Votes: 58 11.7%
  • 4. Great (golfing panther)

    Votes: 426 86.2%

  • Total voters
    494
Let's not go through it again.

 
Only for you. Who is "we." I'm always free to elaborate, I just don't want to spend the time.
Nor do I. We're in agreement!
 
Except that class D mostly isn't digital...
Except that it mostly is. Operating most of the POWER the Transistors PWM in switch mode in the final Analog section makes it more true than not.
 
Except that it mostly is. Operating most of the POWER the Transistors PWM in switch mode in the final Analog section makes it more true than not.
The guys who design that sort of thing (like me) are analog engineers. There's nothing there that a digital engineer deals with.
 
You liked the Hypex more than the Purifi? Notice a difference?
I don't think I could without Amir's tools. (even with the abx box). Its and extra Zero in the 0,00000Something down below and only a 0.97 db difference in power output.
 
The mostly Digital part is what makes the Analog good.
There is no digital part in most class D amps. They are analog PWM/PDM devices.
 
The guys who design that sort of thing (like me) are analog engineers. There's nothing there that a digital engineer deals with.
"Nothing" to do with Titles. After working with Dr. Carver Mead 22 years ago, I'm convinced ALL Digital is Analog. We just define voltage swings and thresholds with signal integrity as boolean algebra and code. Specific disciplines always apply. Fundamentally, we argue over semantics.
 
It's a recurring internet myth that class D is somehow digital. Maybe the D suggests that?
 
Except that it mostly is. Operating most of the POWER the Transistors PWM in switch mode in the final Analog section makes it more true than not.
Switching is not the same as digital. The french have a great word fore digital - "numerique" - that tells us that it is about encoding the signal as numbers. The english word "digital" goes through one more abstraction - it comes from "digits", as in counting on fingers. The idea is still the same - encoding the signal as numbers (usually binary codes).
 
"Nothing" to do with Titles. After working with Dr. Carver Mead 22 years ago, I'm convinced ALL Digital is Analog. We just define voltage swings and thresholds with signal integrity as boolean algebra and code. Specific disciplines always apply. Fundamentally, we argue over semantics.
All digital is analog at the electrical implementation level, but not all analog is digital.
 
"Nothing" to do with Titles. After working with Dr. Carver Mead 22 years ago, I'm convinced ALL Digital is Analog. We just define voltage swings and thresholds with signal integrity as boolean algebra and code. Specific disciplines always apply. Fundamentally, we argue over semantics.
Semantics aside, a digital engineer assumes his signals are quantitized to 1 or 0.
 
There is no digital part in most class D amps. They are analog PWM/PDM devices.
Operating a MosFET transistor as a switch, with low Rds On with an appropriate Toroid choke on the ass end, to turn it Analog again, is still more semantics arguments. The voltage swing notwithstanding the principle operation as a Switch. None of us are totally wrong. Capacitors excluded.
 
Operating a MosFET transistor as a switch, with low Rds On with an appropriate Toroid choke on the ass end, to turn it Analog again, is still more semantics arguments. The voltage swing notwithstanding the principle operation as a Switch.
Right. Like a switching power supply. Try getting a digital engineer to design one.
 

digital-vs-analog.png
 
It's a recurring internet myth that class D is somehow digital. Maybe the D suggests that?
Crown avoided the dreaded "D" with an "H" instead in the K1 and K2 amps. Clever marketing people are always there to protect us. LOL
 
Digital has all those step. And digital glare.
 
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