Home | Audio Reviews | Audio Shows | Partner Mags | News  

 

Enjoy the Music.com

Hi-Fi World Magazine

October 2021

 

What Is Class D Amplification?
I've yet to be convinced that Class D sounds better.
Editorial By Noel Keywood

 

Hi-Fi World October 2021

 

  If you want a powerful amplifier in a small case, a Class D NCore amplifier from Hypex (Netherlands) has become a popular choice" I said last month. Reason being NCore has overcome all the problems of Class D, notably high frequency distortion, load sensitivity and D.C. on the loudspeaker terminals.

So I was a bit taken aback to encounter all these problems on Technics new SU-R1000 Reference not-Class D amplifier you can read about on p10. I have to call it that at their insistence, but that it's not Class D is a technicality: all the same issues arise. It is what is commonly termed an 'analogue switching amplifier'. These have been around for 20 years or more, without gaining popularity so a surprise that Technics should try again in unconvincing fashion.

Producing a 'digital amplifier' is an amusingly fruitless goal. No one can agree on what such a thing is in the first place, and with no definition just about anything goes. Ironically, a Class D amplifier is perhaps the last potential contender for the title even though there's a big D in its name. In purest form the pulse streams lack numeric value (although they can be given one). But DSD is the same and we think of it as "digital", so is a Class D amplifier digital? Possibly!

 

Hi-Fi World October 2021

 

There are other forms of 'digital amplifier', those with digital inputs that are converted to analogue by a DAC for example. Arguably more deserving are those that are totally digital internally, turning all analogue inputs to digital through an ADC. This approach is becoming more popular because all sorts of tricks can be coded in: filters, tone controls and gain adjusters all come to mind, including phono equalisation curves.

I've yet to be convinced that Class D sounds better even when done perfectly. Analogue Class A/Bs do a near-perfect job in any case, so hardly surprising. The real benefit of Class D or Class Z or whatever is economic and 'green-ness'. A small, lightweight amplifier that draws little mains power and costs peanuts. Like it or not, Class D makes an inarguable case and we will be hearing much more from it in future.

 

 

Noel Keywood
Editor, HiFi World

 

 

 


Subscribe!
Click here to subscribe to Hi-Fi World.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

     
 

Quick Links


Audiophile Review Magazine
High-End Audio Equipment Reviews

 

Equipment Review Archives
Turntables, Cartridges, Etc
Digital Source
Do It Yourself (DIY)
Preamplifiers
Amplifiers
Cables, Wires, Etc
Loudspeakers/ Monitors
Headphones, IEMs, Tweaks, Etc
Ultra High-End Audio Reviews

 

Videos
Enjoy the Music.TV

 

Columns
Editorials By Tom Lyle
Viewpoint By Roger Skoff
Viewpoint By Steven R. Rochlin
Various Think Pieces
Manufacturer Articles


Show Reports
Capital Audiofest 2021 Show
The HiFi Summit Q2 2021
T.H.E. Show 2021 Report
The HiFi Summit Q4 2020
The HiFi Summit Q2 2020
Bristol Hi-Fi Show Report 2020
Florida Audio Expo 2020 Show Report
New York Audio Show 2019 Report
Capital Audiofest 2019 Show Report
Rocky Mountain Audio Fest (RMAF) 2019
High End Munich 2019 Show Report
Click here for previous shows.

 

Other
Audiophile Contests
Cool Free Stuff For You
Tweaks For Your System
Vinyl Logos For LP Lovers
Lust Pages Visual Beauty

 

Resources & Information
Music Definitions
Hi-Fi Definitions

 


Daily Industry News

High-End Audio News & Information

 

Partner Print Magazines
audioXpress
Australian Hi-Fi Magazine
hi-fi+ Magazine
HIFICRITIC
HiFi Media
Hi-Fi World
Sound Practices
VALVE Magazine

 

For The Press & Industry
About Us
Press Releases
Official Site Graphics

 

Contests & Our Mailing List

Our free newsletter for monthly updates & enter our contests!

 

 

    

Home   |   Industry News   |   Equipment Reviews   |   Press Releases   |   About Us   |   Contact Us

 

All contents copyright  1995 - 2021  HighEndAudio.com and Enjoy the Music.com
May not be copied or reproduced without permission.  All rights reserved.