Home | Audio Reviews | Audio Show Reports | Partner Magazines | News     

Enjoy the Music.com

audioXpress Magazine

audioXpress Magazine      April 2021

 

audioXpress Magazine April 2021

 

  audioXpress remains the authority on audio and reproduced sound by connecting manufacturers and distributors with developers, buyers and consultants around the globe! It's readers are the audio product designers, consultants, integrators, DIY enthusiasts, opinion leaders and your best customers. All of them agree that the coverage of trending topics, unique in the audio industry, make audioXpress a must read.

Every month, audioXpress combines the best educational articles on topic such audio electronics, speaker and headphone design, amplifiers (from tube to Class D), acoustics, practical test and measurement, audio engineering praxis, and standards. audioXpress provides inside stories on new audio developments, on R&D Stories, the most complete objective reviews of innovative products and software, and selects some of the best DIY audio projects from worldwide experts.

 

 

Comment
4 This Issue's Editorial
From The Editor's Desk: Enhanced Audio Quality Frontiers
To design audio products, countless professionals are involved.
Editorial By J. Martins

 

5 Client Index

 

Features
48 Measuring Vibration with
Piezoelectric Sensors (Part 1)
The Research
By George Ntanavaras
Several years ago, George Ntanavaras designed a
system consisting of the ACH-01 accelerometer and an
amplifier with an integrated analog signal processor.
Over the years, he has been looking for other possible
solutions concerning the vibration measurements. In
this article, he describes his research for the design,
the construction of such a system, and presents the
results and the measurements.

 

56 The Science and Physics of High-
End Mic-Preamp Design (Part 3)
Considering the IC Options
By Mike Meechan
In the previous two articles, Mike Meechan discussed
the fundamental physics that play a part in
microphone preamplifier design, and briefly explored
its inhabitance in the practical world and how a good
design can retain the fidelity of the mic signal along
its path from transducer to output. At this stage,
he considers constructing some of the theoretically perfect
building blocks of an active mic preamp.

 

62 The Best of Two Worlds
An Old-Fashioned Tube Amp and Multilevel Class-D
Hybrid DIY Bass Guitar Amplifier Project
By Jens Tybo Jensen
This article describes the practical and basic
electrical design of a DC or battery-powered, 60W,
professionally featured and ultra-efficient bass
instrument amplifier. It is modelled after a classic
vacuum-tube bass amplifier topology, while utilizing
the exceptional audio quality and best in class
efficiency of the Infineon MERUS amplifier technology
to amplify every nuance of a genuine vacuum-tube
preamplifier.

 

audioXpress Magazine April 2021

 

Columns
Sound Control
38 One Traditional Way to Increase
Loudspeaker Directionality
By Richard Honeycutt

 

Audio Scope
44 Improving the Input Noise Model for a
High Output Current Dual Headphone Driver
By Michael Steffes

 

Market Update — True Wireless Earbuds
22 True Wireless Earbuds Evolving Toward Hearables
By J. Martins
There's a lot happening in the true wireless stereo (TWS) category
and this market update article intends to provide a quick overview
of the state-of the-art technologies and platforms in the space,
as well as some reference approaches in product design.

 

30 The Evolution of True Wireless Stereo
By Jean-Marc Luneau
In this article, we will look at some meaningful new features and
improvements that can help True Wireless Stereo (TWS) earbud
brands differentiate their products and make them stand out in today's crowded market.

 

 

 

Subscribe To audioXpress Magazine

Subscribe To audioXpress Magazine
Click here to subscribe to audioXpress magazine.

 

 

 

Previous Issues

2021
January   February   March   April

 

2020
July   August   September   October   November   December

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

     
 

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
Pacific Audio Fest 2023 Report
T.H.E. Show 2023 Report
HIGH END Munich 2023
Australian Hi-Fi Show 2023 Report
AXPONA 2023 Show Report
Salon Audio Montréal Audiofest 2023
CanJam Singapore 2023 Report
Florida Intl. Audio Expo 2023
Capital Audiofest Show 2022
KL International AV Show 2022
Toronto Audiofest Show 2022
CanJam SoCal 2022 Show Report
...More Show Reports

 

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
Sound Practices
The Absolute Sound
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 - 2023  HighEndAudio.com and Enjoy the Music.com®
May not be copied or reproduced without permission.  All rights reserved.