audioXpress 2020 Back Issues on CD

audioXpress 2020 Back Issues

January 2020
FROM THE EDITOR’S DESK—The Importance of Speakers and Sound, by J. Martins, p. 4
2019 COMSOL Conference Boston: One Workflow to Rule Them All, by David Logvin, p. 8
MARKET UPDATE—Speakers and Transducers: Big Promises in Large and Small Parameters, by J. Martins, p. 18
AUDIO SCOPE—Measuring Amplifier Harmonic Distortion Below -140 dBc, by Michael Steffes, p. 32
Cambridge Audio Edge W Power Amplifier: Amplification to Live With, by Oliver A. Masciarotte and Stuart Yaniger, p. 34
Practical Testing of Voice-Controlled Audio Devices, by Steve F. Temme, p. 44
A Class D HAT for Raspberry Pi, by Jens Tybo Jensen, p. 56
An Essential Piece of Equipment for the Audio Enthusiast: Heavy-Duty Dumby Load, by Bruce Brown, p. 59
HOLLOW-STATE ELECTRONICS—Repairing the Oldies, by Richard Honeycutt, p. 62

February 2020
FROM THE EDITOR’S DESK—The International Year of Sound, by J. Martins, p. 4
A Look Inside Sensory Evaluation of Sound, Review by Richard Honeycutt, p. 8
Exploring High-Quality Horn Loudspeaker Systems, Review by Mike Klasco, p. 12
MARKET UPDATE—Microphones: New and Exciting Microphones, by J. Martins, p. 16
SOUND CONTROL—Positioning Choir Microphones, by Richard Honeycutt, p. 34
A Groundbreaking Approach to Gain Control that Cuts Conference Call Annoyance, by Erica Yorga and Rich Ferguson, p. 30
AUDIO SCOPE—Interfacing Measurement Mics to Delta-Sigma ADCs: Nuances Applying FDAs, by Michael Steffes, p. 40
Vanatoo Transparent One Encore, by Stuart Yaniger, p. 44
QUESTIONS & ANSWERS—DIY Expert Enjoys the Challenges of Speaker Design, by Shannon Becker, p. 52
Powering Your Circuits (Part 1): Battery Power, by Ed Simon, p. 56
HOLLOW-STATE ELECTRONICS—Effect of Load Impedance on the Output of Hollow-State Power Amplifiers, by Richard Honeycutt, p. 60

March 2020
FROM THE EDITOR’S DESK—Wanted! Affordable Lab-Grade Audio Measurements, by J. Martins, p. 4
MARKET UPDATE—Test & Measurement:Finding the Right Solution, by J. Martins, p. 8
Dayton Audio Test System (DATS) V3: Rise of the Ultra-Portable Woofer Tester, by David Logvin, p. 20
Strategies for Optimizing Audio Production Tests, by Dan Knighten, p. 28
SOUND CONTROL—Miking Choirs with Orchestras or Organ, by Richard Honeycutt, p. 34
AUDIO SCOPE—FDA Errors to Consider Driving Audio ADCs and Active Filter Design Options, by Michael Steffes, p. 38
Audeze Mobius Headphones Reviewed: Almost Essential, Almost Wonderful, by Luke McCready, p. 42
Powering Your Circuits (Part 2):AC Power Supplies, by Ed Simon, p. 56

April 2020
FROM THE EDITOR’S DESK—State of the Headphones Industry, by J. Martins, p. 4
MARKET UPDATE—Headphones to Hearables: Actively Enhancing our Hearing, by J. Martins and Mike Klasco, p. 8
MARKET UPDATE—Voice: Tackling Voice Capture and Processing Technologies, by J. Martins, p. 22
Objective Listening Effort Evaluation, by Hans W. Gierlich and Jan Reimes, p. 32
AUDIO SCOPE—Loop Gain and Phase Margin Considerations in Applying Fully Differential Amplifiers to Active Filters, by Michael Steffes, p. 44
Sound Cards for Data Acquisition in Audio: The Linear Audio Autoranger Mk II, by Stuart Yaniger, p. 48
Powering Your Circuits (Part 3): AC Power Rectification and Smoothing, by Ed Simon, p. 56
HOLLOW-STATE ELECTRONICS—Triode Power Amplifiers, by Richard Honeycutt, p. 60

May 2020
FROM THE EDITOR’S DESK—The Positivity of Tubes, by J. Martins, p. 4
RødeTest FuzzMeasure Audio and Acoustic Measurement Software: A Classy “Swiss Army Knife” for Acoustic Measuring, by Luke McCready, p. 8
Stop Worrying About Coupling Capacitors, by Ethan Winer, p. 20
AUDIO SCOPE—Noise Analysis for FDA-Based Audio ADC Drivers, by Michael Steffes, p. 30
Build This MoFo!, by Mike Rothacher, p. 34
In Memoriam of Gerhard Haas, p. 42
Repurposing an Old Preamp for Line-Level Duty, by Bill Reeve, p. 44
Mini Blocks—Small Vacuum Tube Power Amplifiers: An Evolutionary Project Spanning 11 Years, by Bruce Heran, p. 50
Powering Your Circuits (Part 4): AC Rectification and DC Power Regulation, by Ed Simon, p. 56
HOLLOW-STATE ELECTRONICS—Adventures in Guitar Amplifier Repair, by Richard Honeycutt, p. 60

June 2020
FROM THE EDITOR’S DESK—Reshaping Automotive Audio, by J. Martins, p. 4
Sennheiser AMBEO Immersive Soundbar: Raising the Bar, by Oliver A. Masciarotte, p. 8
A Review of Hi-Fi: The History of High-End Audio Design, Review by Mark Driedger, p. 18
A Continuous Calibration Method to Optimize Conference Call Acoustic Echo Canceller Performance in Real Time, by Erica Yorga, p. 20
SOUND CONTROL—More on Restaurant Noise, by Richard Honeycutt, p. 26
AUDIO SCOPE—Hidden Low-Frequency Noise Contributors Applying FDAs to Audio Digitizer Channels, by Michael Steffes, p. 32
MARKET UPDATE—Moving Audio Landscape, by J. Martins and Mike Klasco, p. 38
Our Future Car: Audio Bubbles, Sterile Cockpits, New Business Models, by Elia Shenberger, p. 50
Powering Your Circuits (Part 5): Mains Noise Filtering, by Ed Simon, p. 56
HOLLOW-STATE ELECTRONICS—Compactrons, by Richard Honeycutt, p. 62

July 2020
FROM THE EDITOR’S DESK—Time to Embrace Evolution, by J. Martins, p. 4
MARKET UPDATE—Class-D Products Getting Smarter, by J. Martins, p. 8
A Look Inside The Last Seat in the House—The Story of Hanley Sound, by Richard Honeycutt, p. 16
A Tale of Two Class-D Amplifiers: Orchard Audio BOSC and Purifi Audio Eigentakt EVAL1, by Stuart Yaniger, p. 18
A Visit to Purifi Audio: Where the Magic Happens, by Ward Maas, p. 28
SOUND CONTROL—Designing Speaker Systems for Live Sound, by Richard Honeycutt, p. 34
AUDIO SCOPE—Low Frequency and Popcorn Noise in High-Speed Amplifiers, by Michael Steffes, p. 40
Build a Fully Balanced Transconductance Preamplifier, by Dimitri Danyuk, p. 44
Hunting the Elusive Transient, by Roger Russell, p. 50
Powering Your Circuits (Part 6): Power Transformer Rating, Selection, Fusing, and Safety, by Ed Simon, p. 56
HOLLOW-STATE ELECTRONICS—The Development of Hollow-State Live Sound Amplifiers, by Richard Honeycutt, p. 60

August 2020
FROM THE EDITOR’S DESK—Evolution Acoustics, by J. Martins, p. 4
Taking a Listen to Sound Liaison’s DXD Music Sampler, by Gary Galo, p. 8
NAD M10 Masters Series Streaming Amplifier, by Stuart Yaniger, p. 16
SOUND CONTROL—Testing Acoustical Systems, by Richard Honeycutt, p. 28
Acoustic Solutions Round-Up 2020: From Acoustic Comfort to Productivity, by J. Martins, p. 32
The Elephant in the Lab, by Jim DeGrandis, p. 42
The Internal Life of Vacuum Tubes, by Jan Didden, p. 46
The APR-17 Aperiodic Loudspeaker (Part 1): Starting the Build, by George Ntanavaras, p. 54
HOLLOW-STATE ELECTRONICS—The Early Development of Hollow-State Mixers, by Richard Honeycutt, p. 62

September 2020
FROM THE EDITOR’S DESK—‘Cause Everything Changes, by J. Martins, p. 4
The Magnepan LRS: Back to the Future, by Oliver A. Masciarotte and Kent Peterson, p. 8
SOUND CONTROL—From Acoustics to Electroacoustics: The Roots of Early Live-Sound Speakers, by Richard Honeycutt, p. 16
AUDIO SCOPE—How Do We Generate Measured Noise Plots for Op-Amps?, by Michael Steffes, p. 22
Altec Lansing’s Voice of the Theatre Speakers: What You Need to Know, by Scott Dorsey, p. 26
Loudspeaker Measurements at Home: A Guide for Building Your Own Test Chamber, by Geoff Hill, p. 32
Fast and Reliable End-of-Line Acoustic Defect Detection, by Stefan Irrgang and Wolfgang Klippel, p. 38
How Virtual Product Development Improves the Quality of Consumer and Pro Audio Products, by Alfred Svobodnik and Thomas Gmeiner, p. 44
The APR-17 Aperiodic Loudspeaker (Part 2): Measurements and Final Details, by George Ntanavaras, p. 50
The RSX: A Large, Modern DIY Speaker, by Chris Biese, p. 58

October 2020
FROM THE EDITOR’S DESK—Spending Time Online, by J. Martins, p. 4
MARKET UPDATE—Evolving Residential Installation: Home Entertainment and Workspaces, by J. Martins, p. 8
SOUND CONTROL—Testing Electroacoustical Systems, by Richard Honeycutt, p. 20
AUDIO SCOPE—Extracting Input Referred Op-Amp Noise Models, by Michael Steffes, p. 24
GeerFab Audio D.BOB Digital Breakout Box, by Gary Galo, p. 28
Dealing with Communication Challenges, by J. Martins, p. 34
Enabling High-Quality Voice Conferencing, by Manfred Lutzky, p. 40
Getting Started with Automotive Audio Bus (Part 1): It’s Not Just for Autos, by Brewster LaMacchia, p. 44
High-End Class-D Audio Board for Arduino MKR Family, by Jens Tybo Jensen, p. 50
Coffee & Bluetooth Speakers: Desktop Speaker System Using Recycled Coffee Cans, by Ken Bird, p. 54
Ultra-Low Distortion Microphone Buffer Amplifier (Part 1): Construction, by Michel Nieuwenhuizen, p. 58
HOLLOW-STATE ELECTRONICS—Design Considerations for a Hollow-State Mixer, by Richard Honeycutt, p. 64

December 2020
FROM THE EDITOR’S DESK—For Future Memory, by J. Martins, p. 4
Remembering Jeff Bagby, by Ben Shaffer, p. 8
SOUND CONTROL—Acoustical Design of a Multi-Purpose Room, by Richard Honeycutt, p. 16
AUDIO SCOPE—Simple Improvements to Legacy Differential Transimpedance to Single-Ended Audio DAC Output Designs, by Michael Steffes, p. 22
QuantAsylum QA401/QA451: Redefining the Compact and Modular Audio Measurement System, by David Logvin, p. 26
Mastering Wireless Multi-Tone Testing, by Andrew Taylor, p. 34
The Puffin Phono DSP by Parks Audio, by Mike Harkins, p. 38
Build a Passive Moving-Coil Step-Up Device, by Gary Galo, p. 48
Getting Started with Automotive Audio Bus (Part 3): Designing in A2B, by Brewster LaMacchia,
p. 54
HOLLOW-STATE ELECTRONICS—Circuit Designs for a Hollow-State Mixer, by Richard Honeycutt, p. 59
ARTICLE UPDATE—Comparing IMD (and THD) Measurements, p. 64
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