Hearables, Headphones Testing, Audio Electronics, and More in audioXpress April 2023

Want to understand what's ahead in the most revolutionary audio product category of the 21st century? Read the State of the Hearables Industry Market Update. And for product developers and manufacturers, there's also a Headphones Test and Measurement report. Burkhard Vogel discusses op-amp noise in simulated models, Bruce E. Gillingham offers a complete monoblock power amplifier project, and René Christensen writes about acoustic topology optimization. And so much more....

Great articles, practical projects, reviews, and audio technology previews start the year in full force! That's what our readers will find in audioXpress January 2022, starting with an update on new materials and engineering approaches for loudspeakers, and articles by Charlie Hughes, Scott Dorsey, Frans de Wit, Ken Bird and Mike Harkins. Brent Butterworth reviews the Olive Pro earbuds, while Raj Senguttuvan from Knowles discusses differentiation for True Wireless Stereo (TWS) design and development.

audioXpress September 2021 celebrates its Speaker Builder magazine origins, once again offering an expanded focus on loudspeaker building, design, and testing. Mike Klasco provides an update on Speaker Technology, Claus Futtrup and Jeff Candy discuss Parameter Estimation and Box Simulation with Speakerbench, and Geoff Hill tells us the Tetrahedral Test Chamber Story. In this edition we pay tribute to Roger Russell (1935-2021) and we feature two great DIY projects. Now available online and in print.

DIY audio pioneer and author David B. Weems passed away on April 4, 2021 at his Newtonia Missouri home after a short illness. Mr. Weems is known to many in the speaker design and building community for his prolific authorship of DIY books, and articles for such publications as Audio, Popular Electronics, Radio Electronics, Audio Amateur, Speaker Builder, and AudioXpress.

For this review, Ken Bird details his experience in building a set of speakers from Swans Speakers Kits, part of a new catalog created by HiVi Acoustics and Swan Speakers (HiVi's consumer brand), and that so far includes two kits: a two-way bookshelf design, the DIY 2.2A, and the slightly larger three-way design, the DIY 3.1A, the model sent to audioXpress. Both models incorporate HiVi drivers. This article was originally published in audioXpress, August 2019.

The August 2019 edition of audioXpress features the latest Acoustical Solutions product round-up, and several contributed articles on acoustic-related topics, including, evaluating auditorium acoustics, measuring unwanted vibrations, and frequency timing. This edition also includes Stuart Yaniger's review of the Kali Audio LP-6 Powered Studio Monitors, Ken Bird's assembly-review of the Swans Speakers DIY Kits, and Oliver A. Masciarotte's report from AXPONA 2019. Now available for download and in print!

audioXpress April 2019 features a closer look at two hot application areas in audio, with an expanded Market Update about hearables and true wireless stereo, and an update on voice capture solutions. Also in this edition, Steve Temme (Listen, Inc.) addresses the challenges for testing the wider class of connected speakers, experts from Nokia Technologies explain how audio processing in smartphones can enable completely new features, and Luke McCready reviews the Qobuz hi-res music streaming service, now available in the US. Get your audioXpress now!

Our Speaker Focus edition offers a review of the two new SB Acoustics Speaker Kits, while Don Keele, Jr., reminds us of how things evolved, revisiting an EV 30W subwoofer project, and we interviewed Zoltán Bay, creator of the revolutionary Bay Radial Speaker! The September 2017 edition also features two great DIY projects: The Thinman Speaker by Ken Bird and a Hybrid Electrostatic Speaker with Tailored Dispersion by Charlie Mimbs.