Everything That's Audio in audioXpress December 2023

audioXpress December 2023 includes a market overview of multiroom audio, Brent Butterworth writes about new ways to measure ANC earbuds, and Stuart Yaniger measured the new Axign and GaN Systems Class-D audio amplifier board. Richard Honeycutt writes about tubes, BJTs, JFETs, MOSFETs, and ICs, and Dimitri Danyuk, discusses JFETs in audio circuits. Douglas Self explains how to optimize variable-frequency tone controls, and Jan Didden shares his eDD direct-drive amplifier project.

In this valuable review for product developers, Brent Butterworth shares what he learned about two evaluation solutions intended for designers of true wireless earbuds, the fastest growing product category in the audio industry. With this reference design and developer kit, Knowles made it easier for companies to add sophisticated true wireless earphones to their lines — whether they develop their own design or adopt one that’s ready to go. audioXpress tried out both options.

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.