audioXpress Magazine December 2025

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	High-Performance Audio Reviews Music News, Show Reports, And More! Celebrating 30 Years Of Service To Music Lovers

audioXpress Magazine December 2025

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.

We Don't Want You To Miss Out
We have initiatives to reinforce the magazine's access globally.
Editorial By J. Martins
And just like that, our last issue of 2025 was sent to the printers —yes, we are still doing print and we have decided to keep doing it until we find a better way to serve the same readers who are gladly paying to read this publication in paper. We don't want anyone to miss out. Our increased focus on audio product development and design has been recognized as a unique, valuable resource, serving a wider audience than ever—evenly spread globally. The only thing we can do is make it easy for our readers to get access and read the way they like. Not even the largest media organizations have found the "magical" formula to make magazines available in other ways. Magazines, with their thoughtful layout, carefully reviewed content, and attractive graphical design, are still the highest form of periodical publications, offering the most consistent form of disseminating knowledge. When the Apple iPad was introduced in 2010, Steve Jobs emphasized both its immersive, visually rich display and its transformative potential for digital publishing. While the role of tablets for that specific purpose was never consolidated, it helped promote web-based digital publishing platforms.
---> We Don't Want You To Miss Out.

5 Supporting Companies

Wireless Audio
Market Update
8 Breaking Boundaries In Wireless Audio
By J. Martins
Bluetooth, Ultra Wideband (UWB), Wi-Fi, Micro Power
Wi-Fi, ultra-low latency protocols, AirPlay, SKAA, and
more—wireless technologies are a fundamental part
of today's audio ecosystem, improving and expanding
quickly. No matter what the application, wireless is
always a part of it. And high-end quality without the
wires is becoming a reality.

20 Bluetooth LE Audio In The Real World
By Christoph Apel
This article describes how StreamUnlimited addresses
Bluetooth LE Audio development in new and
innovative ways, enabling transformative wireless
audio experiences.

26 Enhancing Critical Communications
AI Voice Processing In Two-Way Radios
By Aleksandr Timofeev
Modern Artificial Intelligence and neuromorphic
processing can address problems in hands-free radio
communication. Polyn Technology has created an
always-on, speaker-specific voice activation solution for
hands-free control with improved speech intelligibility
and noise rejection even on legacy radios.

32 A Guide For Developers
Developing And Testing Bluetooth
LE Audio Performance
Part 1—Typical Audio Measurements
By Brewster LaMacchia
To make Auracast and LE Audio more accessible to
developers and product teams, this article delves
into the typical audio measurements that need to be
considered for Bluetooth LE Audio devices and how
they inform the analysis of actual hardware.

Columns
Sound Control
38 Distributed Mode Loudspeaker Technology And "Invisible Speakers"
By Richard Honeycutt
Learn more about Distributed Mode Loudspeakers (DMLs),
found in many home audio and architectural installations,
and how they can become totally invisible when intended.

Features
44 Cleer ARC 3 Open Wireless Earbuds With Noise Cancelling
By Brent Butterworth
A new version of Cleer's ARC 3 earbuds is among the first
open-ear designs to include noise cancelling. Brent Butterworth
explores if it's a good idea to block some noise but not other
noise, and to what degree it's even possible when the earbud's
not sealed in the ear canal.

50 Total Dynamic Distortion
A Better Way to Measure And Understand Sound Quality
In MEMS Microspeakers
By Robb Zimmerman
While continuous sine waves are easy to measure, transducers
can be excited by dynamic signals and measured in the time
domain without settling time to gain more insight into their accuracy
with musical signals. Unique features that cannot be easily extracted
from impulse response and cumulative spectral decay (CSD)
visualizations are effortlessly quantified with Total Dynamic
Distortion analysis.

58 Danville Signal dspNexus 2/8 Part 2—Listening Experiences
By Thomas Perazella
In Part 2, Thomas Perazella discusses his extended listening
experience with the dspNexus processor, including the key
performance characteristics that are important to him. He
lists several examples of music tracks and mentions different
DAC options.

62 Why DIY When You Can Buy?
By Perry Marshall
Perry Marshall explains the appeal of DIY to the uninitiated
who have never designed and built their own equipment. He
cites the creativity and originality of attempting such a
project as well as the opportunity to deeply understand the
craft down to its foundations.

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