In this issue

8 Cutting-Edge Audio-No Wires, Room Optimized
In this Market Update, we examine wireless audio and digital processing technologies, with an overview of all the latest solutions and trends in these two critical but extremely exciting domains for audio product designs.
24 Keeping the Sound (or Noise) In or Out
28 Combining Cascaded Stage Harmonic Distortion
30 Audio Precision APx555 B Series Audio Analyzer
Audio Precision recently loaned us one of its newest analyzers, the APx555 B Series. Stuart Yaniger had one month to test it, and in this article he provides readers with a hint of the new expanded capabilities—both of the APx555 B Series hardware and the new APx500 5.0.1 software.
38 The xCORE VocalFusion -Speaker Linear Kit by XMOS
Learn more about the VocalFusion Speaker Linear Kit, designed for those who want to integrate voice user interfaces into consumer electronics typically found at the edge of the room, such as smart home control panels and washing machines.
46 Reggie-Phil 2.0: A Current-Regulated Filament Supply
Inspired by previous approaches published by audioXpress, this article explores alternative options to the design of a linear current regulator for audio tube amplifiers, including employing feedback to sense load and other design strategies.
54 Build an 18 W Single-Ended Valve Amplifier with Trans Technology
This article shows an easy-to-build 18 W single-ended valve amplifier using Trans technology with pentodes, current sources, and toroidal transformers. The amplifier was created by the author to support his TubeSociety students in the Netherlands.
60 Plug-In Modifications for Hollow-State Guitar Amplifiers?

audioXpress Magazine Description:

Step into the realm of audio, sound technology, and the latest developments in the field with audioXpress Magazine. We're delighted to introduce you to this publication, your ultimate source for all things related to audio, audio equipment, and the art of sound reproduction.

audioXpress Magazine, published by KCK Media Corp., is not just a magazine; it's your portal to the world of audio and sound technology.

As you explore the pages of audioXpress Magazine, you'll find a world of content that celebrates the magic of sound and audio technology:

* Audio Equipment: Dive into the world of audio gear, equipment reviews, and the latest advancements in the industry.
* Sound Technology: Explore the science of sound, audio engineering techniques, and the art of sound reproduction.
* DIY Audio: Learn about do-it-yourself audio projects, audio kits, and tips for crafting your own sound systems.
* Industry Insights: Stay informed about the latest trends, innovations, and news in the audio and sound technology field.
* Music and Sound: Immerse yourself in the world of music, audio production, and the stories of sound enthusiasts.


audioXpress Magazine is your essential resource for celebrating the magic of sound, understanding audio technology, and connecting with a community that values the science and art of sound. Subscribe now and become part of a community that appreciates the power of sound and music.