In this issue

8 Soviet Germanium Transistors
By Scott Dorsey
This article encourages DIYers to make use of the large quantities of these transistors now available on the surplus market as replacement parts or for building projects from old design handbooks.

38 Linear Tube Audio’s ZOTL Ultralinear Power Amplifier
By Oliver Masciarotte and Stuart Yaniger
This month two of our esteemed authors joined forces to review the ZOTL Ultralinear Power Amplifier from Linear Tube Audio (LTA), based on David Berning’s (zero) output transformerless designs and patent.

48 Reflective-Way, Two-Way System - Part 2
System Construction and Listening Tests
By Peter Lehmann
In the second part of this article, Peter Lehmann constructs his loudspeaker system with an integrated reflector for the tweeter and puts it through several listening tests.

56 Measurements Rate New SMT
Low-Voltage JFETs Under Consistent Conditions
An Update Using Modern JFETs
By Dimitri Danyuk

18 Voice Capture and Recoginition
By J. Martins
In this Market Update, audioXpress explores some of the latest developments in voice technologies and selected a few companies that are at the forefront of voice development platforms with articles contributed by several industry experts.

28 Voice Assistants
The Essential Next-Generation Consumer Interface
By Simon Bryant

31 Turning Up the Innovation on Smart Speaker Designs
By Benwei Xin and Wenchau Albert Lo

33 Voice Capture Challenges
The Threshold of the Golden Age
of Voice
By Mike Klasco

60 A Bogen APH-1050
Turned Guitar Amp
By Richard Honeycutt

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.