audioXpress - December 2018

I dette nummeret

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