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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

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