audioXpress March 2025 PDF

Issue 3
March 2025

FROM THE EDITOR’S DESK—How Things Measure, by J. Martins, p. 4
Audio THD with QSPICE: An Interview with Mike Engelhardt, by Tim McCune, p. 8
The Analog Engineer Calculator and the Analog Engineer’s Pocket Reference, by Jan Didden, p. 14
Measuring HDMI Audio, by Steve Temme, p. 20
Testing Power Amplifiers, by Adam Liberman, p. 26
SOUND CONTROL—The Early Days of Speaker Acoustics, by Richard Honeycutt, p. 32
The SL-100 Sound Level Adjuster, by George Ntanavaras, p. 38
Reinforced Speaker Protection, by Thomas Perazella, p. 46Zoran M. Dukic’s High End Tube Amplifers Designer Tool Box, by Jan Didden, p. 56
A New Op-Amp for Phono Preamps: Part 2—Development and Measurements, by Brian Lowe, p. 60

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