In this issue

FROM THE EDITOR'S DESK—Evolution Acoustics, by J. Martins, p. 4
Taking a Listen to Sound Liaison’s DXD Music Sampler, by Gary Galo, p. 8
NAD M10 Masters Series Streaming Amplifier, by Stuart Yaniger, p. 16
SOUND CONTROL—Testing Acoustical Systems, by Richard Honeycutt, p. 28
Acoustic Solutions Round-Up 2020: From Acoustic Comfort to Productivity,
by J. Martins, p. 32
The Elephant in the Lab, by Jim DeGrandis, p. 42
The Internal Life of Vacuum Tubes, by Jan Didden, p. 46
The APR-17 Aperiodic Loudspeaker (Part 1): Starting the Build,
by George Ntanavaras, p. 54
HOLLOW-STATE ELECTRONICS—The Early Development of Hollow-State Mixers,
by Richard Honeycutt, p. 62

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