Increase the Gain! audioXpress July 2020 Focuses on Audio Amplifiers

audioXpress July 2020 is now available, and there's a quiet revolution happening in audio amplification. Essentially it is the direct result of strong innovation in Class-D technology, with incremental improvements introduced on multiple fronts. In this month's Market Update, J. Martins details a few of the "Class-D Products Getting Smarter" and then Stuart Yaniger discusses Class-D amplifiers from two of those companies: Purifi Audio and Orchard Audio. Also, Ward Maas details his visit to Purifi Audio. Dimitri Danyuk shares his "Fully Balanced Transconductance Preamplifier" project, Roger Russell is "Hunting the Elusive Transient," and Ed Simon concludes his "Powering Your Circuits" series. And there's much more valuable content in this edition. Download or view your issue online now.

audioXpress June 2020 is now available, and for the first time in the publication's history, we have explored the fascinating world of automotive audio technology, and the relevant trends and opportunities. Elia Shenberger (CEVA) writes about Our Future Car and Birgit Bartel-Kurz (Fraunhofer IIS) discusses how to offer surround sound in cars. And Oliver Masciarotte reviews the Sennheiser AMBEO Immersive Soundbar, while Erica Yorga (Nureva) details a Real-Time Calibration Method for Acoustic Echo Cancellation. And there's so much more in this edition. Download or view your issue online now.

audioXpress May 2020 Glass Audio/Tube Focus edition is now available. Highlighted on the cover is a review of the RødeTest FuzzMeasure Audio and Acoustic Measurement Software and Ethan Winer's experiments to measure capacitor distortion. For tube enthusiasts, Bill Reeve repurposes an old Shure preamp for line-level duty, and Bruce Heran details how he built his two Mini Blocks tube amplifiers. Mike Rothacher shares an inexpensive MOSFET Follower (MoFo) Class A amplifier project, Richard Honeycutt provides valuable lessons about repairing guitar amplifiers, and there's plenty more audio electronics focused articles. Download now!

The April 2020 edition of audioXpress is now available and features two essential Market Updates, one focusing on the industry transition to active headphone and earphone designs, and another on how to leverage the latest voice capture and processing technologies. The issue also explains how to evaluate listening effort, and Stuart Yaniger puts the Linear Audio Autoranger Mk II Interface to the test, while Ed Simon writes about AC Power Rectification. Another issue to read and use as reference.

Sensory evaluation is a field of study that bridges physical measurement and human perception, helping us to improve product design and aural environments. Richard Honeycutt reviews this extended work, which was edited by Nick Zacharov, exploring the latest sensory evaluation techniques, specifically applied to the evaluation of sound and audio. This article was originally published in audioXpress, February 2020.

audioXpress March 2020 focuses on Audio Test & Measurement. In this edition, learn how to find the right Test & Measurement solution, learn more about how to optimize audio production tests, and read the review of the new Dayton Audio DATS V3 Test System. Luke McCready also reviews the fantastic Audeze Mobius planar magnetic, wireless headphones. There's plenty more to read and learn about in our regular columns Sound Control and Audio Scope, plus a new article from Ed Simon on Powering Audio Circuits.

The February 2020 edition of audioXpress features a Market Update on Microphones, addressing the latest technology and application trends in this expanding product segment, including an article explaining how Nureva created a groundbreaking approach to gain control that cuts conference call annoyance. And Richard Honeycutt explains how to choose and position Choir Microphones, while Michael Steffes discusses interfacing measurement mics to Delta-Sigma ADCs. Get the new edition now!

audioXpress January 2020 is now available in print and download! To start 2020 in the best possible way, this edition includes a Market Update about Speakers and Transducers, followed by a report of the COMSOL Boston Conference where the latest Multiphysics 5.5 Release was unveiled, a great review of the Cambridge Audio Edge W amplifier, and an in-depth article in which Steve Temme discusses tools and techniques to accurately measure voice-controlled and connected devices. Plus many more great theory articles and practical knowledge shared by audioXpress experts.

audioXpress December 2019 dives into the latest wireless audio and DSP platforms and solutions in a dedicated Market Update, followed by a review of the latest Audio Precision APx555 B Series audio analyzer. David Logvin shares his experience with the xCORE VocalFusion development platform by XMOS, while Michael Steffes re-confirms a theory that cascaded amplifier + ADC harmonic distortion combine as voltage swings. Christopher Paul explores alternative approaches to the design of a linear current regulator for audio tube amplifiers, Menno van der Veen details an 18 W single-ended valve amplifier using Trans technology, and Richard Honeycutt investigates whether or not swapping out comparable tubes makes any audible difference in a guitar amplifier’s sound. Download your own copy now!

The November 2019 edition of audioXpress is now available with a wide range of technical topics in audio electronics and design. We review the Benchmark LA4 Line Amplifier and the new Hooke Verse Bluetooth Binaural Recording Headphones. Jan Didden proposes an updated version of his High-Voltage Delay for Tube Amplifiers, and Thomas Zarbo, Jr. explains how to build his Tenacious Bass-8 Powered Subwoofer. And, learn more about Data-Over-Sound, MU amplification topologies, and Auverdion’s Aurora open-source DSP platform. Now available!