All items in category Magazine Articles
Book Review: The Bottle Builder - A Compendium of Tube Amplifier Designs
by Peter Delos

Book Review: The Bottle Builder - A Compendium of Tube Amplifier Designs

This review of The Bottle Builder, Volume 1: A Compendium of Tube Amplifier Designs discusses Johan Basse Bergqvist’s hands-on collection of his amplifier designs. A book illustrated with more than 400 figures and photographs to help readers understand audio—no engineering degree necessary. Published on audioXpress, July 2015.
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Digmoda DSP Amplifier Line
by Dean Rivera

Digmoda DSP Amplifier Line

Digmoda is a series of modular OEM platforms consisting of digital amplifiers, DSPs, and power supplies designed specifically for audio applications. The Digital Power (DP) line consists of two new software programmable amplifiers, the DPSW300 and DPSW1000, along with newly developed DSP software for these units.
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AES67-2013: The New Networked Audio-Over-IP (AoIP) Interoperability Standard
by Joao Martins

AES67-2013: The New Networked Audio-Over-IP (AoIP) Interoperability Standard

The AES X192 initiative - driven by the Audio Engineering Society (AES) task group SC-02-12-H - resulted in the new AES67-2013 standard, published on 11 September 2013, which defines key parameters for networked AoIP interoperability. This article from audioXpress' Standards Review column was published short after, in January 2014.
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Fresh From the Bench: Focal’s Spirit Professional
by Miguel Marques

Fresh From the Bench: Focal’s Spirit Professional

In 2013, French speaker manufacturer Focal released its first headphones. Among the models intended for the hi-fi and consumer markets, Focal also introduced the Focal Spirit Professional, a closed-back headphone design built for the professional musician or recording studio engineer. This is the review.
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Book Review: The Bruce Swedien Recording Method
by Joao Martins

Book Review: The Bruce Swedien Recording Method

With a career spanning 60 years, Bruce Swedien has recorded and mixed the biggest selling albums of all time. Swedien’s contribution to popular music is undeniable and his recordings have became a reference for generations of audio engineers. This book is a valuable compilation of different materials and reflects Swedien’s most recent activities, where he generously shares what he knows.
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Green Audio and Then Some
by Mike Klasco

Green Audio and Then Some

What are my two cents on criteria for sustainable product design? Bioplastics, sustainable, biodegradable, or end of life recyclable attributes are all aspects of a truly green product. I think that a conscionable green design philosophy focuses on the total integration of “good citizen” eco-friendly materials and processes and long, useful life.
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Diffraction Doesn’t Have to Be a Problem
by David Ralph

Diffraction Doesn’t Have to Be a Problem

This article shows an easy way to control baffle diffraction using a stepped baffle example. The author experiments with the use of felt, directly applied to the baffle and measures the results. Each piece of felt and its placement has different results. The article clearly demonstrates the diffraction effect on speakers and the benefits of having it under control.
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Driver Selection for Multi-Way Speakers
by Richard Honeycutt

Driver Selection for Multi-Way Speakers

Speakers evolved from a single sound source to having separate low-frequency and high-frequency drivers, each optimized for its own frequency range, to multi-way designs, with additional low-mid, high-mid and even super-high frequency drivers. Dr. Richard Honeycutt explains how to optimally choose these drivers. This article was originally published in Voice Coil, January 2012.
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Minimum Pole Diameter Tool from Redrock Acoustics
by Patrick Turnmire

Minimum Pole Diameter Tool from Redrock Acoustics

The amount of flux running through the pole in a conventional “Hamburger” motor structure is a key loudspeaker design element that is often a limiting factor in the design process. PoleSolver is a design tool from Redrock Acoustics that makes all the different calculations quick and easy. An article originally published by Voice Coil, August 2010.
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A Look at Voice Coil Collars
by Mike Klasco

A Look at Voice Coil Collars

There are many subtle ways a speaker designer can use the collar to “tune” the speaker-design for optimum response, added strength, increased thermal tolerance, better assembly fit, and more. Many materials are available for use as a collar but a careful understanding of the physical properties of these materials is required for optimum selection. Originally published by Voice Coil, May 2012.
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