All items tagged with Joe D’Appolito (15)

Leading-Edge Knowledge Available with Voice Coil December 2020

November 25, 2020 by audioXpress Staff

Leading-Edge Knowledge Available with Voice Coil December 2020

Voice Coil December 2020 offers a diverse set of articles for loudspeaker professionals and anyone in the audio industry. Mike Klasco writes about MEMS Drivers and related hot technologies for 2021. Next up, James Croft discusses a new patent granted in October 2020 to inventor Eric Jay Alexander, and in Test Bench, Vance Dickason characterizes the recent BWX-6501 Midbass driver and the BDT-2901 Silk Dome Tweeter, both from MISCO’s Bold North Audio Line. Now Available in Print and Download!

audioXpress.com - The Most Popular Stories of 2018

December 28, 2018 by audioXpress Staff

audioXpress.com - The Most Popular Stories of 2018

2018 was another record-breaking year for audioXpress.com with visits and users doubling the figures compared to our record year in 2016. Want to know which of the topics and stories published online in 2018 were the most popular? We looked at the most-read articles of 2018 in audioXpress.com (which also includes selected articles from Voice Coil magazine), and we created this Top 10 list of news stories and online articles. Here are the results!

Welcome to 2019 and Start Strong with audioXpress!

December 11, 2018 by audioXpress Staff

Welcome to 2019 and Start Strong with audioXpress!

The January 2019 (CES) edition of audioXpress has arrived. Read our Microphone Market Update, addressing the latest cutting-edge microphone technologies, and learn how Zylia created its ZM-1 spherical microphone array. Also in this edition, Joe D’Appolito explains how to address the equalization of closed-box subwoofers, Hans W. Gierlich writes about testing Smart Home Devices, David Logvin reviews the Lepai LP40PA plate amplifier, and George Ntanavaras describes a stereo analog preamplifier DIY project. Oh, and read Erik Owen's unique take on Rocky Mountain Audio Fest (RMAF) 2018.

Measuring Loudspeaker Low-Frequency Response

November 14, 2018 by Joe D'Appolito

Measuring Loudspeaker Low-Frequency Response

With the availability of low-cost, PC-based acoustic data acquisition systems, experienced hobbyists can make highly accurate loudspeaker frequency-response measurements without an anechoic chamber. The power of these systems comes at a price. These systems window the time-domain measurement to eliminate room reflections. This, in turn, limits low-frequency response. This article was originally published in audioXpress, June 2012.

Constructing and Reviewing the SEAS Froy Mk3

October 11, 2017 by Joe D'Appolito

Constructing and Reviewing the SEAS Froy Mk3

On March 2003, Edward T. Dell, Jr., audioXpress founder, published a complete build project for the SEAS Froy Mk3, an improved version of the original Froy kit, designed by Murray Zeligman, who also designed the original FROY kit. The Froy Mk3 kit uses two W15CY001 woofers and a single T25CF002 "Millennium" tweeter mounted in a D'Appolito configuration. In the subsequent April 2003 edition, audioXpress published a complete review of the Froy Mk3, with measurements by Joseph D’Appolito, and listening evaluation from Dennis Colin.

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Practical Test & Measurement: Sound Cards for Data Acquisition in Audio Measurements (Part 7) - Pitting the CLIO Pocket Against a Sound Card

May 24, 2017 by Stuart Yaniger

Practical Test & Measurement: Sound Cards for Data Acquisition in Audio Measurements (Part 7) - Pitting the CLIO Pocket Against a Sound Card

In this article of a series on how to create a low-cost system for lab-grade audio electronics measurements, Stuart Yaniger decided to do a comparison experiment between a dedicated but very affordable measurement solution - the Audiomatica CLIO Pocket - and its own sound-card based system described previously. This article was originally published in audioXpress, December 2015.

Practical Test & Measurement: Sound Cards for Data Acquisition in Audio Measurements (Part 3)

April 26, 2017 by Stuart Yaniger

Practical Test & Measurement: Sound Cards for Data Acquisition in Audio Measurements (Part 3)

In this article series, Stuart Yaniger examines ways to create a low-cost system for lab-grade audio electronics measurements. The pieces of a powerful modern measurement system comprise a sound card, software, and a signal conditioning interface and, of course, the right computer. That’s where Yaniger delves in this third part, also sharing some of his first findings on available software. This article was originally published in audioXpress, August 2015.

Frequency Delay Dispersion

March 21, 2017 by Dennis Colin

Frequency Delay Dispersion

The phase nonlinearity of most second- and higher-order speaker crossovers is illustrated with the step response of cascaded all-pass networks. Audibility issues are discussed. The audibility threshold depends on many factors; reports vary from about 100μS to 2mS. A sufficient amount, though, is certainly audible. This article was originally published in audioXpress, November 2007.

VC Spotlight: CLIO Pocket User Report

February 15, 2017 by Vance Dickason

VC Spotlight: CLIO Pocket User Report

In this article, Vance Dickason explores Audiomatica's CLIO Pocket analyzer. Rather than go into detail regarding all the measurement routines available in CLIO Pocket - audioXpress already published a thorough review in the October 2015 issue - Dickason gives practical examples using measurements for a couple of drivers in the same way he does for his monthly column, Test Bench. This article was originally published in Voice Coil, March 2016.

Testing Loudspeakers: Which Measurements Matter, Part 2

November 16, 2016 by Joe D'Appolito

Testing Loudspeakers: Which Measurements Matter, Part 2

In this reference article, published by audioXpress in 2008, Joe D’Appolito shares his experiments with loudspeaker evaluation. In the two parts of this article, D’Appolito tries to answer the question: “Of all the measurements available to the designer, which ones are the best predictors of listener preference?" In over 30 years of designing loudspeakers, I have found the following measurements taken as a group provide the strongest predictor of loudspeaker preference available to us today,” he states.

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