All items tagged with September 2020 (11)

Altec Lansing’s Voice of the Theatre Speakers - What You Need to Know

June 14, 2021 by Scott Dorsey

Altec Lansing’s Voice of the Theatre Speakers - What You Need to Know

A design by John Hilliard, Altec Lansing Voice of the Theatre systems originally targeted movie theaters. The entire series was gradually expanded for use in general sound reinforcement and later converted in extreme high-end audio segments for hi-fi home use. Dorsey knows cinema sound inside and out, and in this article he shares his personal thoughts about these highly valued horn designs, and provides valuable tips on how to restore them. This article was originally published in audioXpress, September 2020.

Audio Manufacturing in Vietnam: An Introduction to a Brave New World

December 16, 2020 by Mike Klasco

Audio Manufacturing in Vietnam: An Introduction to a Brave New World

This article for Voice Coil magazine offers a valuable perspective about one of the most promising manufacturing opportunities in Asia. While there has been speaker parts manufacturing and speaker assembly for more than 20 years in Vietnam, the recent influx of speaker and audio OEM/ODMs that are expanding satellite factories through the country was motivated particularly by companies looking to counter the trading tariffs imposed in the United States. This article was originally published in Voice Coil, September 2020.

Test Bench: SB Acoustics Satori TW29TXN-B-4 TeXtreme Diaphragm Tweeter

November 19, 2020 by Vance Dickason

Test Bench: SB Acoustics Satori TW29TXN-B-4 TeXtreme Diaphragm Tweeter

In this Test Bench article, Vance Dickason focused on a home audio TeXtreme diaphragm tweeter from SB Acoustics' Satori line, the TW29TXN-B-4. What makes this tweeter so special is that it has a new TeXtreme diaphragm, a novel type of material that is used in applications that require a high degree of stiffness performance in combination with ultra-light weight. This article was originally published in Voice Coil, September 2020.

Thin-Film High-Frequency Transducers (Part 2) - The LT2/LT6 Ribbon Transducers

October 28, 2020 by Igor Levitsky

Thin-Film High-Frequency Transducers (Part 2) - The LT2/LT6 Ribbon Transducers

In its August 2020 edition, Voice Coil featured an article by experienced speaker designer Igor Levitsky on The Advantages of Thin-Film High-Frequency Transducers. In a follow-up Spotlight article the author returns to expand on the development and design aspects of the Radian Audio LT2/LT6 Ribbon Planar transducers - its more recent, commercially available project, in which he continues to be involved. This article was originally published in Voice Coil, September 2020.

Fresh From the Bench: The Magnepan LRS, Back to the Future

October 15, 2020 by Oliver A.Masciarotte

Fresh From the Bench: The Magnepan LRS, Back to the Future

Forced to shelter at home, Oliver Masciarotte looked around his home base in the Twin Cities, and decided it was time to have a serious look at the Magnepan LRS (Little Ribbon Speaker) the company's latest affordable, full-range quasi-ribbon speaker. For this review, Masciarotte writes about what he heard, while Kent Peterson (Warkwyn) measures its performance in the lab. If you are curious to see how does a ribbon speaker measures on a Klippel Near-Field Scanning (NFS) system you definitely want to check out this article, originally published in audioXpress, September 2020.

R&D Stories: How Virtual Product Development Improves the Quality of Consumer and Pro Audio Products

October 1, 2020 by Alfred Svobodnik

R&D Stories: How Virtual Product Development Improves the Quality of Consumer and Pro Audio Products

This article addresses how modern methods of acoustical virtual product development make it possible to assess and optimize quality and performance problems throughout the entire product development process. Using a combination of modeling, simulation, and measurement tools, everything can be analyzed in-depth before building the physical product, the two authors explain. This article was originally published in audioXpress, September 2020.

Practical Test & Measurement: Fast and Reliable End-of-Line Acoustic Defect Detection

September 23, 2020 by Wolfgang Klippel

Practical Test & Measurement: Fast and Reliable End-of-Line Acoustic Defect Detection

This article discusses end-of-line testing, a crucial step in production, which requires very specific procedures and measurements. Specifically, the authors focus on testing irregular acoustic defects (also known as Rub & Buzz) to reduce the test time and optimal solutions to speed automatic testing in a production environment. This article was originally published in audioXpress, September 2020.

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Practical Test & Measurement: Loudspeaker Measurements at Home - A Guide for Building Your Own Test Chamber

September 9, 2020 by Geoff Hill

Practical Test & Measurement: Loudspeaker Measurements at Home - A Guide for Building Your Own Test Chamber

Our friend Geoff Hill, the inventor of the original tetrahedral test chamber (TTC), explores how to do loudspeaker measurements at home. For those of us without an anechoic chamber at home, Hill explains how to build our own test chamber. With the build description, he also provides a valuable guide on alternative loudspeaker measurement techniques. This article was originally published in audioXpress, September 2020.

Test Bench: Oberton ND45 Pro Sound Compression Driver

September 2, 2020 by Vance Dickason

Test Bench: Oberton ND45 Pro Sound Compression Driver

For this Voice Coil Test Bench, Vance Dickason characterized the ND45 compression driver from Oberton, which has been in development for some time, and is an improved version of the company's previous ND2545 design. The ND45 was submitted along with the H-960 1" throat PBT-PET 90x 60º constant directivity horn. The ND45 has a 44 mm (1.75”) diameter two-layer voice coil wound with aluminum wire wound onto a Kapton former driving a polyester sandwich diaphragm and vented surround, with the entire assembly being field replaceable. This article was originally published in Voice Coil, September 2020.

Expand Your Horizons in Speakers with Voice Coil September 2020

August 26, 2020 by audioXpress Staff

Expand Your Horizons in Speakers with Voice Coil September 2020

This is certainly a very heterogeneous edition of Voice Coil. It features a special report about manufacturing in Vietnam, complete with a directory and a list of trade shows. Igor Levitsky returns to offer valuable details about the latest Radian Audio Engineering LT2/LT6 Ribbon Planar transducers. James Croft reviews a "Venting System for Vehicle Speaker Assembly patent," recently granted to Harman. And, Vance Dickason characterizes the ND45 1" compression driver from Oberton, and the TW29TXN-B-4 TeXtreme diaphragm tweeter from SB Acoustics' Satori line. Voice Coil September 2020 is now available online and in print.

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