All items tagged with September 2021 (9)

R&D Stories: The Tetrahedral Test Chamber Story (Part 1) - Recognizing the Need for Consistent Measurements

December 29, 2021 by Geoff Hill

R&D Stories: The Tetrahedral Test Chamber Story (Part 1) - Recognizing the Need for Consistent Measurements

This article revisits the story of the development of the Tetrahedral Test Chamber (TTC), by Geoff Hill, loudspeaker engineer, author, and inventor, in an effort to solve the longstanding problem of making consistent loudspeaker measurements. This innovative loudspeaker test chamber is now defined in international standards and in use throughout the world, scalable to any size of loudspeaker driver. This article was originally published in audioXpress, September 2021.

Test Bench: Three New High-End 25mm High-Frequency Transducers from BlieSMa

December 1, 2021 by Vance Dickason

Test Bench: Three New High-End 25mm High-Frequency Transducers from BlieSMa

This Test Bench combines three new 25mm high-frequency transducers from German brand BlieSMa into a single characterization: the BlieSMa T25S-6 Silk Dome, the BlieSMa T25B-6 Beryllium Dome, and the BlieSMa T25D-6 Diamond Dome. All three tweeters appear to be built on the same platform, but optimized for each diaphragm material, and all three share pretty much the same feature set. BlieSMa was founded in January 16, 2018 by former Morel and Accuton engineer, Stanislav Malikov. This article was originally published in Voice Coil, September 2021.

Parameter Estimation and Box Simulation with Speakerbench (Part 2) - Introducing Speakerbench

November 17, 2021 by Claus Futtrup and Jeff Candy

Parameter Estimation and Box Simulation with Speakerbench (Part 2) - Introducing Speakerbench

In the first part of this work, the authors discussed the difficulties in estimating cabinet losses using the classical Thiele-Small framework, and proposed a solution using an advanced transducer model. In this second article, the authors detail how their Speakerbench web-app offers an accurate and practical approach to this problem, and demonstrate how users will be able to easily and accurately determine the best suitable box volume for a loudspeaker system. This article was originally published in audioXpress, September 2021.

OEM DSP Active Line Level Crossovers from Danville Signal

November 17, 2021 by Vance Dickason

OEM DSP Active Line Level Crossovers from Danville Signal

The advantages of active DSP crossovers are long recognized and a majority (about 90%) of today's professional audio loudspeakers and studio monitors are powered loudspeakers using also some kind of integrated DSP. Based in Minneapolis, MN, Danville Signal Processing has long been supplying high-performance DSP crossovers and DSP modules to the OEM market. In this article, Vance Dickason writes about the range of DSP Active Line Level Crossovers available from the company. This article was originally published in Voice Coil, September 2021.

DaS AuReality — 3D Loudspeaker Technology

November 10, 2021 by Joe Hayes

DaS AuReality — 3D Loudspeaker Technology

A fully patented 3D loudspeaker technology resulted from a multi-year effort of Diffusion at Source (DaS) and elliptical soundfield speaker design approaches. DaS AuReality has evolved out of work known as “Acoustic3D” from an Australian-based company and is now being commercialized by Vastigo, Ltd. (Vastigo.com), headquartered in Singapore. This article offers all the details into the unique approach followed by the development and multiple applications segments envisioned by the inventors. This article was originally published in Voice Coil, September 2021.

Fresh From the Bench: Parasound Halo JC 5 Stereo Power Amplifier - The Measurements

October 27, 2021 by Stuart Yaniger

Fresh From the Bench: Parasound Halo JC 5 Stereo Power Amplifier - The Measurements

Oliver A. Masciarotte was looking for an amplifier that he could respect without emptying his bank account. Richard Schram offered to send the Parasound JC 5, his company’s largest stereo power amplifier for evaluation. Anticipating the fun of enjoying the pleasures of this John Curl design, Oliver accepted the challenge, and Stuart Yaniger tested the JC 5 to confirm the amplifier’s merits with actual measurements. This article was originally published in audioXpress, September 2021.

Fresh From the Bench: Parasound Halo JC 5 Stereo Power Amplifier - Traditional Goodness

October 27, 2021 by Oliver A.Masciarotte

Fresh From the Bench: Parasound Halo JC 5 Stereo Power Amplifier - Traditional Goodness

Oliver Masciarotte was looking for an amplifier that he could respect without emptying his bank account. Richard Schram offered to send the Parasound JC 5, his company’s largest stereo power amplifier for evaluation. Anticipating the fun of enjoying the pleasures of this John Curl design, Oliver accepted the challenge, and Stuart Yaniger tested the JC 5 to confirm the amplifier’s merits with actual measurements. This article was originally published in audioXpress, September 2021.

Find Solutions for Different Speaker Designs in Voice Coil September 2021

August 26, 2021 by audioXpress Staff

Find Solutions for Different Speaker Designs in Voice Coil September 2021

In Voice Coil September 2021, Vance Dickason writes about DSP crossovers from Danville Signal, Joe Hayes (Vastigo) writes about the DaS AuReality patented 3D loudspeaker technology, and Mike Klasco finds speaker-related technologies that help support smart speaker design efforts. This edition's Test Bench characterizes three new 25mm high-frequency tweeters from BlieSMa, using silk, beryllium, and diamond domes: BlieSMa’s T25S-6, T25B-6, and T25D-6.

audioXpress September 2021 Takes Speaker Building to the Next Level

August 11, 2021 by audioXpress Staff

audioXpress September 2021 Takes Speaker Building to the Next Level

audioXpress September 2021 celebrates its Speaker Builder magazine origins, once again offering an expanded focus on loudspeaker building, design, and testing. Mike Klasco provides an update on Speaker Technology, Claus Futtrup and Jeff Candy discuss Parameter Estimation and Box Simulation with Speakerbench, and Geoff Hill tells us the Tetrahedral Test Chamber Story. In this edition we pay tribute to Roger Russell (1935-2021) and we feature two great DIY projects. Now available online and in print.