All items tagged with Claus Futtrup (14)

Aiming for Better Loudspeaker Designs in Voice Coil July 2024

June 28, 2024 by Joao Martins

Aiming for Better Loudspeaker Designs in Voice Coil July 2024

In this July 2024 issue of Voice Coil, Vance Dickason introduces a new article series about Outboard DSP, Mike Klasco explores Diamond Coatings for Speakers, there is an updated directory of Adhesives, Coatings, Sealants, High-Tech Thin Films, Converters, and Dispensing Equipment vendors, and Claus Futtrup writes about the IB4 Bass Reflex Alignment. Vance Dickason’s Test Bench characterizes the new Scan-Speak 15W/8534T00 5.5” woofer, and D3404/606200 Metamodal TPCD tweeter.

Loudspeaker Bass Reflex Alignments

June 5, 2024 by Claus Futtrup

Loudspeaker Bass Reflex Alignments

The use of standard filter alignments represents a foundational concept in the loudspeaker industry, with an impact nearly as significant as the invention of the electro-dynamic loudspeaker principle itself. As one of the creators of Speakerbench, a web-based speaker design tool, in collaboration with Jeff Candy, Claus Futtrup is in a unique position to discuss the evolution of enclosure designs based on this electrical filter theory, including the concept of an alignment chart.

Voice Coil June 2024 Explores More Drivers and Transducer Options

May 29, 2024 by audioXpress Staff

Voice Coil June 2024 Explores More Drivers and Transducer Options

In the June 2024 issue of Voice Coil, Claus Futtrup explores the Linkwitz-Riley (LR4) Bass Reflex Alignment, in Acoustic Patents, James Croft revisits an important invention from Bang & Olufsen, which has been granted the respective patent, and Vance Dickason characterizes the new Wavecor WF211PA01 8.25" woofer and the Faital Pro 10PR330 10" woofer, both suitable for PA systems and professional applications. Finally, there's an updated industry directory of Headphone Test & Measurement Equipment.

Loudspeaker Knowledge and Resources in Voice Coil May 2024

April 29, 2024 by audioXpress Staff

Loudspeaker Knowledge and Resources in Voice Coil May 2024

Voice Coil May 2024 includes valuable speaker design knowledge, courtesy of Claus Futtrup, who writes about Computation of Bass Reflex Alignments. And this issue includes an updated Microspeaker Vendor Directory, with a MEMS Microspeaker Subdirectory, compiled by Mike Klasco and Nora Wong. And Vance Dickason placed the unique W4-2315 4.5” coaxial from Tang Band Speaker, together with Faital Pro's 5HX140 5” pro sound coaxial on Test Bench.

Improve Your Audio Designs in 2024 with audioXpress

December 12, 2023 by audioXpress Staff

Improve Your Audio Designs in 2024 with audioXpress

In audioXpress January 2024, Martin Turesson explains how Thin-ply Carbon Diaphragm (TPCD) technology can be applied also to headphones, and Claus Futtrup writes about Loudspeaker Bass Reflex Alignments. Paul Marchese discusses Composite Amplifiers, Roger Tall explains how a research effort allowed ClarityCap to understand the impact of resonances in capacitors. Our own Jan Didden interviews Robert Munnig Schmidt, while audio expert Ethan Winer explores audible consequences of jitter in digital audio conversion.

Speakerbench YouTube Channel Discusses Loudspeaker Bass Reflex Alignments

August 1, 2023 by audioXpress Staff

Speakerbench YouTube Channel Discusses Loudspeaker Bass Reflex Alignments

Claus Futtrup and Jeff Candy, the two creators of the Speakerbench online tool for assisting in speaker design calculations, continue to introduce more and more tools and features in this web-based application. In order to inspire even more the loudspeaker DIY community, the two authors have created an interesting Speakerbench Youtube channel where we can find new interesting videos discussing the history of speaker design theory and specifically Loudspeaker Bass Reflex Alignments.

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.

Parameter Estimation and Box Simulation with Speakerbench (Part 1) - Model Parameter Comparisons

November 10, 2021 by Claus Futtrup and Jeff Candy

Parameter Estimation and Box Simulation with Speakerbench (Part 1) - Model Parameter Comparisons

The two authors investigate leakage loss as identified with an advanced transducer model and verified with measurements. This is compared to classical Thiele-Small modeling with the intention to motivate the reader to further explore advanced parameter estimation and box simulation with the Speakerbench Speaker Design Calculations online tool. This two-part article concludes with an overview of how Speakerbench offers an accurate and practical approach to this problem. This article was originally published in audioXpress, August 2021.

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.

audioXpress August 2021 Focus on Acoustics Issue Now Available

July 13, 2021 by audioXpress Staff

audioXpress August 2021 Focus on Acoustics Issue Now Available

The August 2021 edition of audioXpress is now available in print and online. Read our Acoustical Solutions Round-Up 2021 and enjoy the DIY perspectives from Ethan Winer and Thomas Perazella on dealing with room measurements and treatments. David Logvin reviews Audio Precision's APx517B Acoustic Audio Analyzer, while Richard Honeycutt reflects on acoustic challenges for online and in-person meetings. And we conclude the DH-220C MOSFET Power Amplifier article by Bob Cordell and Rick Savas, and the VSCS Amplifier project in this edition.

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