All items tagged with electrostatic (27)

You Can DIY! eDD - A Direct-Drive Amplifier for Electrostatic Speakers

February 21, 2024 by Jan Didden

You Can DIY! eDD - A Direct-Drive Amplifier for Electrostatic Speakers

This article details a lifetime project from audioXpress' technical editor Jan Didden. After a successful restoration project of a pair of precious ESL-63 Quad electrostatic speakers, he opted to design and build the eDD, a well-performing high voltage amplifier to directly drive electrostatic speakers. This challenging but successful DIY project with a design goal of 1500V RMS at 20mA RMS over the full audio band, took a while to complete but was a success. This article shares every step of the construction.

Everything That's Audio in audioXpress December 2023

November 14, 2023 by audioXpress Staff

Everything That's Audio in audioXpress December 2023

audioXpress December 2023 includes a market overview of multiroom audio, Brent Butterworth writes about new ways to measure ANC earbuds, and Stuart Yaniger measured the new Axign and GaN Systems Class-D audio amplifier board. Richard Honeycutt writes about tubes, BJTs, JFETs, MOSFETs, and ICs, and Dimitri Danyuk, discusses JFETs in audio circuits. Douglas Self explains how to optimize variable-frequency tone controls, and Jan Didden shares his eDD direct-drive amplifier project.

Patent Review: Self-Bias Emitter Circuit

November 1, 2023 by James Croft

Patent Review: Self-Bias Emitter Circuit

This article reviews an intriguing new patent awarded to Turtle Beach Corp. addressing a new emitter circuit for providing a bias voltage, which is key for the development of electrostatic loudspeakers. Extremely aware of the techniques and historical perspective of the development in this area, Croft provides a complete overview of all the challenges, implications and merits of this patent and prior art. This article was originally published in Voice Coil, July 2018.

Warwick Acoustics Car Audio Transducers Help Eliminate Rare Earth Elements Usage

October 16, 2023 by audioXpress Staff

Warwick Acoustics Car Audio Transducers Help Eliminate Rare Earth Elements Usage

Warwick Acoustics is working with a number of notable car manufacturers to support the elimination of Rare Earth Elements (REEs) from their vehicles by promoting the use of its ‘zero-REE’ Electroacoustic panels. As high-profile car manufacturers and OEMs are aiming to eliminate REEs in their vehicles, the UK-based audio company says that elements commonly used in audio systems, such as neodymium and dysprosium, typically make up to 30% of REE content still remaining in new-generation electric vehicles.

R&D Stories: Developing an Electrostatic Transducer

June 7, 2023 by Comsol Multiphysics

R&D Stories: Developing an Electrostatic Transducer

This article discusses how Warwick Audio Technologies designed a completely new type of transducer for high-end electrostatic headphones using the latest materials, validated with computer simulation tools from Comsol. The design process for the High-Precision Electrostatic Laminate (HPEL) transducer was first available in the outstanding Sonoma Model One, the world’s first headphones to use HPEL audio transducers, and all subsequent Warwick products, now expanding also to automotive applications. This article was originally published in audioXpress, April 2018.

Electrostatic Loudspeakers and Two Cutting-Edge High-End Tweeters in Voice Coil June 2023

May 31, 2023 by audioXpress Staff

Electrostatic Loudspeakers and Two Cutting-Edge High-End Tweeters in Voice Coil June 2023

Voice Coil June 2023 features an extensive patent review in James Croft's Acoustic Patents column. The topic is a 2014 patent awarded to Nokia, offering an opportunity to revisit the history of electrostatic loudspeakers, with insights from Tim Mellow, one of the two listed inventors. In Test Bench, Vance Dickason focuses on the D8404-552000 Ellipticor cloth diaphragm dome midrange from Scan-Speak, and characterizes the SB Acoustics TW29BNWG beryllium dome and waveguide from the brand's prestigious Satori line.

Warwick Acoustics Ready to Scale Electroacoustic Panel Technology for In-Car Audio

February 22, 2023 by Joao Martins

Warwick Acoustics Ready to Scale Electroacoustic Panel Technology for In-Car Audio

Following successful R&D and product development phases, Warwick Acoustics has entered 2023 with an accelerating program to commercialize its electroacoustic panel technology, focusing on the automotive industry. Warwick Acoustics is hiring and investing in facilities to support the substantial commercial pipeline under development. Warwick's electroAcoustic panels, already proven in high-end headphones, are now ready for car audio applications.

Warwick Acoustics Adds Experienced Automotive Industry Executive to Its Board of Directors

December 13, 2022 by audioXpress Staff

Warwick Acoustics Adds Experienced Automotive Industry Executive to Its Board of Directors

Warwick Acoustics, the UK-based audio technology company renowned for its electrostatic loudspeaker drivers and products has expanded its Board through the appointment of Ian Harnett, a highly respected and longstanding senior executive in the automotive industry, as a Non-Executive Director. The appointment comes only eight months after Warwick Acoustics entered the automotive audio sector following an intense five-year R&D program.

Warwick Acoustics Promotes Patented Electrostatic Transducer Panels for Automotive Applications

March 28, 2022 by Joao Martins

Warwick Acoustics Promotes Patented Electrostatic Transducer Panels for Automotive Applications

Warwick Acoustics already achieved significant recognition with its unique electrostatic transducers, currently used in the world's best sounding headphones (unfortunately also the most expensive and only available with a dedicated amplifier and electronics). Now, the UK-based audio technology company says that it is primed to disrupt the $8 billion in-car audio market with its ultra-light and low-power patented electrostatic technology, key in modern automotive systems.

Dragoslav Colich Receives Innovation Award From Los Angeles & Orange County Audio Society

December 6, 2021 by audioXpress Staff

Dragoslav Colich Receives Innovation Award From Los Angeles & Orange County Audio Society

Audeze Co-Founder and CTO, Dragoslav Colich, has received the 2021 George and Carolyn Counnas Innovation Award from the Los Angeles & Orange County Audio Society for his life’s work and achievements. The award was presented Sunday, December 5, at the Society's annual gala in Los Angeles. Dragoslav Colich was recognized by his extraordinary life’s work with planar magnetic transducers and his overall contributions to the audio industry.

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