All items tagged with negative feedback (12)

Discover the Best Car Audio Experiences with audioXpress June 2025

May 12, 2025 by audioXpress Staff

Discover the Best Car Audio Experiences with audioXpress June 2025

The June issue of audioXpress focuses on Automotive Audio and features an in-depth report by Roger Shively and J. Martins, plus articles from Jacob Soendergaard and Jesse Gratke (HEAD acoustics), Paul Beckmann and John Whitecar (DSP Concepts), Alexander Goldin (Alango Technologies), and Steve Temme (Listen). On other topics, Eric Carmichel describes an occluded ear simulator (OES) test solution, and Simon Ashton (AudioSmile) offers the technical details of his Little British Monitor (LBM).

ICEpower Updates Existing Amplifier Modules with New Technology

March 25, 2025 by Joao Martins

ICEpower Updates Existing Amplifier Modules with New Technology

The Danish purveyor of high-performance Class-D amplifiers, ICEpower, announced it will be progressively updating its amplifier modules with the full benefits of its new Conductor topology and integrated gate driver ICC5 chips, combined with refined design and functionality. The integration, ICEpower says, takes audio quality to the next level and redefines the company’s already renowned amplifier technology. First products to receive the updates are the 50ASX2, 125ASX2, 700AS1, and 700AS2 modules.

Joachim Gerhard on Low Noise Phono Stages: Design Considerations and Circuit Topologies

November 6, 2024 by Jan Didden

Joachim Gerhard on Low Noise Phono Stages: Design Considerations and Circuit Topologies

Ask audio industry insiders and audiophiles alike about Joachim Gerhard, and chances are that they mention the many high performance speakers he designed over the years, initially for Audio Physic, currently for Suesskind Audio. But Gerhard also has a great track record designing phono preamps. This interview explores that aspect of Joachim’s career. In the first part of this interview Joachim discusses the design considerations and circuit topologies for low noise phono stages, culminating in his very low noise and Flexible Phono Stage (FPS) design. This article was originally published in audioXpress, September 2024.

R&D Stories: Motion Feedback for Active Desktop Subwoofers

December 8, 2023 by Zami Schwartzman

R&D Stories: Motion Feedback for Active Desktop Subwoofers

Zami Schwartzman, the founder of Servobass, shares his journey into the application of Motion Feedback (MFB) methods for active subwoofers. He explores passive and active bass enhancement methods and how Servobass arrived at an optimized design using MFB techniques to achieve highly performing active subwoofers in desktop and compact sizes. A solution that is now available to be licensed by the industry. This article was originally published in audioXpress, November 2023.

New Luxman L-509Z Flagship Integrated Amplifier

September 22, 2023 by audioXpress Staff

New Luxman L-509Z Flagship Integrated Amplifier

Luxman continues to prepare for 2025, the company’s centennial, with a new top-of-the-line integrated amplifier. In addition to the company's trademark sound quality, the L-509Z incorporates the Luxman Integrated Feedback Engine System (LIFES1.0) in both the power amp and preamp sections. It's also the first with the Luxman Electronically Controlled Ultimate Attenuator-EX (LECUA-EX) volume control. The L-509Z integrated amplifier is available at a suggested retail price of $12,495.

Audio Myths: Feedback Re-Entrant Distortion. Should We Worry?

September 14, 2023 by Jan Didden

Audio Myths: Feedback Re-Entrant Distortion. Should We Worry?

There are many aspects of negative feedback in audio that are the subject of continued discussion. Jan Didden continues to debunk more Audio Myths. This article addresses re-entrant distortion. The idea is that, since negative feedback sends some of the distorted output signal back to the input, this already-distorted signal would only get more distorted by going through the nonlinear amplifier, over and over again.

Audio Myths: Feedback Cannot Fix What Has Already Happened

August 24, 2023 by Jan Didden

Audio Myths: Feedback Cannot Fix What Has Already Happened

This article, originally published in The Audio Voice newsletter (#434), explores some practical experiments with Negative Feedback. "If I had a dollar for every time someone mentioned that negative feedback cannot work, because you cannot correct something after it happened, I would be a rich man," says Jan Didden. "Yes, it can be hard to get your head around feedback circuits for audio amplifiers. Yet, all it takes is to look around you," he adds.

Explore Audio Amplifier Technology and Design in audioXpress July 2021

June 11, 2021 by audioXpress Staff

Explore Audio Amplifier Technology and Design in audioXpress July 2021

One of the strongest issues ever in terms of audio electronics and market insights, audioXpress July 2021 is now available. This edition includes a complete overview of Audio Amplifier Technology and Design and its many application segments. Start with a review of the NAD Electronics M33 Masters streaming amplifier, followed by a great new upgrade design for the legendary Hafler DH-220 lateral MOSFET power amplifier, and then dive into a new hybrid voltage source and current source amplifier design for loudspeakers.

Luxman Announces New D-10X Flagship SACD/CD Player Using Latest ROHM MUS-IC DAC

July 17, 2020 by audioXpress Staff

Luxman Announces New D-10X Flagship SACD/CD Player Using Latest ROHM MUS-IC DAC

Luxman America announced the launch of its D-10x flagship SACD/CD player and USB DAC. This is the world’s first home audio component using ROHM Semiconductor’s eagerly anticipated MUS-IC BD34301EKV Delta-Sigma digital-to-analog converter. The D-10x also features refinements on the LxDTM-i disc transport mechanism and a new ODNF-u analog circuit. Other highlights include full MQA decoding and MQA-CD playback.

Much to Learn and Discover with audioXpress October 2016. Now Available!

September 12, 2016 by audioXpress Staff

Much to Learn and Discover with audioXpress October 2016. Now Available!

audioXpress October 2016 is now available online and features two exciting reviews—one on the Bricasti Design M1 Dual Mono DAC - Deluxe Limited Edition and the other on the XiVero MusicScope file analysis software. We also report on this year’s 2016 Midwest Audiofest Speaker Design competition; Christopher Paul shares his Regulated Filament Supply project; and we talk about microphones with Matthew McGlynn, owner of Microphone-Parts. This and much more to read. Download your edition now.

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