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A FINE Circle Speaker Design Tutorial. Part 2 — The Tweeter
by Peter Larsen

A FINE Circle Speaker Design Tutorial. Part 2 — The Tweeter

This is the second part of Peter Larsen's tutorial for the design of a complete loudspeaker from transducer to final product. The target design is a two-way speaker with a 6.5" woofer and a 1" dome tweeter. Having previously explained the woofer design, in this second article, Peter Larsen explains the process for a 1" silk dome tweeter.
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R&D Stories: Motion Feedback for Active Desktop Subwoofers
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.
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Getting to Know Dutch & Dutch
by Jan Didden

Getting to Know Dutch & Dutch

With a visit to Dutch & Dutch, Jan Didden unveils the journey of this innovative speaker manufacturer from The Netherlands. This company, founded in 2014, has so far achieved remarkable success with a single product designed to break the vicious cycle of speakers and room acoustics. The Dutch & Dutch 8c is a no-compromise active speaker designed to work together with the acoustics of the listening room.
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A FINE Circle Speaker Design Tutorial. Part 1 — The Design
by Peter Larsen

A FINE Circle Speaker Design Tutorial. Part 1 — The Design

For Voice Coil, Peter Larsen developed a tutorial for the design of a complete loudspeaker from transducer to final product. A great way to gain a practical perspective of the whole family of Loudsoft software tools. The target design will be a two-way speaker with a 6.5" woofer and a 1" dome tweeter, and this issue contains part one of this valuable exercise.
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First Magnet Powder Presses to Produce Neodymium Permanent Magnets in the United States
by Mike Klasco

First Magnet Powder Presses to Produce Neodymium Permanent Magnets in the United States

Most of us assume that neodymium must only come from China. Yet, rare earth ore is available in California, and reshoring neo-magnet production, including recycling neodymium, is now accelerating in the US. Mike Klasco (Menlo Scientific), tipped off by Salvador Magdaleno (Salvador Consultant), writes about the first manufacturing operation that is ready to deliver neodymium permanent magnets in the United States. This article was written originally for The Audio Voice newsletter.
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Schurter Extends FMAB NEO Single-Phase Block AC Filter Series with New High-Performance Model
by Cristina Costa

Schurter Extends FMAB NEO Single-Phase Block AC Filter Series with New High-Performance Model

Schurter, a leading provider of EMC filters, introduced its new FMAB NEO High-Performance single-phase AC block filter, designed to meet the demands of increasing electromagnetic interference generated in modern-day electronic applications. The new 1-stage-line-filter with high attenuation is available with ground line choke and multiple case variants for class II protection with optimal symmetrical noise attenuation characteristics.
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No Zipper, No Pop! How ADC Hybrid Gain Control Can Enable Smooth, Pop-Free Microphone Preamp Gain Changes
by Michael Chandler-Page

No Zipper, No Pop! How ADC Hybrid Gain Control Can Enable Smooth, Pop-Free Microphone Preamp Gain Changes

This article explains the new hybrid gain control (HGC) feature of Cirrus Logic’s latest CS530xP family of Pro Audio ADCs and how these can eliminate noise problems when changing gain on digitally controlled mic preamps. This solution enables fine-resolution mic preamp gain control, with the feel of a traditional potentiometer but without audible pops or zipper noise by integrating control into the ADC, together with zero-cross detection and precisely synchronized digital gain control.
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TP Vision To Introduce Philips Branded Self-Powered Products at CES 2024
by Joao Martins

TP Vision To Introduce Philips Branded Self-Powered Products at CES 2024

Exeger announced a strategic partnership with TP Vision, the company responsible for design, manufacturing, and sales of Philips branded TV and audio products, to integrate Exeger's ground-breaking solar cell technology, Powerfoyle, into Philips consumer electronics products. Philips sport headphones with Powerfoyle technology will be launched at CES 2024, together with another product in a different segment.
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STMicroelectronics Accelerates Development of Qi Wireless Chargers
by audioXpress Staff

STMicroelectronics Accelerates Development of Qi Wireless Chargers

STMicroelectronics is simplifying development of Qi-compliant wireless chargers up to 15W by introducing transmitter and receiver evaluation boards based on the company’s STWLC38 and STWBC86 ICs. Responding to the fast growing demand for products supporting the Qi wireless standards, these new development solutions will allow developers to quickly build and test wireless-charger prototypes. Both are used with the STSW-WPSTUDIO graphical software environment to assist development.
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TDK Launches Noise Suppression Filters for Audio Lines of High Sound Quality Devices
by Cristina Costa

TDK Launches Noise Suppression Filters for Audio Lines of High Sound Quality Devices

TDK Corporation has announced its latest compact noise suppression filters MAF1005FR series, measuring 1mm (L) x 0.5mm (W) x 0.5mm (H). These multilayer chip components are designed to improve sound quality and reduce noise interference in the audio lines (sound lines) of smartphones, portable devices, and wearables. Mass production of the new EMC components series started in November 2023.
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