Audio Myths: Why Narrow Bandwidth May Be Better also in the Time Domain.

This article expands the conversation around feedback theory for electronic circuits and audio amplifiers. Do we "really" need wideband open loop in audio amplifiers? The subject came up at the 154th Audio Engineering Society (AES) convention in Helsinki, Finland. Looking at the frequency domain, not necessarily, Jan Didden argued. In this article he looks at the question in the Time Domain. Narrow Bandwidth, High Open Loop Gain Amplifier versus a Wide Bandwidth, Low Open Loop Gain Amplifier in the Time Domain.

Although feedback theory for electronic circuits has been established for over a century, it is still a subject for discussion. This short essay is an attempt to shed some light on one of those recurring controversies. The subject came up at the 154th Audio Engineering Society (AES) convention in Helsinki, Finland. Audio amplifiers are basically integrators or, if you will, low-pass filters. That means that at some frequency, their open-loop gain starts to fall off. With that, the loop gain available for feedback also starts to fall off, leading to a diminishing of the curative effects of feedback: distortion starts to rise, gain accuracy starts to drop, output impedance starts to go up, etcetera.

The topology and the distribution of the wiring, partitioning between low power and high power circuits, grounding scheme, types of cables, protection techniques, and safety are important factors that must be considered to minimize the interference effects in audio amplifiers. This "tips and tricks" audio electronics article provides several details about inductive coupling effects in audio amplifiers and the simple way to minimize them.

audioXpress July 2023 provides an updated market and technology overview of Audio Amplifiers, includes the review of the Hypex Nilai500DIY 500W Power Amplifier Kits, a visit to Dutch company Grimm Audio, and an interview with Rémi Guastavino to discuss the new GRAS EQset measurement microphone series. Plus a review of the new WiiM Pro Music Streaming System, a new article series about Bass Reflex speaker performance, and a lot more.

ICEpower announced the launch of its new website. Designed to redefine the visitors' experience, the revamped site offers all the information about the cutting-edge capabilities of ICEpower's audio technology in the different fields of application. The website also includes information about ICEpower's turnkey solutions using its Class-D amplifier modules and the company's comprehensive information on R&D capabilities. There's even a shop for those who want to order individual modules and solutions.

Audio amplification solutions company ICEpower announced availability of its latest 1000S power supply, filling a gap in the company's portfolio for high-power amplification equipment. Based on the resonant LLC converter of the tried and tested ICEpower 700AS1 module, the new 1000S offers a stable and consistent power supply solution in a compact format to pair with the company's 300A2 and 400A2 modules for applications in hifi, commercial amps, whole home audio and active speakers.

Infineon Technologies AG and GaN Systems Inc. announced that the companies have signed a definitive agreement under which Infineon will acquire GaN Systems for US$830 million. GaN Systems is a global technology leader in the development of GaN-based solutions for power conversion. The company is headquartered in Ottawa, Canada, and has more than 200 employees. With the acquisition Infineon aims to strengthen its GaN portfolio.

Following the acquisition by entrepreneur David Sheriff of the prestigious audio equipment brand Parasound, in December 2022, the company is confirming a series of appointments. Early in his tenure as Parasound's new owner, David Sheriff made a commitment to the company's legendary designer, John Curl, to bring more of his new ideas to the fore. To accelerate this process, Sheriff has hired Darren Myers as Vice President of Research and Development.

Parasound's new owner, David Sheriff, has selected an audio industry veteran, Larry Bennett, for the vital position of Vice President of Sales and Marketing. This announcement marks the first step in an ambitious post-pandemic agenda to revitalize the 42-year-old high-end audio company. These efforts will target its traditional customer base of audiophile enthusiasts as well as the growing market for the custom installation of premium integrated systems.

Several years in the making, answering all the core industry requirements and feedback from users, and creating a next-generation, advanced audio amplifier platform that reinforces Powersoft's leading role in the industry, UNICA is the new market reference. Introduced at ISE 2023 in Barcelona, the future-facing, cloud-based UNICA platform offers simple integration, straightforward configuration and low maintenance costs in one easily upgradable, future-proof package.