All items tagged with circuit design (25)

audioXpress September 2024 Is Live. Make Smart Audio Moves!

August 12, 2024 by audioXpress Staff

audioXpress September 2024 Is Live. Make Smart Audio Moves!

There's a lot of knowledge in audioXpress September 2024. There's a residential installation and home theater Market Update, and a review of the Dayton Audio iMM-6C USB-C Test Microphone. George Ntanavaras shares what he learned using AKABAK simulation software, and Charlie Laub explains all about Derived from Elliptic crossover filters. Read Jan Didden's interview with Joachim Gerhard discussing Low Noise Phono Stages, and learn how to build a Moving-Coil Phono Preamp designed by Sam Dulaney. And much more.

R&D Stories: The Neurochrome Story

July 31, 2024 by Tom Christiansen

R&D Stories: The Neurochrome Story

A personal account of a professional journey that led to the creation of Neurochrome, a company successfully serving audio enthusiasts all over the world with a complete range of power amplifiers kits and circuits, all well-engineered, thoroughly tested, and well-documented. Neurochrome is a small, highly dedicated audio company, providing inspiration, or perhaps a forewarning, for those wishing to venture into the audio business.

Orchard Audio Releases New 500W GaN Monoblock Audio Amplifier

June 4, 2024 by Joao Martins

Orchard Audio Releases New 500W GaN Monoblock Audio Amplifier

Following the launch of its Starkrimson 150W monoblock, Orchard Audio now announced its new state-of-the-art, gallium nitride (GaN) 500W monoblock audio amplifier. The Starkrimson Mono Ultra Premium represents the culmination of Orchard Audio's - and its founder's Leonid (Leo) Ayzenshtat - relentless pursuit of new approaches for audio. This meticulously crafted monoblock amplifier leverages GaN technology and unique Class-D design to deliver unparalleled power, detail, and clarity.

Selecting Electrolytic Capacitors for Lowest Distortion

January 11, 2024 by Douglas Self

Selecting Electrolytic Capacitors for Lowest Distortion

Douglas Self shares real experiments when selecting electrolytic capacitors to achieve the lowest distortion. An experiment inspired by his recent audioXpress article, "Optimizing Variable-Frequency Tone Controls," available online. This short piece is an interesting closer examination on the subject for audio circuit designers. Originally published in The Audio Voice newsletter, #453, January 11, 2024.

New Book by Bob Cordell: Designing Audio Circuits and Systems

January 3, 2024 by Jan Didden

New Book by Bob Cordell: Designing Audio Circuits and Systems

Designing Audio Circuits and Systems will have its 1st Edition published in April 2024, and advanced copies are being sent to reviewers, which includes audioXpress. Bob Cordell, wrote this new book as a comprehensive guide to audio circuits and systems design, beginning with analog audio basics, all the way through to in-depth design techniques for home and professional audio preamps, amplifiers, filters, equalizers, and even headphone amplifiers and DACs.

Audio Electronics: Myths in Tube Circuit Designs

December 20, 2023 by Peter Dieleman

Audio Electronics: Myths in Tube Circuit Designs

Many audioXpress readers will be familiar with Peter Dieleman from his books on the theory and practice of tube amplifiers. In this article he debunks some of the myths, such as load (mis) match in output stages, which is by definition perceived as a bad thing, when that might not be necessarily the case. Another myth example regards the efficiency of a triode output stage versus a pentode.

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

November 24, 2023 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.

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.

Hegel Unveils H600 Dual Mono Integrated Amplifier and DAC

August 3, 2023 by Joao Martins

Hegel Unveils H600 Dual Mono Integrated Amplifier and DAC

Hegel has introduced their reference integrated amplifier. The H600 is rated for 303 watts in 8 ohms, with a damping factor of 4000, and 2 ohms drive capability - core specifications that Hegel considers are key for an amplifier to drive any speaker with confidence and ease. In line with the company's obsession of dual everything, the amplifier is a dual mono design. It also boasts a state-of-the-art preamplifier with the same extremely precise volume attenuator found in the Hegel reference P30A amplifier.

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

June 22, 2023 by Jan Didden

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.

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