Professor M.J Hawksford (joint founder of LFD): Low-frequency sound source localization as a function of closed acoustic spaces

Further development of an emerging generalized theory of low-frequency sound localization in closed listening spaces is presented that aims to resolve the ambiguities inherent in previous research. The approach takes a robust set of equations based on source/listener location, reverberation time and room dimensions and tests them against a set of evaluation procedures to explore […]

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The Single-Ended Amplifier: Cary’s Dennis Had

Robert Harley (Stereophile magazine) writes:  Cary Audio Design founder Dennis Had is largely responsible for popularizing single-ended amplifiers in America. Since appearing on the scene in 1989, Cary Audio Design has forged its own niche in the high-end audio industry. I spoke with Dennis Had about how he got started building amplifiers, and why he’s […]

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High-End Survivor

Stereophile write: “I don’t believe it!” I had just unplugged my preamplifier from the PS Audio Power Plant P300 and powered it from the wall socket, and was reacting to the resultant “grayness” that had been reimposed on my music. We seem to be more sensitive to hearing subtle but ultimately important sonic effects when […]

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Audiophile interview: Chris Connaker – computeraudiophile.com

Laurence A. Borden writes: LB: Chris, welcome to Dagogo. Please begin by telling us about your background, and what lead you to embrace computer-based audio and to start computeraudiophile.com. Chris Connaker: I have been an audiophile for as long as I can remember. In 1982, after talking my second grade teacher Mrs. Van de Weigh […]

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HIROYASU KONDO: Founder of Audio Note Japan, and a legendary figure in his own time—took …..

Stereophile write …… Our interview with Hiroyasu Kondo—founder of Audio Note Japan, and a legendary figure in his own time—took place during HI-FI ’96 last June at the Waldorf=Astoria. It seemed very natural; the crowd at the Show was very internationalist. Herb Reichert of Audio Note New York found us a quiet corner after lunch, […]

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Speaker Design Guru David Smith

Rahul Athalye (TNT-Audio ezine) writes: TNT-Audio caught up with noted speaker designer David Smith, ex-JBL, McIntosh, KEF, Snell, and PSB. Join TNT and Speaker Dave on a journey into the heart of speaker design, its history and current trends. Rahul Athalye (RA):Tell us about how you got started in the audio business. David Smith (DS): […]

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Howard Popeck speaks at length to people with interesting things to say: Mr. Dominique Mafrand, the driving force behind French audio maker l’enceintebleue

Hello Dominique. How did your interest in music reproduction start? It began when I was very young. One of my four brothers studied electronics at school and found a job in a French company called Ferisol manufacturing professional electronics equipment for the industry. It was back in 1960/1965. It was the beginning of pop music […]

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Howard Popeck speaks at length to people with interesting things to say: Metaxas & Sons SOLITAIRE 2016 amplifier – Redefining what an amplifier can look like in Hi-End Audio

First published in early 2016 Howard Popeck: Hi Kostas. Unusual design, to say the least. What’s led to this? Kostas Metaxas: Hi Howard. After 40 years of creating audio equipment, the last thing that I wanted to produce was “another box with transistors on a heatsink”. I was dreaming of the most spectacular architecture, design […]

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SOLEDGE: Howard Popeck speaks at length to people with interesting things to say: Mr. Raphaël Bini, the driving force behind French audio maker Soledge High End Wireless Audio System.

Hello Raphaël. How did your interest in music reproduction start? Well, I suppose everything starts with music listening during as a youth, with a father playing music, either on a piano or guitar, or on his HiFi system. Then, my father being an electrician and repairing TV sets, meant that I grew up with electronic […]

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Professor M. J Hawksford (joint founder of LFD): Audio Amplifier Systems, A Compilation

This document is a compilation of technical papers relevant to both analogue and digital audio amplifiers and related systems. Topics include error correction, voltage-controlled amplifiers, current drive, current-to-voltage conversion and PWM. Emphasis is given to circuit techniques that include novel forms of distortion reduction. Audio Amplifier Systems, A Compilation (PDF Download Available). Available from: https://www.researchgate.net/publication/312557447_Audio_Amplifier_Systems_A_Compilation […]

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Howard Popeck listens to people with interesting things to say: Bob Rapoport – the public face (and a lot more besides) of Essence Electrostatic Speaker Systems

  HP’s introduction: More often that not, I go straight into posting the interview without too much, if any history. However in order to avoid confusion and to minimise misunderstand, I’ve lifted this maker’s history from their site. Here it is – and please take time to read because it is relevant. Thanks. Company history: […]

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LFD AUDIO: Dr. Bews’ design philosophy

Hi Howard. You have ended up only selling LFD amps. What makes them so special and what is their design philosophy please. And no jargon please if you can. Thanks. Ralph. Dr. Bews reply: LFD Audio believe that audio Amplifiers can be most easily optimized if the basic amplifier topology is kept as simple as […]

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HELIUS: The evolution of tonearm design and consider aspects of various designs that most influenced my approach to Helius

Geoffrey Owen – head of Helius Designs writes: In this episode I’m going to discuss the evolution of tonearm design and consider aspects of various designs that most influenced my approach to Helius. My own hi-fi journey started with the most classical of 1970’s choices – an SME 3009 mounted on a Thorens TD125 MKII […]

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Re bi-wired speakers, how important is the type of jumper? Dr Richard Bews responds

Recently I wrote: This started way back at Subjective Audio in the 1980s I played music for the staff on our reference system, then going around to the rear of the speaker, making a quick ‘mystery’ change they all noticed for the better. What I did was simple; I moved the speaker cables from the […]

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PIERRE LURNE: Design Philosophy For Turntables – a paper from Pierre Lurne Of Audiomeca

Enjoy The Music write ….. For those who are unfamiliar with his name, Pierre Lurne has been an integral part of cutting edge turntable design since the late 1960’s. Pierre designed his first arm design in 1968. He later was commissioned to do design work for a then major player in the audiophile turntable market. […]

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AUDIO RESEARCH: Meet Your Maker: Hi-Fi+ Visits Audio Research Corporation

Chris Martens: Reviews of products from the US-based firm Audio Research Corporation have frequently graced the pages of Hi-Fi+, so that I was pleased to have the opportunity to visit the ARC factory in Plymouth, Minnesota (a suburb of the greater Minneapolis metropolitan area) to see how the firm’s components are made. What follows is […]

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Nelson Pass – The Patents Of Pass

Brian Damkoroger: If high-end audio were to carve its own Mt. Rushmore, whose faces would appear there—besides that of Stereophile founder J. Gordon Holt, of course? It’s likely that no two audiophiles would ever come up with identical lists of subjects, but I wouldn’t be surprised if they could agree on at least one name: […]

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Tim de Paravicini – The Stereophile star interview

Originally published October 2009 Stereophile: You are president of Esoteric Audio Research, a British manufacturer of tube amplifiers, and a world-renowned designer of tube equipment and output transformers. I thought we’d begin with a little background. Where were you born? What kind of education did you get to prepare you for a career in audio? […]

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James Boyk: All-Tube Analog

Originally published July 2010 Stereophile write: It is a widely held belief that musicians do not assess hi-fi equipment in the same way as “audiophiles.” I remember the British conductor Norman Del Mar—an underrated conductor if ever there was one—still being perfectly satisfied in 1981 with his 78 player, never having felt the need to […]

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PIERRE LURNE: Interview

Geoff Husband (TNT-Audio ezine) writes: One of the joys of doing my series of turntable tests has been discovering the enthusiasm that seems universal with anyone connected with vinyl. One person stands out and that is Pierre Lurné of Audiomeca. This man has been deeply involved in vinyl reproduction for well over 30 years now […]

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