All articles
Square-Law class-A: a family of efficient class-A power amplifiers
It is well known that Class-A gives the best sound quality in audio power amplifiers but the efficiency is so low that it is impractical to build much more than...
A flexible 2/4/8 channel remote level control
Project21, described elsewhere by Jean-Claude Gaertner, needed a flexible level control system for up to 4 amplifiers actively-driving speakers in at least 2...
Zen -> Cen -> Sen - Evolution of a Minimalistic IV Conversion Circuit
This article has been inspired by previous work by LC Audio, Leach and Nelson Pass. Patrick was intrigued by the operation of the Leach circuit as a current conveyor...
Simple Loudspeaker Correction Filters
Active filter stages having two (usually complex) poles and two (usually complex) zeroes can be very useful in applications such in active loudspeakers for correcting...
The Ultra-Linear Power Amplifier - An adventure between triode and pentode
TWhen Rudolf Moers discovered tube amplifiers, he could not find a good book that explained various concepts like the Ultra-Linear circuit, from a theoretical as well...
Book review - The Design of Active Crossovers by Douglas Self
Book review - The Design of Active Crossovers by Douglas Self Castor-Perry Kendall (aka The Filter Wizard) reviews Douglas Self's last work The Design of Active...
Book review - Fundamental Amplifier techniques for Electron Tubes by Rudolf Moers
Book review - Fundamental Amplifier techniques for Electron Tubes by Rudolf Moers Vol 2
Guido Tent
Guido presents an extensive review of Rudolf Moers...
Guest Editorial - Digital Audio: Progress, Stagnation and Regression
Guest Editorial - Digital Audio: Progress, Stagnation and Regression Gary Galo Gary offers an insightfull review of the history of digital audio developent from the...
A New Amplifier Topology With Push-Pull Transimpedance Stage
In this article Samuel reviews existing transimpedance stage configurations, and then introduces an amplifier topology which uses a novel push-pull transimpedance...
SIT Nemesis!
In Linear Audio Vol 0, Nelson Pass paid tribute to the classical single-ended transformer-coupled triode amplifier with the Arch Nemesis. Inspired by Jean Hiraga'...