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A Headphone Buffer/Amp and Auto-EQ for Headphones
If you are looking for that ultimate headphone replay amplifier, you couldn't do any better than with this discrete circuit. Richard Marsh develops his circuits...
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How Discrete Signal Interpolation Improves Digital-to-Analog Conversion
Digital Interpolation is a way to reduce complexity and requirements for post-DAC analog filtering. Richard Lyons shows not only how it is done, but also discusses...
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Audible tweaks that cannot work
Audible tweaks that cannot work Vol 3
Richard Burwen
Burwen In his Guest Editorial, Richard Burwen confronts that age-old question: how is it that...
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Audio design is moving forward – or is it?
With all our focus on individual designs and equipment and trying to improve our amps and speakers, it is easy to lose sight of the big picture. Stan Curtis, who has...
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Correcting Transducer Response with an Inverse Resonance Filter
Steven van Raalte set out to combat the resonance in phono cartridges. Manufacturers often rely on this resonance to compensate for the hf roll off caused by...
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Design Considerations for a Class-A Amplifier Enclosure
Many class-A amplifiers are placed in a largish enclosure with heatsinks that ‘look about right’. But, just as with the electronics involved, you can...
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The case for subjective listening tests
The case for subjective Listening Tests Hans van Maanen In his Guest Editorial, Hans van Maanen argues that although in theory decisions for audio development should...
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The “Terrible Twins” – a push-pull amplifier with solid state pentodes
Inspired by Nelson Pass' work with Static Induction Transistors, and Lennart Jarlevang's experience with the PASS-SIT-1 in a single-ended configuration...
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VinylTrak – A full-featured MM/MC phono preamp
After spending many years to write an encyclopedic tome on audio power amplifier design, Bob Cordell decided to turn his considerable talent to the design of a phono...
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A comparative overview of power supply regulator designs with listening tests
Power supply regulators for low power audio circuits have always been a source of controversy. Although technically almost flawless, there have been persistent...
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