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Inclusive Compensation and Ultra-Low Distortion Power Amplfiers

Author(s): Self Douglas

Two things define the distortion performance of a power amplifier; the open-loop linearity of the circuitry, and the amount of negative feedback that can be safely...

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Self-improvement for capacitors

Author(s): Self Douglas

Audiophiles are often told that their new equipment, components or cables need to be 'broken in' to deliver their best performance. So far, technical backup...

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A low-noise preamplifier with variable-frequency tone controls

Author(s): Self Douglas

In 1996, Douglas Self published a design for what became known as the Precision Preamplifier, which included a treble/bass tone control with variable turnover...

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Optimizing RIAA realization

Author(s): Self Douglas

Douglas Self approaches 'RIAA optimization' from an unexpected slant: which circuit configuration makes the most effective use of the capacitors used, in...

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The Devinyliser

Author(s): Self Douglas

This investigation grew out of a letter that was published in HiFi News at the end of 2015, where Patrick Wallace points out that vinyl signals always come with a...

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Rumble filtering - like you really mean it

Author(s): Self Douglas

‘Rumble’ is actually not a very accurate description. The subsonic signals are not audible in themselves, but the intermodulation they cause in bass units...

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Letter of Marcel van de Gevel to Douglas Self on The Devinyliser (vol 11)

Douglas Self's  artcle on differential rumble cancellers (vol 10) provoked Marcel van de Gevel to try to find low-pass filters that eliminate the need for...

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