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Simple Loudspeaker Correction Filters

Author(s): Gevel Marcel van de

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...

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A Tube based Phono Preamplifier

Author(s): Gevel Marcel van de

Since noise is always a very important factor in phono preamp designs, Marcel gives it much attention. He compares several tubes in this regards, giving methods for...

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BVA review

Author(s): Gevel Marcel van de

Building Valve Amplifiers, Morgan Jones Vol 7 Marcel van de Gevel Marcel van de Gevel checks out the 2nd edition of Morgan Jones' Building Valve Amplifier, and...

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Grammophone preamplifier noise calculations - the 3852 Hz rule revisited

Author(s): Gevel Marcel van de

Gramophone preamplifier noise calculations – the 3852 Hz rule revisited      Vol 8

Marcel van de Gevel

The noise of an...

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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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The valve DAC - Submicron silicon meets submillimetre vacuum

Author(s): Gevel Marcel van de

Despite the increasing popularity of gramophone records, many recordings are still only distributed digitally. This must be frustrating to those audio...

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