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Andrzej Sochon

Andrzej Sochon

Dear Sir, I am 55. I made two Son of Zen monoblocks in the summer of 1999, output power is… More...
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W. Sankey

W. Sankey

The first thing I want to do is thank Nelson Pass and the rest of the crew at Pass Labs… More...

Construct a Class - A Amplifier — Nelson Pass / 1977

Most audio power amplifiers use class A circuitry except in the drive and output stages, where they use class B or AB operating modes to achieve high efficiency. In class B and AB modes, the output stage operates in a pushpull configuration, where one set of output devices delivers positive voltage and current and another set delivers negative voltage and current. When one set is working, the other set is turned off. This scheme operates efficiently, but has two serious flaws, the extremely nonlinear characteristic of the transistors at the collector cutoff region and the turn-on/turn-off times of the devices.… More...

Amp Camp Project — Pass DIY / 2016

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