Previously Featured Builds

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Spencer Cheung

Spencer Cheung

This is my first project of your design after reading so much information in Pass DIY wedsite. First, sorry no… More...
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Larry Wright

Larry Wright

Hi Nelson: Here are some photos of my recently finished ZenV4. It sounds great! I built my first amp in… More...

Zen Variations 2 — Nelson Pass / 2002

Welcome back to the Zen Amp Variations. This is part 2 of many parts in which we explore some of the ways to make a very simple audio amplifier. In this and parts 3 and 4 we will embellish upon the original Zen amplifier circuit, improving the performance and creating the Penultimate Zen Amp. You may recall that the Zen Amp is a single MOSFET transistor operated in what is known as Common Source mode in which the input signal is fed to the Gate pin, the Source pin is grounded, and we take the output signal off the Drain.… More...

Amp Camp Project — Pass DIY / 2016

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