Previously Featured Builds

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Mario Ninic

Mario Ninic

The Zen lightenment amplifier from Zen variations-part 1 (page 2 fig.5) I am using 2 300w Sylvania light bulbs (one… More...
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Mario Rada

Mario Rada

This is just a brief description of my pass projects recently finished. Two monoblocks A1.2, each built in a cabinet… More...

Miscellaneous Projects — Webmaster / 2013

Here are some great project-submissions folks wanted to show-off.  They don't directly correspond with a single PassDIY project, but we still fealt like they should have a home.  Great work everyone!  More...

Zen Variations 1 — Nelson Pass / 2001

As an exploration into the potential performance of a very simple amplifier, the Zen amplifier has succeeded in creating notoriety and some controversy over the last 8 years. More importantly, it's novel and simple construction appears to have encouraged a large number of doit- yourselfers to take up a soldering iron and jump in. Having only a single gain device, the design's name is a pun on the Zen Koan, "What is the sound of one hand clapping?", but the point is quite serious. High quality sound can be obtained with simple and accessible circuits. Conversely, it is quite easy… More...

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