Gio over at diyAudioProjects writes:

This is a small headphone amplifier that I built into a dead external CD-ROM. The enclosure works real well as it already had a switch, inputs and an output. The circuit is a simple single-ended circuit using a small mosfet as the output device. Most importantly, the amp sounds very good!

The site has very detailed instructions for making your own replica of this cleverly-encased amp. Not a bad choice of headphones, either.

Becky Stern

Becky Stern

Becky Stern ( is a DIY guru and director of wearable electronics at Adafruit. She publishes a new project video every week and hosts a live show on YouTube. Formerly Becky was Senior Video Producer for MAKE. Becky lives in Brooklyn, NY and belongs to art groups Free Art & Technology (“release early, often, and with rap music”) and Madagascar Institute (“fear is never boring”).