D.I.Y.
MUSIC
Photography by Warren Young
Your MP3 player’s music will sound minty fresh when played through this li’l headphone amp.
MINT-TIN AMP
Pocket amplifier punches up headphones. By Warren Young
Headphone amps make portable listening good and loud. Commercial audiophile models can cost $200+, or you can build a great-sounding amp inside a mint tin for around $30, following Chu Moy’s popular design. Powered by a 9-volt battery, this amp drives high-impedance headphones to thunderous volumes from even weak sources.
To make one, you need an op-amp chip (like the TI/Burr-Brown OPA132), capacitors, resistors, an LED, and a small prototyping ...
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