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June 13, 2005

Build a cheap portable amplifier

Ever needed to amplify a weak audio signal while on the road? You might try Chu Moy's portable design which can run on 9-volt or NiMH batteries:

Chu Moy designed a very popular headphone amplifier that's easy to build, and it can be built small enough to fit in a pocket, power supply and all. It's powerful enough to drive very inefficient headphones to thunderous volumes from even weak sources, and it sounds excellent considering that you can build a bare-bones CMoy amp for just US$20, and a pretty nice amp for under $50. Considering that the cheapest of the worthy commercial amps is $100 and most of them are in the $200+ range, this is a very worthwhile cost difference.

Posted by Beau Gunderson at June 13, 2005 1:04 PM

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