DIY Headphone Amplifier - CD Drive Stealth

Filed under: Headphones > Amplifiers



Giovanni Militano just put up his newest creation on DIY Audio Projects, a DIY Class A MOSFET Headphone Amplifier that is housed inside of an external CD drive case. Estimate of the total parts cost is about $20.

In his words, "This is a simple do-it-yourself (DIY) headphone amplifier project that is fashioned primarily after the Class A MOSFET Headphone Driver project by Greg Szekeres and to some extent Mark's DIY Class A 2SK1058 MOSFET Amplifier Project. The amplifier concept is simple and follows a typical single-ended class A circuit utilizing an active constant current source (CCS) in place of a passive resistor. A CCS doubles the efficiency of the circuit over that where a passive load resistor is used, bringing it to a maximum of 25%."

Of course if you wanted, you could use a one of the many custom cases available to make it look like a more expensive piece.