27 November 2007

CMoy / Grado RA-1 Headphone Amplifier

Mark is keeping busy on the hobby front and has completed another DIY Audio Project, a battery powered headphone amplifier. His DIY headphone amplifier follows the idea of the very popular CMoy headphone amp which is a basic non-inverting amplifier using an operational amplifier (op-amp). The amplifier circuit is contained on a basic IC protoboard, uses the Burr-Brown OPA2134PA op-amp and is powered by two 9-volt batteries.

CMoy Headphone Amplifier on Protoboard
The idea to house the DIY Headphone Amplifier in a wooden enclosure was taken from the Grado RA1 headphone amplifier which is contained in a beautiful mahogany box.

CMoy Headphone Amp in Wooden Enclosure
Mark is very pleased with the performance of this simple and inexpensive headphone amplifier project. For full details, including additional pictures and the schematic, see the DIY CMoy / Grado RA-1 Headphone Amplifier Project page.

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