OP+Buffer pre-amp/headphone

[monkey29]

This pre-amp/headphone use OP+buffer, and with source selection.
The volume control by analog or digital potentiometer.

[IMGHTTPDEAD]http://audiomodule.com/images/amp15.jpg[/IMGHTTPDEAD]
[IMGHTTPDEAD]http://audiomodule.com/images/amp15-2.jpg[/IMGHTTPDEAD]