This is the PCB of a stereo preamplifier using only a single MOSFET per channel, reference to ZEN preamplifier. This minimalist circuit provides superb transparency that can excel most of the other preamplifier circuits. PCB dimension: 152mm x 101mm. PCB thickness: 1.6mm. T Copper thickness : 75um ( four times normal thickness !) This PCB serves both the left and right channels. The board includes rectifier and regulator circuitry. It only need to feed in an AC 60V 80mA to function.We do air shipping worldwide at US$5.00.