This is an sale of the bare PCB of the Walt Jung's super diamond buffer. The board includes a low noise low impedance regulator circuitry based on kubota type regulation. The buffer can be used as a unity gain stage after the CD signal source or preamplifier for enhancing the driving capability and improve the dynamic response. It can also be used after the normal opamp in a circuitry to supercharge the opamp performance. We provide schematics and part list to the buyers by email. The board contains one channel only. For stereo application two boards are required. PCB thickness : 2mm. Copper thickness : 2 ounce ( 70um)! PCB dimension : 120mm x 90mm. We do air shipping worldwide at US$5.50.