On list is a partial kit of a SUPER heavy duty DC power supply, design for pure class A MOSFET amplifier or other high power amplifiers. This board can be used for one channel or two channels. For exotic requirement, one power supply board should be used for one stereophonic channel. The kit includes : - twp pieces of IRF 250JB6L ( 600V 25A) bridge rectifiers ; - two pieces of highly reliable Epcos ( Siemens) MKP 1uF for decoupling ; - two 3mm LED for power indication ; - high quality thick PCB ( 2mm thick, 75um copper thickness) ; PCB dimension : 178mm x 101mm. We do air shipping worldwide at US$5.30.