This is the bare PCB for a robust 50W power amplifier with reference to the legendary Naim 140 power amplifiers. The resulting amplifier is a very dynamic one, extremely good for music performance of every sort. This is an auction for 1 pieces of PCB. Each PCB consist of one channel of amplifier. It requires two to form a stereo amplifier. We provide schematics to the buyers. We do air shipping worldwide at US$4.50.