The amplifier board with two TPA3116D2 digital amplifier chips is used to drive stereo speakers and efficient digital amplifier power stage for the driving power mono mode is up to 100W / 2?. Besides this board shares a wide range of applications like small-miniature components,speakers,docking base, automotive aftermarket, cathode ray tube TV, consumer audio applications and so on. About its core, one is to do a left and right channel power amplifier, and the other is to be bridge driver subwoofer with small size, high efficiency and high power characteristics. With left and right channel output 50WX2, subwoofer output 100W, efficiency can reach above 90%. Moreover you can use switching power supply and laptop is very suitable for battery-powered devices such as motorcycles, cars, electric cars, and so on.