Nobsound&reg;Latest upgrated 2.1 digital power amplifier board TPA3116D2 50W+50W+100W 12V-24V The amplifier board with two TPA3116D2 digital amplifier chip as the core. PCB Size: 84.5 * 100 mm / 3.52 * 3.94 in; Net weight: 0.14 Kg / 0.31 lb One do a left and right channel power amplifier, and the other bridge driver subwoofer, with small size, high efficiency, high power characteristics. Operating voltage 12V-25V. Left and right channel output 50WX2, subwoofer output 100W, efficiency can reach above 90%. You can use the laptop switching power supply, also very suitable for battery-powered devices, such as motorcycles, cars, electric cars, etc. Compact board, use and installation are very flexible and convenient. All use genuine components using devices capable of long-term stability.