Nobsound&reg; TPA3116D2 2.1 Channel Digital Amplifier HiFi Stereo Power Amp Board It's assembled board and tested well,High-quality promised.PCB Size: 84.5X100mm / Net weight: 0.14Kg. Now we want to introduce you our newest preamp B07719G56B, which suits very well for this amp. The amplifier board with two TPA3116D2 digital amplifier chip as the core, one do a left and right channel power amplifier, and the other bridge driver subwoofer, with small size, high efficiency, high power characteristics. Regardless of the cost of materials, capacitors Philips, Thomson, ruby. Taiwan-quality sealed potentiometers, original TPA3116D2 chip, SMD chip devices, and so on. Board circuit is simple, reliable work. 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.