Nobsound&reg; TPA3116D2 Mini Digital Amplifier HiFi 2.1CH Stereo Amp with Power Supply Nobsound NS-08G is an integrated amplifier which adopts two TPA3116D2 digital amplifier core chips,one for left and right channels,another one for subwoofer. High efficiency and high power characteristics with mini size 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. Board circuit is simple, reliable work. Operating voltage 12V-25V. Left and right channel output 50WX2, subwoofer output 100W, efficiency can reach above 90%. All use genuine components using devices capable of long-term stability.