The most perfect 2.1 digital amplifier board. 2014.8.20 latest upgrated version (but the price we offer is same with the old version, without any price increase）. Gain (magnification) has been promoted to 36DB, so you can match the small output level cellphone can do full power output. Product Description: 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 potentiometers sealed, original TPA3116D2 chip, SMD chip devices, and so on. Board circuit is simple, reliable work. Operating voltage 12V-25V. Compact board, use and installation are very flexible and convenient. All use genuine components using devices capable of long-term stability. Operating voltage: 12V-25V (recommended to use high-quality switching power supply) Power output: 100W subwoofer left and right channel 50Wx2 Dimensions: 83X100MM Three knob from left to right: 1. Stereo sound volume. 2. Subwoofer frequency regulation. 3. The subwoofer volume Package Included: 1 x Digital TPA3116D2 2.1 HIFI Subwoofer Amplifier Board 50W+50W+100W Beyond LM1875
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