SMAKN Finished board-New subwoofer 2.1 TPA3123 digital power amplifier board for DIY<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Power supply: Voltage:12-24V (Suggest 15V-20V) It's better to use high quality switching power supply.</li><li>The maximum output:Left/Right output: 20WX2 subwoofer output:40W</li><li>Dimension：Width x Dept x Hight(82mm*65mm*30mm) (The dimension do not include the potentiometer handle &amp; other Projecting part)</li><li>Input hole spacing distance of the amp board：2.5mm</li><li>Distance between 2 Potentiometers:5mm</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51Ry%2B%2B9p0-L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Xqu%2Br1WrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41cF-IcBgQL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41fbAZ019aL.jpg" noproxy>