DROKxae; TPA3123 Class D Digital Subwoofer Amplifier 2.1 Channel Amp DIY Board<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> This amplifier board with 2*TPA3123 digital amplifier chip， one for left and right channel power amplifier， one for bridge driver subwoofer， Left and right channel output 20W*2， subwoofer output 40W， efficiency can reach above 90%， small size， efficient， high-power. can use laptop switching power supply or battery-powered devices， such as motorcycles， cars， electric cars and etc. </span></li><li><span class="a-list-item"> Powered: DC 12V-24V (voltage suggested: 15V-20V， high-quality switching power supply) </span></li><li><span class="a-list-item"> Maximum output: left and right channel 20W*2， subwoofer 40W </span></li><li><span class="a-list-item"> Size: 82mm * 65mm </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51QKryrYeeL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51Ifxy9PjFL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61JuTQgVo9L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51%2BRTRoRaSL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51GSXGRSCnL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51Z0m-A9hyL.jpg" noproxy>