The amplifier board adopts high quality TPA3116 NE5532 digital amplifier chip as the core. Output power: 50W+50W+100W subwoofer? making it features high efficiency and high power.<br /><br />Features:<br />Adopts high quality TPA3116 NE5532 digital amplifier chip.<br />Sound quality is very good? high efficiency and amplifying power.<br />Whole sealing dust-proof potentiometer? stable performance and durable for use.<br />Adopts red ring high current inductor? ensuring the sound silvery and clear.<br />50W*2+100W 2.1 channels(left/right channel and subwoofer channel)? high efficiency and low-heat.<br />Powered by DC 18-24V input voltage.<br />User can adjust the volume by themselves easily.<br /><br />Specifications:<br />Supply Voltage: DC 18-24V<br />Max. Output Current: 4A<br />Static Current: 50mA<br />Chip Type: TPA3116 NE5532<br />Channel Type: Left Channel? Right Channel? Subwoofer<br />Output Power: 50W*2 + 100W*1 Subwoofer<br />Output Match: 4-8 ohm<br />Frequency Response: 20Hz to 20KHz<br />Efficiency: 90%<br />PCB Size: 100 * 83mm / 3.94 * 3.3in<br />Product Weight: 121g / 4.28oz<br />Package Size: Approx. 15.5 * 11 * 3cm / 6.1 * 4.33 * 1.2in<br />Package Weight: 124g / 4.4oz<br /><br />Package List:<br />1 * Digital Amplifier Board<br><img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-97dh.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-R8l7.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-tKgX.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-16QX.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-g0DS.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-V9lO.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-iBYG.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-rfHd.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-tWnB.jpg" /><br>$$<img src="http://img.tomtop.com/product/xy/2000/2000/p/gu1/E/4/E1144/E1144-1-2ac2-ZFmk.jpg" /><br>