The amplifier board adopts two high quality TPA3116D2 digital amplifier chips as the core? one ad left and right channel power amplifier? the other as pre-bridge driver with NE5532 subwoofer? which makes it features small size? high efficiency and high power.<br /><br />Features:<br />Adopts two high quality TPA3116D2 digital amplifier chips.<br />Sound quality is very good? high efficiency and amplifying power.<br />50W*2+100W 2.1 channels(left/right channel and subwoofer channel)? high efficiency and low-heat.<br />Powered by DC 12-24V? wide input voltage.<br />User can adjust the volume by themselves easily.<br />Applicable speaker impedance: 4-8 ohm.<br />Just connect the power supply and loudspeaker box? enjoy the pure digital music!<br /><br />Notice:<br />This amplifier board must be powered by DC power(DC12-24V)? it&#39;s better to use high-performance switch power. Don&#39;t use transformer!<br /><br />Specifications:<br />Supply Voltage: DC 12-24V<br />Chip: TPA3116*2<br />Channel Type: 3 Channels(Left Channel? Right Channel? Subwoofer)<br />Output Power: 50W*2 + 100W*1 Subwoofer<br />Output Match: 4-8 ohm<br />Audio Output: Terminals<br />Frequency Response Range: 14-100KHz<br />SNR: 100dB<br />Switching Frequency: 1.2MHz<br />PCB Board Size: 100 * 70 * 30mm / 3.94 * 2.75 * 1.18in (L * W * H)<br />Weight: 113g / 3.98oz<br />Package Size: 13.5 * 11 * 5cm / 5.31 * 4.33 * 1.97in (L * W * H)<br />Package Weight: 167g / 5.9oz<br /><br />Package List:<br />1 * 2.1 Channel Audio Amplifier Board<br />1 * Audio Cable<br><img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-obMS.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-0xXh.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-g7DY.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-dtnN.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-3z1e.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-nZPB.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-efyZ.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-mIrK.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/E/2/E1242/E1242-1-3994-F9fY.jpg" /><br>