​Features:Adopts two high quality TPA3116D2 digital amplifier chips.Sound quality is very good, high efficiency and amplifying power.50Wx2+100W  2.1 channels(left/right channel and subwoofer channel), high efficiency and low-heat.Powered by DC 12-24V, wide input voltage.User can adjust the volume by themselves easily.Applicable speaker impedance: 4-8 ohm.Just connect the power supply and loudspeaker box, enjoy the pure digital music!Notice:This amplifier board must be powered by DC power(DC12-24V), it's better to use high-performance switch power. Don't use transformer!Specifications:Supply Voltage: DC 12-24VChip: TPA3116D2 x 2Channel Type: 3 Channels(Left Channel, Right Channel, Subwoofer)Output Power: 50W x 2 + 100W x 1 SubwooferOutput Match: 4-8 ohmAudio Output: TerminalsFrequency Response Range: 14-100KHzSNR: 100dBSwitching Frequency: 1.2MHzPCB Board Size: 10.0 x 7.0 x 3.0cm / 3.94 x 2.75 x 1.18in (L x W x H).Package Included:
1 x 2.1 Channel Audio Amplifier Board
NO Retail Box. Packed Safely in Bubble Bag.