ITEM NAME:DC12-24V TPA3116D2 2.1 Channel Digital Subwoofer Power Amplifier Board+case A2L3 DC12-24V TPA3116D2 2.1 Channel Digital Subwoofer Power Amplifier Board+case A2L3 Chip Type: TPA3116X2 Supply Voltage: DC 12~24 V Channel Type: 3 Channels(Left Channel, Right Channel, Subwoofer) Output Power: 50W*2 + 100W*1 Subwoofer Output Match: 4~8 ohm color:red&clear Material:metal plastic Audio Output: Terminals SNR: 100dB Frequency Response Range: 14~20KHz Switching Frequency: 1.2 MHz PCB Board Size(L*W*H): 100 x 70 x 25 mm 1..Channel Type: 3 Channels(Left Channel, Right Channel, Subwoofer). Output Power: 50W 2 + 100W 1 Subwoofer. 1 x Digital Subwoofer Power Amplifier Board+case. 50W 2+100W 2.1 channels(left/right channel and subwoofer channel), high efficiency and low-heat.