Item Type: Power Amplifier Board_x000D_Material: Synthetic cardboard_x000D_Purpose: Subwoofer power amplifier_x000D_Dual AMP Chip TPA3116D2_x000D_Maximum Output Power: 2 x 50W + 100W_x000D_Power Supply: DC12~24V_x000D_Channel: 2.1_x000D_Efficiency: 90%_x000D_Output Impedance: Left/right 4-8 ohms, low 2-8 ohms_x000D_Audio Input: Bluetooth / AUX / 3P_x000D_Bluetooth Version: 5.0_x000D_Work Type: Class D 1100W subwoofer amplifier board, Bluetooth 5.0, frequency response range: input: 20Hz-20KHZ, output: 20Hz-180Hz. 2Operating voltage range: DC 12-24V (the maximum voltage does not exceed 24V). 3This bass amplifier board has bass volume potentiometer control and built-in TPA3116 amplifier chip. 4The subwoofer power amplifier module has a wide operating voltage, energy-saving design, and a power efficiency of over 90%. 5This power amplifier board supports up to 100W bass channel output, audio input sensitivity: 500 mv.1 xAmplifier 5 xGasket 5 xNut 4 xScrew 4 xBrass Column 5 xKnob 1 xConnection Line