Features Wide Range of Applications: TPA3116D2 high-performance power amplifier chip is used. DC12-24V wide supply voltage, suitable for various audio applications. Good Sound Quality: Left/right channel + subwoofer channel, excellent sound quality. It is a very good DIY accessory, and it can also perfectly replace your broken subwoofer effect board. Material: High quality double-sided circuit board, anti-aging, high temperature resistance. With overheat protection, circuit protection, overvoltage and undervoltage protection. Easy to Use: Easily adjust the volume with the potentiometer. Easy to use and more convenient to install. Our mounting accessories are enough for you to install our amplifier board. Tip: When the audio input is sufficient and the power supply voltage/current is sufficient, sufficient output power is required, and the relative power will be higher. Speakers with different impedances will produce different output power. In the case of sufficient voltage and current, the larger the impedance of the speaker, the smaller the relative sound power, please pay attention! Features: 1.Adopt TPA3116D2 high performance power amplifier chip. 2.Left/Right Channel + Subwoofer Channel, excellent sound quality. 3.DC12-24V wide power supply voltage, suitable for various audio applications. 4.High quality double sided circuit board, anti-aging and high temperature resistant. 5.Easily adjust the volume with the potentiometers. Specification: Supply Voltage: DC12-24V Output Power: 50Wx2 + 100W Subwooferx1 Output Load: 4-8Ω Frequency Response Range: 14-100KHZ Number of Channels: 3 (Left Channel + Right Channel + Subwoofer) Switching Frequency: 1.2MHZ Package List: 1 x Amplifier Board 3 x Knob Cap 3 x Gasket 6 x Nut 3 x Screw Package List