Feature:1. [Multi Functional] Digital sound amplifier board is a subwoofer power amplifier board with preamplifier, bass crossover, bass volume potentiometer control. Suitable for DIY speakers.2. [Professional] Power amplifier board has a high performance digital power amplifier chip based on for TI TPA3116D2. Perfect for professionals who already own a 2.0 amplifier.3. [Efficient] Amplifier module adopts DC 1224V power supply, wide operating voltage, power saving, and the efficiency is as high as 90%. Supports bass channel output up to 100W (Bass).4. [Multi Applications] Amp board for switching power adapters with good performance, notebook switching power supplies, rectifier filter transformer power supplies, charging or vehicle power supplies, etc.5. [Stable Performance] Digital sound power amplifier module adopts high quality PCB materials and components to ensure stable performance. Easy to install and use.Specification:Item Type: Amplifier BoardMaterial: PCBInput Voltage: 12-24VOutput Power: 100WInput Frequency: 20Hz-20KHzOutput Frequency: 20Hz-180HzSound Input Sensitivity: 500mVSubwoofer Impedance: 2-8.Package List:1 x Amplifier Board1 x Adapter Cable2 x Knob Cover2 x Gasket2 x NutNote:1. The output power is related to the power supply voltage, speaker impedance, and sound source input size. Usually the higher the supply voltage, the higher the output power supported.2. Speakers with different impedances can support different output power. Typically, speakers have less power and are easier to implement.3. Components may vary slightly from batch to batch, but functional performance remains the same.