Key benefits Flexible DC power operation: works with DC 1224V supply (maximum voltage no more than 24V), suitable for car audio and lowvoltage projects. Efficient performance: powersaving design with more than 90% power efficiency, reducing heat and battery drain. Integrated control and processing: builtin TPA3116 amplifier chip with a preamplifier function and frequency processing, including a volume potentiometer for onboard adjustment. Subwoofer optimized output: up to 100W per channel output with a frequency range geared toward bass and sub frequencies, enabling clear lowend performance. Specifications Operating voltage range: DC 1224V (maximum 24V) Amplifier: builtin TPA3116 amplifier chip Function: preamplifier with frequency processing and volume potentiometer control on the amplifier board Power efficiency: greater than 90% Maximum output: up to 100W per channel Frequency response: input 20 Hz to 20 kHz; output 20 Hz to 180 Hz Audio input sensitivity: 500 mV Speaker impedance: 2 to 8 ohms Use scenarios Car audio system upgrade: integrate with a vehicle's 12V electrical system to enhance bass performance for a more impactful subwoofer setup. DIY home theater or compact subwoofer project: connect to an AV receiver or audio source to reproduce tight, lowfrequency effects in a small living space. Custom speaker builds and arcade or multimedia enclosures: suitable for projects requiring a compact subwoofer amplifier with onboard preamplification and frequency processing.