Bluetooth digital power amplifier board with 2.1channel fidelity sound quality, developed with the latest materials to deliver power and reliable performance. Key benefits power, flexible impedance: left or right channel delivers 300 W into 4 ohms at 50 V, 160 W into 8 ohms at 50 V. Subwoofer channel provides up to 600 W into 2 ohms at 50 V, with 300 W into 4 ohms and 160 W into 8 ohms. Efficient, fidelity sound: 2.1channel configuration supports stereo plus subwoofer for balanced, fullrange audio with clear bass. Robust design with modern materials: built with the latest materials to ensure strong output and durability in Bluetooth applications. Clear relationship between voltage and power: the higher the supply voltage and the lower the impedance, the greater the output power. Specifications and operation Left or right channel power: 300 W @ 50 V into 4 Ω; 160 W @ 50 V into 8 Ω. Subwoofer (mono) power: 600 W @ 50 V into 2 Ω; 300 W @ 50 V into 4 Ω; 160 W @ 50 V into 8 Ω. Power principle note: the higher the voltage, the smaller the resistance, the greater the output power. Working voltage range: 18–50 V DC; maximum limit 53 V. Power supply recommendation: use a DC power supply with voltage in the 36–48 V range. Product features Bluetooth enabled digital amplifier board for wireless audio streaming. 2.1channel configuration for stereo plus subwoofer output. Built with modern materials to support power and reliability. Designed for fidelity audio performance in Bluetooth applications. Use scenarios Home audio systems: connect to a Bluetooth source and drive a stereo pair with a subwoofer for immersive listening in living spaces. Small event or venue setups: power a compact PA or multimedia system with strong stereo channels and a sub for enhanced bass in small to medium rooms. DIY audio projects: suitable for custom speaker builds that require a power 2.1channel amplifier with Bluetooth input and flexible impedance handling. Notes Ensure the DC supply matches the recommended 36–48 V range. The specified output powers depend on load impedance and supply voltage within the stated operating range.