Electrical requirements and recommendations Working voltage range: 18 50 V DC. Maximum limit: 53 V DC. Power supply suggestion: use a DC power supply in the 36 48 V range with a current capability of 12 A. Product design and performance Built with the latest materials to develop a power Bluetooth digital power amplifier board 2.1 channel configuration delivering fidelity sound quality Output capabilities Per channel (left or right): 300 W at 50 V into 4 ohms; 160 W at 50 V into 8 ohms Subwoofer (maximum power): 600 W at 50 V into 2 ohms; 300 W at 50 V into 4 ohms; 160 W at 50 V into 8 ohms Note: In general, higher supply voltage with lower impedance yields greater output power Use scenarios Off grid or solar powered audio systems for outdoor events or remote locations, using a 36 48 V battery bank Home theater or studio monitor setups powered by a dedicated 36 48 V DC supply for enhanced bass and overall fidelity Small to medium scale public address or performance installations driven from a stable 50 V DC distribution system Function, compatibility and performance highlights Function: Bluetooth digital amplifier board with 2.1 channel fidelity output Compatibility: designed for 18 50 V DC operation with a 36 48 V, 12 A recommended supply Performance: power output across multiple impedance loads, suitable for demanding speakers and subwoofers Materials: constructed with the latest materials for durability and sound quality Size and form: compact amplifier board suitable for integration into 2.1 channel configurations