2channel Bluetooth digital power amplifier board built with the latest materials for power and fidelity sound. Key features 2channel Bluetooth digital power amplifier with fidelity sound quality Uses advanced materials for durable performance Compatible with a wide DC voltage range and multiple speaker loads Suitable for stereo playback and subwoofer applications Electrical and performance specifications Working voltage range: 18 to 50 V DC Maximum voltage limit: 53 V DC Recommended DC power supply: 36 to 48 V with a current of 12 A Left or Right channel output: 300 W at 50 V with 4 ohm load 160 W at 50 V with 8 ohm load Subwoofer maximum power: 600 W at 50 V with 2 ohm load 300 W at 50 V with 4 ohm load 160 W at 50 V with 8 ohm load Power relationship note: The higher the supply voltage within the specified range, the lower the effective impedance and the greater the output power Functionality and compatibility Bluetooth wireless input for convenient streaming Digital amplification for efficient operation and reduced distortion Supports multiple speaker impedances: 2 ohm (subwoofer), 4 ohm, and 8 ohm Designed to operate within 18–50 V DC, with a safe upper limit of 53 V Materials and construction Built with the latest materials to support power performance and reliability Physical characteristics Size and mounting details are not specified in the available specifications Use scenarios Scenario 1: Car or vehicle audio upgrade Use a 36–48 V DC supply around 12 A to drive a twochannel setup with a subwoofer for enhanced bass and overall audio clarity Scenario 2: DIY powered speaker or small venue PA Employ Bluetooth input for wireless source and drive 4 ohm or 8 ohm speakers, with optional subwoofer for deeper bass in a compact configuration Scenario 3: Home theater or desktop audio system Integrate as a fidelity stereo amplifier with a subwoofer, using the 2 ohm, 4 ohm, or 8 ohm load options to match speaker impedance and desired bass output Notes Ensure the power supply voltage remains within the specified 18–50 V range (not exceeding 53 V) For maximum bass output, use higher supply voltages within the specified range while maintaining safe operation for all connected speakers This description preserves the original specifications and functional intent while presenting clear, customerfriendly information in concise bullet formats.