2.1channel Bluetooth digital amplifier with dualcore TPA3221 chips. Output configuration is 100W per channel for two main channels plus 200W for a subwoofer channel. Includes a built in power switch. Uses low loss components to deliver clearer sound and easier tuning of and low frequencies. Dualcore design with two TPA3221 amplifier chips provides stable operation, efficiency, and low power consumption. The TPA3221 power core offers definition sound quality and a comprehensive protection mechanism to safeguard the system. Quality first, exquisite materials. Built with care to ensure reliable performance and longlasting use. Key benefits and features Function: 2.1 channel amplification with Bluetooth input, capable of driving speakers and a subwoofer for rich, roomfilling sound. Compatibility: Bluetooth enabled input connects with smartphones, tablets, and other Bluetooth sources; designed to work with standard passive speakers via conventional speaker outputs. Tuning and control: Adjustable and low frequency response for convenient tailoring to room acoustics and preference. Performance: power outputs (100W per main channel and 200W for sub) with efficiency, low distortion, and robust protection features. Convenience: Built in power switch for straightforward on/off operation; use as a simple upgrade for existing audio setups. Practical use scenarios Living room stereo system: pair a Bluetooth source (phone, tablet, or laptop) with two bookshelf speakers and a subwoofer to achieve strong, balanced stereo sound with enhanced bass. Home theater or desktop PC setup: connect to a TV or computer audio source to boost dialogue clarity and music, while adding subwoofer depth for movies and games. DIY speaker project or upgrade: integrate into a custom speaker arrangement to upgrade Bluetooth streaming and overall sound quality without changing existing speakers. Overall, this amplifier combines powerful 2.1 channel performance with Bluetooth convenience, reliable dualchip design, and thoughtful tuning options, all in a build that emphasizes quality materials and durability.