Bluetooth 5.0 50W+50W+100W 2.1 Channel Subwoofer Amplifier Board Tpa3116D2 Hifi TPA3116D2 HIFI chip solution: stereo dual-channel output, 50W+50W+100W, to ensure continuous serial high-power operation, THD ?0.1%. Using high-quality filter inductors, the sound is full and clear. Bluetooth and AUX audio input: Bluetooth 5.0 version, higher transmission efficiency and longer distance. If your playback device does not have Bluetooth, you can also input audio signals through the 3.5MM jack; Safety protection: The power amplifier board has overheat protection, reverse connection protection, circuit breaker protection, overvoltage and undervoltage protection; wide voltage input DC: 12-24V. Features copper DC connectors and barrier terminals. It can withstand high current, does not generate heat, and does not damage the wire. The free DC head lead is compatible with the input power interface of this product, even if you don't have a DC head adapter, you can easily wire it. Independent high and low bass control knobs, easy to adjust the volume, allowing you to experience theater-like sound effects. With its excellent performance and comprehensive cost performance, TDA3116D2 is widely used in home theaters, square speakers, etc.