ZK-TB21 Bluetooth 5.0 Subwoofer Amplifier Board 50WX2+100W 2.1 Channel Power Audio Stereo

Stereo dual-channel output, to ensure continuous serial high-power operation, THD 0.1%. Wide voltage input DC: 12-24V. Bluetooth 5.0 version, the transmission distance is longer. The transmission distance can reach 49 feet in an open environment. If your playback device does not have Bluetooth, you can also input audio signals through a 3.5MM headphone plug. This power amplifier board has overheat protection, reverse connection protection, circuit protection, overvoltage and undervoltage protection. 2.1 channel power amplifier module can provide a stable and fast connection and has a wide range of compatibility. Tip: Only when the audio input is enough and the power supply voltage/current is enough, there will be enough output power. The higher the power supply voltage, the greater the output power, and the smaller the speaker impedance, the greater the output power. Please make sure that the power of the adapter power supply is greater than the actual working power of the amplifier