ZK-TB21 TPA3116D2 Bluetooth 5.0 Subwoofer Amplifier Board 50WX2+100W 2.1 Channel Power Audio Stereo Amplifier Board Bass AMP

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Product Name : 2.1 channel audio amplifier module with Tone Product Model : ZK-TB21 Bluetooth Version : 5.0 (no shielding, 10 meters) Input Sensitivity: 500mV Audio Input : AUX + Bluetooth Channel : 2.1 Chip Solution : TPA3116D2 (with AM interference suppression) Power Range : DC12- 24V / 5A above (high power recommended high voltage) Adapter Speaker : 20W~100W, 4~8Ω Output Power : Max 50W @ R&L channel Max100W @ subwoofer Protection Mechanism : overvoltage, undervoltage, overheating, DC detection, short circuit protection Product Dimensions : 120mm* 100mm' 20mm / 4.72in*3.97in*0.79in Package Weight: 256g / 0.56 Ib

PS: In the audio input is enough, the supply voltage/current is enough, there will be enough output power! The higher the supply voltage, the greater the output power.The smaller the im- pedance of the speaker, the greater the output power! Please ensure that the power of the adaptor is greater than the actual working power of the amplifier!