Features:
1. TPA3116D2 is a class D power amplifier IC launched by TI, with very high index parameters. The modulation frequency can reach up to 1.2MHZ, and the high-power output distortion is less than 0.1%. 2. With AUX and Bluetooth two audio source input methods, two in one; 3. The potentiometer adjusts the volume, with a switch, it is convenient to control the volume, very suitable for DIY speakers. 4. With filter inductor, the sound is round and clear. 5. It adopts copper DC connector and fence type terminal, which can withstand high current, no heat, no damage to the wire, good wiring, and no short circuit. 6. The DC head wire is compatible with the input power interface of this product. Even if you don't have a DC head adapter or battery, you can easily wire it. 7. The 5.0 Bluetooth version has higher transmission efficiency and longer transmission distance. 8. The power amplifier module does not contain a power supply and requires an external power supply, or it can be connected to a laptop power supply.
Note:
The power switch on the board is a standby switch. After the switch is turned off, the machine is in a low-power standby state. To completely turn off the power or unplug the DC plug on the machine if it is not used for a long time. Tip: Only when the audio input is sufficient and the power supply voltage/current is sufficient, there will be sufficient output power. The higher the power supply voltage, the higher the relative power, and speakers with different impedances will have different output power. In the case of sufficient voltage and current, the larger the horn's ohms, the smaller the relative sound power, please pay attention!
Parameter:
Product name: HI level with filter 2x50W Bluetooth digital power amplifier board Product model: ZK-502C Chip solution: TPA3116D2 (with AM interference suppression function) With or without filter: Yes (the sound is more round and clear after filtering) Adapted power supply voltage: 5~27V (optional 9V/12V/15V18V24V and other adapters, high power recommended high voltage) Adapted speaker: 30W~200W, 40, 8Q Number of channels: left and right dual channels (stereo) Bluetooth version: 5.0 Bluetooth transmission distance: 15m (unobstructed) PCB size: 82*52MM Product weight: 116 g Protection mechanism: overvoltage, undervoltage, overheating, DC detection, short circuit protection Power supply voltage: 12V-8 Oula/12W (left channel) +12 (right channel), 4 Oula/20W+20W 8 ohms/18+18W, 4 ohms/more than 30+30W 19V-8 ohms/32+32W, 4 ohms/more than 45+45W 24V-8 ohms/38+38W, 4 ohms/more than 55+55W
Package included:
1 x Amplifier Board kit 
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