Feature:1. Product Information: Power amplifier chip TPA3255, working voltage range 18-50VDC, limit 53V. It is recommended to use a DC power supply with a voltage of 36-48V and a current of more than 10A. The higher the voltage, the greater the output power.2. Adaptive Speaker: 3-8 ohms, 50-300W in BTL dual channel mode. PBTL mono mode 2-8 ohms, 100-600W. Heat dissipation mode, temperature control automatic air cooling, or manual selection of fan rotation.3. Gain Selection: Potentiometer 10 speed adjustment, 26dB-36dB. Bridge mode, power off first, switch the DIP switch No. 1 to the ON position, output R+ L+ short circuit parallel output, R-L - short-circuit parallel output. In BTL mode, 2x300W 50V 4, 160W 50V 8. Under maximum power PBTL mode, 600W 50V 2, 300W 50V 4, 160W 50V 8.4. Protective Mechanism: Input undervoltage, overheat, overcurrent, short circuit prevention. No input anti reverse protect, positive and negative terminals can not be reversed.5. Enlarged Heat Sink: Equipped with large and efficient heat sink, the device ensures stable operating under sustained high power output. It effectively dissipates generated heat, enhancing the operational efficiency of the amplifier board and ensuring outstanding performance under high loads.Specification:Item Type: ZK-3002 amplifier boardMaterial: PCBAmplifier Chip: TPA3255Compatible Power Supply: Operating voltage range 18-50VDC, maximum 53V. Recommended voltage is 36-48V with a current of 10A or above. Higher voltage allows for greater output power.Gain Selection: Potentiometer 10 speed adjustment, 26dB-36dBBridge mode: Power off first, switch the DIP switch No. 1 to the ON position, output R+ L+ short circuit parallel output, R-L - short circuit parallel output.Maximum Power Output:In BTL mode: 2x300W 50V 4, 160W 50V 8In PBTL mode: 600W 50V 2, 300W 50V 4, 160W 50V 8.Package List:1 x ZK-3002 Amplifier Board1 x Connection Cable1 x User Manual