Fuhjythy IRS2092S High Power Class D HIFI Mono Digital Power Amplifier Board 500W 58-70V

2. The power supply is recommended to be a DC dual power supply ±65V power supply with better filtering 1. The rated power supply voltage is dual power supply ±65V, and the voltage can work normally at ±58---±70V (cannot exceed 70V, otherwise it burn out). If it is a ring cow, because it does not have a voltage regulator function, the voltage vary. If the power grid fluctuates, please use the margin. Do not connect the positive and negative poles of the power supply wrong to avoid burning the board 3. The speaker is recommended to use a 10-18 inch 4 ohm-8 ohm speaker 4. Although the audio output has short circuit protection, try not to short circuit 5. Please check carefully before powering on to that the wiring is correct before powering on.