Speaker Protection Circuit: The speaker protection circuit not only eliminates the shutdown impact noise of the amplifier, but also prevents DC burning of the output speakers if the amplifier is damaged. (Additional recommendation) No Debugging: As long as it is installed correctly, there are no human errors, and it will basically succeed without debugging. Even beginners have a very high success rate. Low Noise: The switching noise is small and does not greatly affect the speakers. The background noise is very small, and you basically cannot hear any noise with your ear close to the speaker. Durability and Reliability: Because it uses a classic circuit, it can work stably and reliably, and incorrect use does not necessarily damage the components. It has a certain degree of durability, and the manufacturing success rate is high. Stable and Usable: The amplifier board is installed without debugging, and the output 0 drift voltage usually does not exceed 50mv, making it more stable. Operation has not been confirmed. 7-7