Note: The kit needs to be welded by yourselfrange: PCB size: 62 * 100mmInput: AC 5V --- double 20VOutput: DC-/ + 5V -----/ + 20V;Working current: about static 260MAMinimum voltage drop: about 1.5VThe shunt-type stabilized power supply has very small internal resistance, which plays a great role in improving the sound quality. In the music signal current loop, the smaller the internal resistance of the current loop, the better Laid the foundation for reproducing music details, suitable for the front end of the power amplifier to improve the sound quality. The background is very quiet, making the low-frequency brakes better and firmer, and the mid-to-high frequencies become soft and soft, which greatly improves the music. The subjective hearing is milder, and there is no coolness or harshness. Using this power circuit friction machine can work immediately, and the sound quality is significantly improved Because most audio systems generally use three-terminal regulators or series regulators, it is best to use active servo regulators. The performance of the Class A parallel stable power supply circuit is the closest to the performance of the battery power supply, and the effect is of course significant