HIFI audio filter linear dual power supply first passes the alternating current through a transformer to reduce the voltage amplitude, and then rectifies it through a rectifier circuit to obtain pulsed direct current, which is then filtered to obtain a direct current voltage with a tiny ripple voltage. The alternating current is made into a power supply board with positive and negative output through LM337 and LM317. It outputs positive and negative 15V voltage. The test again proves that HIFI power supply is not a mystery, the sound is purer, and the current noise floor is further reduced to a minimum!
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