2A-18A Power Supply Filtering Board DIY Audio Power Supply Filter EMI High Frequency Two-stage Power Low-pass Filter Boa

Product Introduction 1 The internal circuit of a two stage composite EMI filter uses two stage also known as two stage filtering resulting in better noise removal effect It can effectively suppress the problem of rapid transient group pulse interference with a repetition frequency of several thousand hertz in certain user sites 2 This module when used in conjunction with a decoder or power amplifier can filter high frequency noise from the power supply eliminate mains interference purify the power supply significantly improve the sound quality of the power amplifier enhance resolution and make the background quiet 3 The input GND needs to be connected to the ground wire of the power cord and can also be connected to the chassis shell Depending on the specific situation please pay attention to the direction when welding the common mode inductor Please install and weld according to the markings on the circuit board and the baby picture 4 Common knowledge of high frequency electromagnetic interference EMI filters For high frequency electromagnetic interference EMI generally three technologies can be used for power filtering to suppress interference noise In practical use two or even multiple technologies are usually mixed They are Add a capacitor also known as the X capacitor between the live and zero lines of the power supply Select X2 type mainly used to eliminate differential mode interference with a capacity range of 0 01UF 0 47UF Add capacitan