Description Features: The rectifier filter board can be used with decoders and power amplifiers to filter out DC components in the power supply, eliminate mains interference, and effectively purify the power supply. The DC cancellation circuit of this invention uses a flat SQ-type inductor to eliminate and prevent electrical noise caused by noise and fluctuations in commercial AC power supplies. By using diodes and capacitors to eliminate the DC component in the AC mains power supply, it prevents the transformer from becoming magnetically saturated or generating quiescent current due to DC components. This circuit can suppress and eliminate AC interference components, providing a clean power supply for your audio equipment. The flat SQ inductor has the following advantages: 1. Small size, large current carrying capacity, with a unit current density more than 1.3 times that of round copper wire; 2. The rectifier tube adopts German-style sealed rectification technology; 3. Closed magnetic circuit, low magnetic leakage, ideal EMI effect, good conductivity and radiation effect, and stable consistency; 4. High dielectric strength extends power supply life. Parameters: Rectifier filter specifications: 160*48*33MM; PCB material and process: 1.6MM double-layer glass fiber, black oil double-sided tin plating; Operating voltage: AC110V-265V; Applicable rated current: less than 2000W; Package contents: 1 piece