1. First-level differential mode filtering with two differential inductors to suppress mid- to high-frequency interference on AC power supply. 2. First-level common mode filtering using X2 capacitors and common mode inductors. 3. Three-stage common mode filtering provides enhanced noise suppression, including effective mitigation of fast transient burst interference at repetition frequencies up to several kHz. 4. Three-stage composite EMI filter circuit (one stage differential mode + two stages common mode) delivers improved noise filtering performance. 5. Effective suppression of fast transient burst interference at repetition frequencies up to several kHz. 6. When used with a decoder or power amplifier, this module filters DC components from the power supply, reduces transformer hum, minimizes high-frequency power supply noise, and improves overall power quality. 7. Input GND must be connected to the power cord ground wire; connection to chassis ground is optional depending on installation requirements. Specifications: Name: Three-Stage Audio Amplifier EMI Power Filter Input Voltage: Single-phase AC 110–250 V Output Voltage: Single-phase AC 110–250 V Rated Load Current: 10 A Input Connector: 3-wire 7.62 mm pitch terminal block Output Connector: 2-wire 7.62 mm pitch terminal block Color: Black Material: PCB and electronic components Note: Appearance and minor details may vary by production batch.