1. Introduction
The LHY AUDIO AC Line EMI Power Filter Board Module is a high-quality, bipolar X common mode Y differential mode filtering power supply designed to effectively suppress and eliminate AC circuit interference components. When integrated into your audio system, it aims to provide a smoother sound, significantly improved resolution, and a cleaner background by reducing sound noise and interference.
This filter board is constructed with premium components, including a new flat copper common mode inductor, professional X2 and Y2 filter capacitors, and a military-grade FR4 PCB board.
2. Safety Information
WARNING: This EMI filter board is designed for purifying mains power. During operation, all components on the board may carry high mains voltage. Please exercise extreme caution and avoid touching the circuit board or its components randomly to prevent electric shock. Installation should only be performed by individuals with appropriate electrical knowledge and safety training.
- Always disconnect power before installation or maintenance.
- Ensure proper insulation and secure connections to prevent short circuits.
- Do not operate the module in wet or damp conditions.
3. Product Overview
The LHY AUDIO AC Line EMI Power Filter Board is a compact and efficient module designed to enhance the purity of your AC power supply. It features clearly marked input and output terminals for straightforward integration.
Key components include:
- Common Mode Inductor: A flat copper wire vertical inductor (4A 10mH) designed for effective EMI suppression.
- X2 and Y2 Capacitors: Imported safety-regulated capacitors for robust filtering performance.
- FR4 PCB: Military-grade printed circuit board for durability and reliability.
4. Specifications
| Feature | Specification |
|---|---|
| Input Terminal | 220V AC (L GND N) 6.35 terminal |
| Output Terminal | 220V AC (L N) 6.35 terminal |
| Common Mode Inductance | 4A 10mH flat copper wire vertical |
| X2 Y2 Capacitor | Imported safety regulated capacitor |
| Fixed Hole Center to Plate Edge | 3.5 mm |
| Weight | Approximately 30g |
| Dimensions (L x W x H) | 6cm x 3cm x 2cm |
5. Installation and Setup
The filter board can be installed in various locations to optimize its performance. The ideal installation points are:
- At the power socket of the device.
- Before entering the audio equipment transformer.
- Before switching on and off the power supply.
- At the power port on the back of the monitor.
Ensure that the input and output terminals are correctly wired according to the diagram below. The 'L' terminal is for Live, 'N' for Neutral, and 'GND' for Ground (if applicable to your setup).
If you have purchased the DIY kit version, carefully assemble the components onto the PCB as shown in the component layout diagram.
6. Operation
Once correctly installed, the LHY AUDIO AC Line EMI Power Filter Board operates passively to filter out electromagnetic interference (EMI) and radio-frequency interference (RFI) from your AC mains power supply. This purification process results in a cleaner power signal delivered to your connected devices, leading to improved audio fidelity and reduced background noise.
The bipolar X common mode Y differential mode filtering circuit works to suppress both common mode and differential mode noise, ensuring comprehensive interference reduction.
7. Maintenance
The LHY AUDIO AC Line EMI Power Filter Board is designed for long-term, maintenance-free operation. To ensure optimal performance and longevity:
- Keep the module in a clean, dry environment.
- Avoid exposing it to extreme temperatures or humidity.
- Periodically inspect connections to ensure they remain secure.
- Do not attempt to modify the circuit board or its components.
8. Troubleshooting
If you experience issues after installing the filter board, consider the following:
- No power to device: Check all wiring connections (Live, Neutral, Ground) for correctness and ensure they are secure. Verify the power source is active.
- No noticeable sound improvement: Ensure the filter is installed at an optimal point in the power path. Some audio systems may have inherent noise sources not related to AC line interference.
- Humming or buzzing: Re-check all connections for loose wires or improper grounding. Ensure the filter board itself is not touching other conductive surfaces.
If problems persist, consult a qualified electrician or audio technician.
9. User Tips
- This filter board is particularly effective for sensitive audio equipment such as earbuds, front-stage amplifiers, and DAC decoders, where clean power can significantly impact sound quality.
- Consider installing the filter as close as possible to the device you wish to protect for maximum effect.
- For DIY enthusiasts, ensure all solder joints are clean and strong for reliable performance.
10. Warranty and Support
For warranty information and technical support, please refer to the seller's policies or contact the point of purchase. Keep your purchase receipt for any warranty claims.
