We highly recommend the top-tier 4.4mm connector, the AECO AT4-1812, to all our fans! This connector stands out with its exceptional design and features

made in taiwan

• Patented One-Piece Machining Design
• Nickel-Free Plating with 10u Gold or 120u Silver Coating
• High-Purity Tellurium Copper Design
• ​We offer both gold-plated and silver-plated versions​

plug-material.html1. **Patented One-Piece Machining Design**: All polarities use a one-piece machining process with equal conductor cross-sectional areas. This design minimizes signal loss during transmission between different parts, resulting in superior sound performance compared to ordinary connectors.
2. **Nickel-Free Plating with 10u Gold Coating**: The use of nickel-free plating and a 10u gold coating further enhances sound quality.
3. **High-Purity Tellurium Copper Design**: Offers excellent conductivity and outstanding sound quality.
We offer both gold-plated and silver-plated versions:
- **AT4-1812S Silver-Plated**: Ideal for those who prefer high-resolution and high-frequency sound.
- **AT4-1812G Gold-Plated**: Perfect for those who prefer a neutral and sweet sound.
Both versions are priced the same: Retail price is 1250 TWD, and the installation price is 1480 TWD.
Taiwan patent number:(M638409)​
### Conductivity Insight:
Among elemental metals, silver has the highest conductivity, followed by copper, and then gold. For more information on materials, see below.
Learn More:
IS THE METAL MATERIAL OF THE CONNECTOR ALSO IMPORTANT FOR SOUND QUALITY, NOT JUST THE HEADPHONE UPGRADE CABLE MATERIAL?