This 0.210*0.210mm Self-bonding Enameled Rectangular Copper Wire (EI/AI composite insulation) is specially developed for high-fidelity audio voice coil production. Adopting Class 200 EI/AI composite polyesterimide over polyamide-imide insulation paired with self-adhesive layer, it adapts to high-temperature, high-frequency operating conditions of loudspeakers, earphones and automotive audio devices. The wire delivers reliable electrical performance, robust paint film adhesion and outstanding secondary thermal softening & self-bonding properties, guaranteeing pure sound reproduction and durable stable operation of audio equipment.

We are a professional enameled wire manufacturer with 20 years of production experience. Our self-bonding rectangular enameled copper wire supports customized dimensions, and the 0.210*0.210mm specification with Class 200 EI/AI composite insulation is one of our mainstream audio-grade voice coil wires. Benefiting from high heat resistance, superior paint film adhesion and excellent self-bonding performance, the wire retains steady electrical and mechanical properties under prolonged high-frequency vibration. It is extensively adopted in HiFi speakers, car audio systems and Bluetooth earphone speakers. All products are supplied with complete certification documents. We offer sample testing, OEM customization and bulk mass production services with flexible MOQ, and the standard lead time is 15 working days. Feel free to contact us for detailed technical datasheets and samples!

1. High Temperature Resistance: Class 200 EI/AI composite insulation withstands heat generated from voice coil high-frequency vibration, anti-aging and resistant to thermal deformation.
2. Super Strong Paint Film Adhesion: Even, smooth enamel layer with powerful binding strength; no cracking or peeling during high-speed winding and long-period vibration.
3. Excellent Secondary Softening & Self-bonding Performance: Good thermal softening and self-adhesive characteristics. Coils can be directly shaped and fixed by heating without extra adhesive, boosting production efficiency and yield for audio manufacturers.
4. Ultra-stable Comprehensive Performance: Precise consistent wire dimension and stable conductivity, effectively preventing sound distortion, background noise and fluctuating acoustic output.
5. Audio-grade Customized Design: Optimized rectangular cross-section structure to improve winding density; ideal for miniature earphone speakers, HiFi loudspeakers and automotive audio units.

We are a professional enameled wire producer with over 20 years of R&D and manufacturing experience, focused on high-precision audio-grade voice coil magnet wire.

• Free samples available for performance validation
• Flexible MOQ and reliable mass production capacity
• Customizable wire sizes, insulation and self-bonding requirements
• Rigorous quality inspection; consistent dimension and stable batch-to-batch performance
• Standard production cycle: 15 working days