Intertechnik LU25/039/045 | 0.39 mH | 1.04 Ω | 3% | 25 AWG | Choke Coil

The Intertechnik Air-core Coil, with an inductance of 0.39 mH, is a precision component designed for audiophile-grade loudspeaker crossover networks. Its air-core construction eliminates core saturation and hysteresis distortion, ensuring pure, uncoloured signal transmission for critical listening applications. This coil is ideal for use in high-fidelity speaker builds, studio monitors, and custom audio projects where accurate frequency separation is paramount.

Engineered for demanding crossover designs, this coil excels in both two-way and multi-way speaker systems. It is particularly suited for midrange and tweeter filtering, where low distortion and stable performance are essential. The 0.39 mH value allows for precise crossover points, enabling seamless driver integration and a natural soundstage. Whether you are a DIY enthusiast or a professional speaker designer, this component delivers reliable, repeatable results.

Technical features include a DC resistance of just 1.04 Ω, minimising power loss and maintaining signal integrity. The coil is wound with 0.45 mm copper wire on a 25 mm outer diameter former, with a 12 mm core diameter and a total height of 14 mm. The winding width is 8 mm, and the central mounting hole measures 5.5 mm, with a recess diameter of 10 mm for secure installation. A tight tolerance of ±3.0% ensures consistent performance across production batches.

This Intertechnik air-core coil combines meticulous construction with audiophile-grade specifications, making it a trusted choice for high-quality crossover networks. Its robust design and precise electrical characteristics guarantee long-term reliability and exceptional sound reproduction.