Intertechnik Air-core Coil – 0.03 mH | LU25 | DCR 0.20 Ω | Cu 0.50 mm | ±5.0%

The Intertechnik Air-core Coil with an inductance of 0.03 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 ideally suited for high-frequency filtering in two-way or three-way speaker systems, where maintaining signal integrity is paramount. It also excels in series and parallel crossover topologies, providing stable performance across a wide frequency range.

Technically, this coil features a low DC resistance of just 0.20 Ω, minimising power loss and preserving amplifier damping factor. The 0.50 mm copper wire (Cu 0.50 mm) offers an excellent balance between current handling and compact form factor, with a 25 mm outer diameter and 14 mm total height. The inductance tolerance of ±5.0% ensures consistent crossover points, while the maximum power tolerance of 60 W allows for robust performance in moderate to high-power systems. Six mounting holes facilitate secure installation on crossover boards, and the overall depth of 77.7 mm accommodates standard enclosures. Whether you are building a new speaker or upgrading an existing design, this Intertechnik air-core coil delivers reliable, high-fidelity filtering with minimal signal degradation.