Intertechnik LU92/3.9/140 | 3,9 mH | 0,67 Ω | 3% | 15 AWG

The Intertechnik LU92/3.9/140 is a premium 3.9 mH air core coil, meticulously engineered for high-fidelity loudspeaker crossover networks. As an air core design, it entirely eliminates the core saturation and hysteresis distortion that can plague iron-core alternatives, ensuring pure, uncoloured signal transmission for the most demanding audio applications. This coil is ideally suited for use in passive crossover filters for high-end home theatre systems, studio monitors, and bespoke DIY speaker projects where sonic transparency is paramount.

Technically, this inductor features a low DC resistance of just 0.67 Ω, which minimises power loss and maintains excellent damping factor for tight, controlled bass response. The coil is wound with 1.4 mm diameter wire (15 AWG) on a 92 mm outer diameter former, providing a generous winding width of 33 mm and a total height of 39 mm. With a precise tolerance of ±3%, it guarantees consistent performance across production batches. The 5.3 mm central bore and 25 mm recess diameter facilitate straightforward mounting. Whether you are upgrading an existing design or building from scratch, this Intertechnik air core coil delivers the accuracy and reliability required for truly transparent audio reproduction.