Intertechnik LU120/3.9/20 | 3,9 mH | 0,39 Ω | 3% | 12 AWG

The Intertechnik LU120/3.9/20 air core coil is a premium component designed for audiophiles and loudspeaker builders who demand uncompromising sound quality. With a precise inductance of 3.9 mH and an exceptionally low DC resistance of just 0.39 Ω, this coil ensures minimal signal loss and accurate frequency division in crossover networks. Its ±3% tolerance guarantees consistent performance, making it ideal for high-fidelity audio systems where every detail matters.

This air core coil is perfectly suited for use in passive crossover designs for bookshelf speakers, floor-standing towers, and studio monitors. It excels in low-frequency filtering applications, delivering clean, undistorted bass response without the saturation or distortion that can occur with iron-core alternatives. Whether you are building a new set of speakers or upgrading an existing design, this coil provides the precision and reliability required for critical listening environments.

Constructed with 12 AWG wire and a generous 49.5 mm core diameter, the LU120/3.9/20 features a robust air core design that eliminates core losses and maintains linearity across the audio band. The coil measures 55 mm in total height with a winding width of 47.5 mm, and its 41.5 mm recess diameter and 5.3 mm centre hole facilitate easy mounting. The 2 mm wire diameter ensures excellent current handling, while the 3% tolerance guarantees that each unit meets exacting specifications.

For discerning audio enthusiasts, this Intertechnik air core coil represents a reliable investment in sound quality, offering the technical excellence needed to achieve precise crossover slopes and transparent audio reproduction.