Intertechnik LU25/047/045 | 0.47 mH | 1.15 Ω | 3% | 25 AWG | Choke Coil

The Intertechnik Air-core Coil with a 0.47 mH inductance is a premium component designed for audiophiles and loudspeaker builders who demand the highest level of signal purity. By eliminating the ferrite core found in standard inductors, this air-core design completely avoids core saturation and hysteresis distortion, ensuring that your crossover networks deliver transparent, uncoloured sound reproduction.

This coil is ideally suited for use in high-fidelity speaker crossover circuits, particularly in the midrange and tweeter sections where precision and low distortion are paramount. It is also an excellent choice for DIY audio projects, restoration of classic speakers, or any application requiring a stable, non-inductive load with minimal signal degradation. The 0.47 mH value makes it versatile for both two-way and three-way crossover designs.

Technically, the coil is wound with 0.45 mm diameter copper wire, resulting in a direct current resistance (DCR) of just 1.15 Ω, which helps maintain amplifier damping factor and system efficiency. The outer diameter measures 25 mm, with a central hole of 5.5 mm and a total height of 14 mm, making it compact enough for tight enclosures. The winding width is 8 mm, and the tolerance is a tight ±3.0%, ensuring consistent performance across production batches.

With its robust construction and meticulous engineering, this Intertechnik air-core coil is a reliable choice for achieving precise crossover filtering and maintaining the integrity of your audio signal from source to speaker.