Intertechnik I78/390/080 | 3.9 mH | 0.54 Ω | 5% | 20 AWG | I-Point Coil

The Intertechnik Iron-Core Rod Coil, with a precise inductance of 3.90 mH, is a meticulously engineered component designed to elevate the performance of your loudspeaker crossover networks. This coil delivers reliable and consistent filtering, ensuring that your audio projects achieve the clarity and separation required for high-fidelity sound reproduction.

Ideal for audiophiles and DIY speaker builders, this rod coil excels in low-pass and band-pass filter applications where accurate frequency division is critical. Whether you are constructing a new set of bookshelf speakers or refining an existing multi-way system, its robust iron-core construction provides stable inductance, making it particularly suitable for handling the demands of bass and midrange drivers without compromising signal integrity.

Technical features include a DC resistance of just 0.54 Ω, which minimises power loss and maintains efficiency within the circuit. The coil is wound with 0.80 mm copper wire, offering an excellent balance between current handling and compact form factor. With an outer diameter of 28 mm, a central hole of 4.5 mm, and a total height of 25 mm, it integrates neatly into most crossover boards. The ±5.0% tolerance ensures consistent performance across production batches, allowing for predictable and repeatable results in your designs.

This Intertechnik coil is a dependable choice for achieving precise, high-quality crossover filtering in your next audio project.