Jantzen Audio 000-7120 | 3,9 mH | 0,42 Ω | 2% | 12 AWG

The Jantzen Audio 000-7120 Cross Foil Coil represents a significant advancement in passive crossover component design, offering audiophiles and loudspeaker builders a premium solution for high-fidelity audio systems. This 3.9 mH air core inductor is meticulously engineered to deliver exceptional signal purity and minimal distortion, making it an ideal choice for discerning listeners who demand the very best from their loudspeaker designs.

This copper foil coil excels in high-end crossover networks where precision and low loss are paramount. It is particularly well-suited for use in two-way and three-way speaker systems, as well as in dedicated subwoofer and satellite configurations, where its low DC resistance of just 0.42 Ω ensures efficient power transfer and maintains the integrity of the audio signal. The ±2% tolerance guarantees consistent performance across production runs, allowing for accurate crossover point implementation.

Constructed using high-purity copper foil rather than traditional round wire, this coil features a 12 AWG equivalent cross-section with a wire diameter of 2.05 mm. The air core design eliminates core saturation and hysteresis distortion, while the cross foil winding technique reduces skin effect and proximity effect losses. Measuring 106 x 55 mm, the coil is compact yet robust, with a self-supporting structure that ensures long-term mechanical stability.

For the serious loudspeaker designer, this Jantzen Audio foil coil offers a measurable improvement in transient response and detail retrieval. Its combination of low resistance, tight tolerance, and advanced winding geometry makes it an indispensable component for achieving reference-level crossover performance.