Jantzen Audio 000-5057 | 12 mH | 1,18 Ω | 3% | 20 AWG

The Jantzen Audio 000-5057 iron core coil delivers a precise 12 mH inductance, making it an essential component for high-fidelity loudspeaker crossover networks. Engineered for audiophile-grade performance, this coil ensures accurate frequency filtering, allowing designers to achieve clean separation between drivers and maintain sonic clarity. Its robust construction is ideal for both DIY speaker builders and professional audio engineers seeking reliable, repeatable results in passive crossover designs.

This coil excels in low-frequency applications where iron core inductors provide higher inductance values in a compact form factor. It is particularly suited for woofer and subwoofer crossover circuits, where its 1.18 Ω DC resistance minimises power loss while maintaining efficient signal transfer. The ±3% tolerance guarantees consistent performance across production runs, critical for matched pairs in stereo systems or multi-way speaker arrays.

Technical features include a 20 AWG copper winding on a ferromagnetic iron core with integrated discs, which reduces external magnetic interference and stabilises inductance over a wide frequency range. The core’s laminated construction minimises eddy currents, preserving transient response and reducing distortion. Measuring 41 x 46 mm, this coil fits neatly into compact crossover boards without compromising electrical performance. Each unit is precision-wound and tested to Jantzen Audio’s stringent quality standards, ensuring long-term reliability in demanding audio environments.

Whether upgrading existing speakers or building bespoke designs, this iron core coil offers the consistency and sonic integrity required for high-end audio reproduction.