Intertechnik AT55/047/132 | 0,47 mH | 0,21 Ω | 3% | 16 AWG

The Intertechnik AT55/047/132 air core choke coil is a precision component designed for audiophile-grade loudspeaker crossover networks. Engineered to deliver accurate filtering, this 0.47 mH inductor ensures clean signal separation between drivers, preserving the integrity of your audio system. Its air core construction eliminates core saturation and distortion, making it ideal for high-fidelity applications where sonic transparency is paramount.

This choke coil is perfectly suited for use in passive crossover designs for bookshelf speakers, floor-standing towers, and custom DIY audio projects. Whether you are building a two-way monitor or a multi-driver system, the AT55/047/132 provides reliable performance in frequency-dividing circuits, ensuring that each driver receives only the intended range of frequencies. It is also an excellent choice for upgrading existing speaker crossovers to achieve more precise sound reproduction.

Technically, the coil features a 16 AWG wire diameter of 1.32 mm, wound on a 55 mm outer diameter former with a 28 mm core diameter and a total height of 30 mm. The winding width is 24 mm, and the central bore measures 5.3 mm with a recess diameter of 25.5 mm. With a DC resistance of just 0.21 Ω and a tight tolerance of ±3%, this choke coil minimises power loss and ensures consistent performance across production units. The robust air core design guarantees linear behaviour across the audio frequency range, making it a dependable choice for critical listening environments.