Test & measurement
- Amplifier accessories
A ferrite core coil is an inductor with a magnetic ferrite core (which influences the electromagnetic effect) and works as a filter. It is designed to cut out the high frequencies so that a subwoofer, for example, only receives low frequencies, which he can process. The opposite of this is a capacitor – which filters out high frequencies. The inductance of ferrite core coils is measured in henry (H). However, 1 henry is a large unit of inductance, which is the reason why all values within our coils assortment have values that typically range in the smaller unit millihenries (mH).
The high-performance material HP3616 used for ferrite core coils is characterized by low elementary distortions and low hysteresis losses, which means a rapid change in magnetization. The marginal music signal delay makes ferrite inductors perfectly suitable for equalization networks and mid-driver applications. It is also well-suited for low-power mid-woofers. Even though the material ferrite is magnetic, a ferrite core coil does not act as a magnetic when installed in a crossover board.
Yes, the type of core material affects the inductivity. The cored inductors iron and ferrite, for example, offer a higher inductance with less copper wire. Less wire means lower resistance. The downside to less wire is that the cores can get saturated, which causes distortion. However, not all coils have a solid core, e.g. Litz wire wax coils, toroidal coils, and air-core coils.