In crossovers, high-impedance coils are often used specifically as equalizers, e.g. coils with inductances of 2.20 mH to 27.00 mH.
These coils with high internal resistance (due to the thin wire) have an attenuating effect - which may be intentional.

They are used in parallel branches of high-pass filters (i.e. in the classic 6 dB crossover after the capacitor to ground) so as not to overemphasize the high frequencies.


Coils with a higher series resistance are also sometimes used when adjusting the volume of mid-range or tweeters ("tuned to the efficiency of the bass"). This saves additional resistors. A high-impedance coil has a significant DC resistance (DCR). This acts like a series resistor in the filter and ensures a less steep, "smoother" filter curve. This can be desirable in terms of music and sound.

Copper wire: 0.50 mm - 0.60 mm CU purity: > 99.99%, wire connection length: 10 mm, tinning length: 9 mm, body: ABS, L-tolerance: 5%, L-measurement value: Nom. 25C 1 kHz.