One advantage that this inductor has is an ease of mounting. The wire on this one is 16g and it's DC resistance is rated at 0.289 ohms. Many laminated iron core inductors have relatively low power ratings (their cores saturate easily) but this one (Erse Audio ESQ55-16-6800) is rated for 500 watts. The following inductor is a good quality laminated iron core inductor. Below, you'll see how having an air core inductor may not always be the best option. When this happens, the inductor's value changes significantly and this can be audible. Saturation occurs when sufficient power is applied to the inductor to push its core to its limits (much the same as driving an amp into clipping). When building crossovers, many people believe that the air core inductor is the absolute best because the core cannot interfere with the sound and an air core inductor cannot saturate. The air core inductor has slightly lower inductance (6.0mH vs 6.8mH) but the laminated iron core inductor and the ferrite core inductor have the same value. The following inductors are all approximately the same value. To increase the value with shorter lengths of wire, you can wrap the wire around a core made of magnetic material like iron or ferrite. If two inductors have the same value (usually stated in millihenries, for those used with speakers) but one is wound with larger wire, the larger wire (all else being equal) will allow more power to be delivered to the speaker. This will ensure that there is little power loss in the coil and the power is efficiently transferred to the speaker. Ideally, the inductor should have very low D.C.
#Ferrite core inductor crossover coil series#
a coil or choke) in series with a speaker will block higher frequencies while having little effect on the lower (bass) frequencies. Inductors Used in Passive Crossovers Using an inductor (A.K.A.
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