Isnt there a problem with intermodulation distortion for a driver covering such a wide frequency range?
No. The IDS-25 has exceptionally low distortion. When an ordinary driver is used to cover the entire frequency range, you can expect the harmonic and intermodulation distortion to be relatively high. However, the IDS-25 drivers have the same low distortion construction used in design of soft dome mids and tweeters. The cone is actually made of woven fiberglass and dissipates energy over its entire surface, reducing edge reflections and drastically lowering distortion. In addition, the magnet assembly employs the latest technology consisting of a copper cylinder through the entire length of the voice coil gap. This shorting cylinder is known to significantly reduce distortion contributed by the magnet structure to one tenth of conventional driver distortion. This improvement is particularly noticeable in the voice range. The diameter of the cone is small compared to the voice coil diameter and also contributes to lower distortion.
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