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View Full Discussion This IEM looks interesting because of the switch that can turn it from analytical to fun sounding, but I can't find an explanation as to how it does it. Well I do, but there's oddball explanations such as the following at https://penonaudio.com/tfz-king-edition.html
I get that impedance can change the sound of an earphone, but the following "KING EDITION is designed with two different listening style settings, which can be switched by the adjustable switch on the panel. The impedance variation range is 20Hz. The ON position is 15 ohms, the OFF position is 17 ohms, and the 1KHz at ON position is 17ohm. The OFF position is 18ohm. 18 ohms, 10KHz at ON position is 18 ohms, OFF position is 12 ohms, The overall style is more biased towards the musical atmosphere in the OFF position, in the ON position , more inclined to resolution and restored and is more suitable for on-site monitoring and other requires professional acoustic performance." Well, it makes little sense.
Impedance is measured in ohms so where do they get that it varies by frequency? And there's other stuff that just sounds like "Engrish". Does the switch really change the impedance or what?