Impedance "seems" weird because, unlike a normal resistor, it's really resistance as a function of frequency. For things like speakers and coaxial cables, I never understood why they don't quote the impedance at some specific frequency it's calculated at. For a speaker, it's because it's really a big inductor (coil of wire) without very much resistance. For coaxial cable, it's a big capacitor without much resistance.
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'67 Piper Cherokee
'66 Lemans
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