Y'know those resistance numbers struck me as a bit high so I went and did a little napkin math...
That should make them roughly equivalent to 30, 32 and 33 awg, right?
Is 33 awg really "good enough"? I admit my knowledge on the subject of audio cabling is limited but just from an electrical standpoint, given the power involved... I think that'd be in the neighborhood of 10-20+% voltage drop in the cables at the power ratings for the IEMs they're driving? That doesn't seem great...
(and then if that math is right, I think anything besides the stock cable should be "good enough"?)
I can't help but wonder if this is an intentionally flawed design?
i don't know the equivalent awg, maybe different materials (types of copper, silver..) have different resistance coefficient, and guess that the contacts (jacks) also show some resistance.
but yes, not only the voltage/power drop but also the impedance interaction between the source and some low-impedance-high-sensitivity balanced armatures should concern us.
zs5 is 8Ω (even someone measured 4Ω or 5Ω and posted in this thread), 2xBA. i guess that's why people say they are source high dependent (bet they don't pair well with "high" output impedance sources -above 1Ω- nor with sources using low capacity coupling caps: too much tonal alterations). i've ordered zs5 v2 just to check that (and if so, to replace the pai audio mr3 from my test rig, wouldn't like to damage them).
so an appropriated source and lowest possible added resistance could be a must to preserve original zs5 tonality. when they arrive, i'll post the results.
my best cables are usually the thickest (total awg) and show the lowest DC resistance, regardless of being copper, silver plated, silver, ofc, 4N, 5N, 6N, 7N (most being longer than 1m or 1.2m), although i suppose that many other factors are involved (i know nothing..):
impact audio infinite (eidolic plugs), 5N copper, 4 strands: 0.19Ω
pure silver 7N 8 (narrow) cores: 0.29Ω
stock he400i cable: 0.34Ω
canare star quad L-4E6S (copper, 4 wires, pailics plugs): 0.05Ω (the thickest ones, maybe too stiff and heavy to be used with earphones; used as interconnection)
guess a good balance between flexibility, microphonics, and resistance should be the goal.