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I'm speaking about such thing: Impedance Jack
30 ohm will be fine.
No need to mod Cann or any other players - use impedance jacks. Search for them on Ali or Ebay.
Hello. This is not a defect - it is an effect of compressed air inside earcup that hits light membrane. Sure you have a question - why only in one...
Sorry for inconviniences, as I've told all problems are solved and I will not make same mistakes in future.
About differences in pads -...
The whole unit passed a stress-test! :D
International shipping sometimes is a real pain ;(