through simple Ohm meter through stock cable in both xlr and 1/4 jack.
Technically what I measured are DC resistances including the stock cable resistance.
There are some 10 % tolerance over there.
I didn't remember those exact measure.
I can poste again the measure if you like.
I just wanted to remind you that the impedance is measured with AC signal and can not be measured by a multi meter, and yes you were measuring the DC resistance. I am not sure about the 10% tolerance.
I have the Hifiman wood veneer cup, 2.5mm plug version of the HE560 and I really enjoy their sound. To me, the mids and treble of the HE560 are similar to Shure's 1840 with a fuller bass.