Can someone tell me what is the difference between Sennheiser HD25-13 II and Sennheiser HD25-1 II.
I saw that ohm impedance is different and the hd25-13 come with a 3m cable. Is that 3m cable an accessory or the headphones come directly attached with it?
And what is ohm impedance?
Edited by sebastianm - 12/1/11 at 6:03pm