plakat
Headphoneus Supremus
At 7:07 in the video he says that the TH600 is identical to the TH900 except for the aluminum cups. I don't think that's true.
Don't think so either: the magnet system seems to be different (with the TH900 offering 1,5T of magnetic flux density, while the TH600 is labelled as 1T), the TH900 has a 7N OFC cord, the TH600 features 6N (for what thats worth... I don't think thats any kind of relevant distinction), the sensitivity of the TH900 is quite a bit higher (100dB/mW vs. 94 dB/mW).
Not sure about the part numbers of the pads, though. They look and feel quite the same to me.