DW, I've been considering trying the Cardas out with my 600's. Could you (and anyone else who's done it) possibly post a specific description of what you heard, before and after the swap? Thanks!
Cardas replacement cord for Sennheiser HD-600
I just had to mention that the new Cardas replacement cord for the Sennheiser HD-600 headphones is just terrific. It's well worth a look at around $150. Just had to mention it. Oh - Music Direct carries them (amusicdirect.com) No - I'm not affiliated with them - just a very happy customer. Best.