Originally Posted by
daltonlanny 
The Stefan Audio Art Equinox made an easily noticeable improvement over the stock Sennheiser HD650 cable on my Sennheiser HD650. I could quite easily hear the improvements. Better soundstaging, more clarity in the mids and highs, and no grain at all compared to the stock cable. The only area that did not really change or improve to me was in the bass.
I always listen to my 650's with the Equinox. I cannot bear to listen to them with the stock cable after hearing the Equinox.
Not so with the Cardas cable. It was different with the Cardas but not really better, IMHO.
Interesting that daltonlanny's impressions of both the Cardas and Equinox cables match my impressions. Doesn't seem likely if there were no audible difference at all between cables. (By the way, I had expected the Cardas cable to sound better than it did, so I don't see how my perception could have been caused by expectations. Similarly, I hadn't expected the Equinox to sound as good as it did.)
Anyone who says that all headphone cables sound alike should listen with an Equinox cable. (You can try one at a meet, or perhaps buy a used one and resell it if you don't like it.) You may or may not prefer the sound of the Equinox, but you should easily be able to hear a difference from the stock Sennheiser cable.