At this point, I've replaced the cable on nearly all of my earphones and headphones, all except the ones that are hardwired. Usually that is just to go balanced or because the stock cable is too short, too ugly, or too chintzy. Out of all of those, there have only been two cases where the cable swap made a difference I was certain wasn't just a result of bad memory or placebo effect. The NO is one, of course. The other one was the cable for the TFZ Queen. With that one, the stock cable made them sound absolutely terrible. It gave them an unbearable peak around 2k and harsh metallic treble that I just could not get over. When I went on the forums, I found that my experience of those earphones did not match anyone else's. I kept hearing about how lush and organic they were, and that just wasn't my experience. Well, recently at a meet-up we busted out a multimeter and started testing cables. The cable for the Queen measured alarmingly badly with little consistency between channels. When I got home, I swapped the cable and the sound was immediately better. I can honestly say it made the difference between wanting to sell them, even at a loss, and now listening to them pretty frequently. The NO cable swap wasn't that dramatic, but it had that sort of effect. I was not impressed initially when listening with the stock cable; after the swap, they've become one of my favorites. I don't think it's the particular cable I chose for them either, because I use cables from Periapt, Dyson, Venus Audio, and HiFiMan randomly, just grabbing whatever is at hand. In each case, they're a big improvement over stock. So, my guess is that my stock cable at least was faulty.