However changing the entire cable is like changing the substance of your car.
It's like replacing a copper radiator with an aluminum one, both will do just in cooling down the engine (delivery of sound), some may swear that the other does a better job).
I'm borderline between thinking it's placebo and it actually improving the sound quality. There's so many saying silver will improve the sonics, perhaps it's true since they have so much time on their hands and have done some blind testing, then again, all those people are usually the ones who are selling the product. If they're not selling it, they sure are hypnotized by it. (Same with Power Plug Cables)
For some of us, we just want high quality cables that are going to last a long time, knowing that it uses the highest conductive properties and shielding so we can sleep easy knowing that the music delivered to us by the sound system isn't flawed due to the cable.
6.3mm adapter should not degrade sound quality (unless you get some of the crappy chinese ones). If they have a tight good contact, then it's passable. (95% of the chinese adapters i bought for 6.3mm broke within 6 months). For 6.3mm to 3.5mm i recommend Sennheiser and Grado, as for the 3.5mm to 6.3mm the NuForce one is very solid. If your mind still tells you that 6.3mm is the way to go and you don't want any adapters blocking the way, then buy a $2-5 1/4 plug such as Neutrik NP3X-B (My favorite) and solder it on with silver solder.
I actually think 6.3mm adapters are a nice thing to have, and that 3.5mm cable output is recommended. Who knows when you'll want to use the headphones on an ipod or other devices. Don't want you to go looking for an adapter
Edited by cssarrow - 12/6/12 at 11:28pm