I think it's very difficult to talk in terms of ' if it sounds bad,it's fake'. SQ is a subjective thing, what someone considers bad,for someone else is great. For example,60 ppl bought the earphones from my seller,and they all think they're great. And there was someone in this thread who said that although the logo faded away also, they sound great for him and he doesn't think they're fakes. And there are many reviews of S4s that say they sound muddy. Exact words I would describe the sound of the S4s I got. And there's an e-mail from Klipsch saying that, at least from the serial # on the box, my earphones were not fake. I have doubts about comparing them to the new model also, because ebay lot seems to be an older model,with different packaging, connector and who knows what else. Untill Amy gives us a definite answer, I think we can't be 100% sure that logo fading away is a sign of fakes.