Is sibilance normal in these headphones? I got used to their dark sound signature and I think it's quite good (makes music sound more pleasant than fun/energetic), but this one thing is very annoying for me. Every "s" sounds like it's capitalized and extended. I'm not experienced audiophile, but I've never heard anything like that in any other headphones I had (mostly cheap ones). Should that go away with more burn-in?
That's not normal with Momentum Over Ear cans. Like GREQ says, "does it happen with all your music?"