Hi, everyone! I've just bought these in-ear headphones after reading/viewing several positive review about the good price/quality tradeoff. They arrived yesterday... and I'm quite unhappy with one thing: the background hiss. I've tested them with: - the PC stereo output - an MP3 player - Rolls PM351 (that's the device I'll use them with) - RME Babyface Pro audio interface In all of the tests, I can clearly hear a background hiss (louder or quiter depending on the device used, but clearly audible on all devices) even when the output volumes of these device are at minimum. I've read someone else that has this problem, but it looks like they are less annoyed then me. Are here anyone that has these in-ear monitors and have experienced the same problem? (or haven't experienced it) Is it possible that I've got some faulty ones? Notice that the noise is on both left and right buds. I've read people talking about the fact that these have a really low impedance (around 13 Ohm). I've tested all these devices with Beyerdynamics Byron (18 Ohm) and never experienced any hiss (some stranance noises with the Rolls PM351, but I suppose it is due to the 4 poles jack connector of these headphones) When listening to some music the hiss doesn't seems noticeable. But it is still a noise floor that for sure ruin the overall signal. And my main concern is that, when using them on stage when not playing, I'll hear this hiss and start panicking that maybe it is my amp that is noisy or there is some problem on stage or whatever. I can still return them (as said, they arrived just yesterday), but damn, I was so confident that I will get some good price in-ear monitors... Returning them means that I'll need to buy more expensive ones.