I have been looking for good acoustics for my w580i, but I can't find ones that don't have a hiss sound. I could be a problem with my phone, but i doubt it.
I tried Peter's V2 for W series and it sounds awesome. But when i put it in low volume, and put quiet songs, I can hear a very annoying hiss sound. So I went back to the original phone acoustics, and that hiss disappears. I would like to know if there are any acoustics that don't have a hiss sound. THANKS! :D