In fact, out of the box they sound so-so. For a long time I compared them in the store with the Bose 700. I connected them wirelessly to an iPhone and listened to different tracks (classical, piano, classic rock). Sony has some kind of mess with sound, very indistinct high frequencies, everything is blurry. But at the same time, the headphones sound quite cheerfully, strong bass. They say an equalizer app can fix this, but I haven't tried it. Now I'm leaning towards the Bose 700. In the meantime, I left the store with nothing :( I'll think about it.