Pros: Rich sound, very comfortable earpads, great mids, punchy bass, great soundstaging
Cons: bad 3.5mm adapter (way too large)
The sound produced by the HD558 is rich, a bit light, and isn't bloated with bass which is a good thing. It has a crisp treble and punchy bass, very great soundstage(expected from an open headphone) but sometimes the bass lacks. The great thing is this headphone will play any genre of music well, even from rock to classical(they play very well with classical).
The HD558 is very great for listening to music for hours. The velour pads very soft and comfortable, when you put it on, your head will still feel very light, and the pads are well shaped and pads are also great at managing sweat.
The design isn't very interesting/eye