
According to the opening post at http://www.head-fi.org/t/609634/hd-518-teardown-with-a-shocking-twist, they all share the same driver, part number 93481B.
If so, they have certainly tuned and tweaked the HD 518 version far differently than the two bigger siblings. The HD 558 & 598 sound very similar and there is a tape removal mod for the HD 558 that makes it sound almost like a HD 598 clone. On the other hand the 518 is darker; has a smaller sound stage; and is easier to drive from low powered portable devices.































, better soundstage, more clarity... Which should be more comfortable?

