Beyerdynamic DT 990 PRO vs Sennheiser HD 6XX

The Beyerdynamic DT 990 PRO and the Sennheiser HD 6XX are both open-back headphones that are well suited for audiophile use. The Sennheiser have a more consistent audio delivery and a wider, more immersive soundstage.  However, the Beyerdynamic are more comfortable and better-built, and they also come with a pouch to help protect the headphones. Both headphones lack low-bass and have very detailed mid-range reproduction, which is common among open-back headphones, but they differ in their treble range reproduction. The Sennheiser feature slightly recessed highs that can darken sibilants, whereas the Beyerdynamic are the inverse; with a brighter mid-treble reproduction that can make sibilants sound bright.