An Ultra-comfortable Version of the DT 990 The DT 990 Premium Edition Headphones are made for listening in total comfort. You'll love the headband's plush padding and moderate clamping force. Skin-friendly velour ear pads ensure a comfortable listening experience for hours on end. You'll enjoy the same excellent sound quality of the original DT 990s too! These open-back headphones feature 45mm dynamic drivers for an expansive sound and brilliant bass. The DT 990 Premium Edition headphones provide you with a three-dimensional sound that reproduces all media details for a listening experience that few headphones can match. The DT 900 Premium Edition Headphones also included an updated look for the musician on the cutting edge.