AKG K245 Open-back Studio Headphones - Foldable, Ergonomic, Studio Quality - Black. Take the studio with you. The over-ear, open back AKG K245 feature a transparent, yet spacious sound, and you'll find them perfect for mixing and editing on the go. Their roadworthy design takes away the worry of damage while traveling, and their ergonomic design provides a comfortable fit for extended wear. These headphones deliver unmatched sound quality and comfort, with large 50mm transducers for greater low-frequency extension and detailed bass reproduction. Built to last with metal hinges and a replaceable cable, these headphones are designed for years of heavy use. The innovative, three-axis hinge allows for easy folding and transport.