The Solid Bass range has been a staple of the Audio-Technica headphone family for some time now. The ATH-CKS550iS is proof positive of the evolution of Solid Bass headphones over the years, with stark improvements across the board. Dynamic 9.8 mm drivers are housed inside a sleek and stylishly designed chassis that incorporates Audio-Technica’s unique Air-Flow Bass Venting System that provides smooth, full bass. An improved in-line control system allows ease of use when answering calls and controlling music and video playback system, while the omnidirectional condenser microphone provides crystal clear voice communication.