The K553 MKIIs are closed-back over-ear studio headphones for monitoring mixing and mastering. Their unique performance results from the perfect balance between the noise-isolating qualities of closed-back headphones and the spacious dimensional sound of an open-back design. The 50mm drivers provide a strong yet accurate and distinguished bass response as needed for monitoring and mastering contemporary music. The extra-large soft ear pads ensure stress-free listening hours and the 2D-axis mechanism enables full flat folding for easy storage or handling on the road. With its low impedance drivers the K553 PRO is sensitive enough to be used on laptops and mobile devices so the high-quality detachable cable is equipped with a 1/8 in. plug and comes with a 1/4 in. screw on adapter.