Boasting Sony's booming Extra Bass feature, the MDR-XB550AP headphones crank up the low frequencies to give your music extra power, dynamism and depth. Soft cushioned earpads ensure a comfortable listen while the built-in mic allows you to take calls on the go. Deep, Punchy Bass Featuring EXTRA BASS technology, these headphones have been designed to satisfy bass-heavy fanatics. The Bass Booster feature manages the noise reduction effectively, maintaining an acoustically-tight seal, giving you strict bass response and a warm bass sound on your tracks. Read more… Detailed & Dynamic Audio Enjoy your tracks in clear detail and wide-ranged audio due to the impressive performance of the lightweight 30mm neodymium dynamic driver units. Due to the delicate sensitivity of the diaphragm you can still enjoy a dynamic range with your music, even when played at louder volumes. Simple Adjusting The self-adjusting headband and padded ear cups cover the whole ear, giving you a comfortable long-listening experience. When not in use, simply swivel the ear cups flat so that they can safely fit into your bag or suitcase without taking up too much vital space. Built-in Mic Take and handle calls without having to remove the headphones. With a built-in button and mic on the cable, you can skip tracks and won't miss those all-important calls.