A remarkable fusion of design and performance, the ATH-AVC400 SonicPro Over-Ear Headphones are meticulously engineered to elevate your music and movie experiences. Boasting large 53mm drivers, these headphones deliver crystal clear, yet robust mid-low frequency reproduction, immersing you in every beat and dialogue. The unique bass-reflex port in each housing further enhances your audio experience by producing an expansive, resonating low-end sound. This feature, combined with the soft, contoured earpads, not only ensures hours of comfortable listening but also aids in maintaining the deep bass sound by providing effective sound isolation. Designed with user convenience in mind, these headphones come with a self-adjusting headband support mechanism. This innovative feature automatically adjusts to your head size, offering you the most comfortable and secure fit possible. The ATH-AVC400 SonicPro Over-Ear Headphones also come equipped with a generous 3.0 m (9.8') cable, complete with a 3.5 mm (1/8") gold-plated stereo mini-plug and a 6.3 mm (1/4") adapter. This allows you to seamlessly connect the headphones to a wide range of home or portable audio components, ensuring your favorite tunes are always within reach. In essence, the ATH-AVC400 SonicPro Over-Ear Headphones are a perfect blend of comfort, performance, and versatility, designed to deliver an unparalleled audio experience.