Sony MDR-CD2000 CD Series Headphones (Discontinued by Manufacturer) High quality closed-front open-back headphones create a wide and open sound stage Large 50 mm drivers provide noticeably deeper bass 25 mm urethane earpads give exceptional comfort Aura-Nomic design driver faces the eardrum for enhanced sound Single-sided, 11-1/2 foot LC-OFC Litz cord