Experience bass like never before with these groundbreaking Extra Bass headphones. Engineered to reproduce ultra-low frequencies, they deliver deep, hard-hitting bass from 30mm drivers. Say goodbye to your old headphones and hello to the massive power of the MDR-XB300 Extra Bass headphones. Designed to create astoundingly deep bass tones within the confines of a comfortable ear cushion, these babies really thump. From the powerful 30mm diaphragm driver units to the incredibly high level of sound isolation, the Extra Bass headphones deliver the dramatic bass effects you crave.