Dedicated to pumping gobs of quality low end directly into your ears, Sony MDR Extra Bass headphones feature Advanced Direct Vibe Structure to emphasize even the sub-bass. Three over-ear models, MDR-XB400, MDR-XB600 and MDR-XB800, go up in price and frequency range along with the numbers, and for in-ear, there’s the MDR-XB60EX. Word is, these are hot, delivering massive bass without undue high end loss. The flat, serrated-finish cord’s tangle-free promise is a bonus.