JVC Kenwood JVC around ear headphones HA-XM30X (japan import) I realize the bass playing of large and powerful "Extreme Deep" bus port and large-diameter 57mm driver unit of the new design I adopt a strong "tough" rubber protector of the elastomer material to external shocks By burden to the ear is small and may be used for a long time wearing image, to block out the sound wraps comfortably the whole ear, you can enjoy the deep bass of the force.