For those who need a little more low-end response, the Super.fi 5 Pro EBs deliver the same professional-grade sound, noise isolation, and superb form factor as other earphones in the super.fi line, but with an increased bass sensitivity for deep and driving beats. Precise audio filters and an encapsulated diaphragm subwoofer ensure that the bass stays tight and distortion-free, never muddy. The Super.fi 5 series' dual-driver technology makes these earphones ideal for studio-grade acoustic performance while delivering an increased "thump" for those who like to really feel their music. Includes a metallic travel case.