Logitech Super.Fi 5 Pro Extended Bass Earphones (Discontinued by Manufacturer) For R&B, hip-hop, and jazz lovers, the SuperFi 5 Extended Bass (EB) earphones deliver an increased bass sensitivity for deep and driving beats; Precise audio filters and an encapsulated diaphragm subwoofer A low-frequency 13 mm diaphragm speaker pumps out deep, rich bass, while a precision-balanced armature speaker gives you extended high-frequency response and a full sound stage Integrated passive-crossover directs the sound frequencies (low to high) to the appropriate speaker; Audio filters shape the sound for the closest experience to custom personal monitors available Exclusive Immersion sound signature is tuned to provide a 3-D sound stage that makes you feel as though you are experiencing the quality, energy and emotion of a live performance Earphones fit comfortably inside your ear to create a secure seal to block outside noise by up to 16 dB