The Westone Series of earphones will take your personal listening to new levels. The Westone Series of universal fit earphones offers ergonomically designed earphones with high end sound. The Quad Driver Westone 4 R Series is the top of the Westone line. The Westone 4 R Series will take your listening experience to an entirely different level. Four symmetrically balanced armature drivers engineered into an advanced three way crossover network deliver breathtaking clarity, realism and imaging. The 4 R Series incorporates a micro driver balanced armature dual low frequency, single mid and single high frequency driver system with acoustic symmetry +/ 2dB acoustically matched earpieces. Plus, Westone"s True Fit technology provides superior ergonomics and comfort. The Epic Removable Cable with a low profile audiophile grade two pin connector has high strength and an ultra low resistance tensile wire design with Aramid fiber.