In-Ear Audiophile-Quality Speaker System: Four balanced-armature drivers in each earphone deliver a smooth, extended response, explosive dynamic realism and fatigue-free sound. Connectivity Technology : Wired Ideal Balance and Accuracy: A three-way phase-coherent crossover design achieves perfect linear phase performance resulting in a natural, fully dimensional soundstage, lightning-fast transients and crystalline transparency Proprietary cable design utilizes two layers of star-pattern wires (Kevlar Silk, silver and OFC copper wires) with ground-breaking technologies to achieve incredibly accurate sound reproduction