Redefining the boundaries of sonic excellence utilizing Sonion drivers in a cutting-edge six driver architecture. The Spartacus is designed to provide the most immersive and breathtaking listening experience. Each one crafted is crowned with a unique organic fiber composite faceplate. Specs Composite resin body with unique organic fiber composite faceplate Integrated stainless steel wax guard Six driver arrangement One Sonion ultra high balanced armature Two Sonion bone conductors One Sonion mid-bass balanced armature Two Sonion bass and ultra bass balanced armatures Impedance less than 35 ohms Hand-assembled and matched Sensitive enough for use with most smartphones as well as portable amps and daps Noble Audio detachable cable with industry standard 2-pin configuration (0.78mm diameter) and interchangeable terminations (2.5mm, 3.5mm and 4.4mm)