FiiO FH1s In Ear Monitors Hybrid Driver for Unmatched Sound Quality The FiiO FH1s is equipped with a Knowles 33518 Balanced Armature driver, a large 13.6mm dynamic driver unit which provides a brilliant sound quality with smooth and transparent treble response, quick and punchy bass, and lush and lifelike vocals. The sound output is crisp, detailed, and balanced. The dynamic driver is made of bio-polymer diaphragm and driven by an extremely robust N50 magnet. Celluloid Designed Faceplates on Ergonomic Shells The earpieces of FiiO FH1s are made up of a high-quality material transparent shells, which have a celluloid pattern faceplate design. Each unit of FiiO FH1s has got its own custom celluloid pattern, making each piece unique to each other. The shells have an ergonomic design providing you the best fit and comfort. Comfortable Pressure Relief Technology and very easy to drive The FiiO FH1s has a low impedance of 26ohms and a higher sensitivity of 106dB, which makes them very easy to drive. The precisely tuned balanced pressure relief system equalizes the air pressure in the front and back of the body, greatly enhancing the sound stage and reducing your ear’s fatigue when listening. 120-Core High-Purity Mono Crystalline Copper Cable The FiiO FH1s comes with a 120-core high purity monocrystalline copper cable that offers a seamless connection between the source and the earpieces and it comes with a 0.78mm two-pin connector type. Features Dual Driver Hybrid setup, One Knowles 33518 Balanced Armature Driver and One 13.6mm graphene Dynamic Driver unit Impedance: 26 ohms Sensitivity: 106dB Frequency response range: 5Hz-40kHz 120-Core high-purity monocrystalline copper cable with 2-Pin 0.78mm connectors Celluloid designed unique faceplates