Specifications and Details Frequency Response: 20Hz - 20kHz Impedance: 14Ω Sensitivity: 85dB/mW Weight: 453g (without cable) Cable: Silver foil processed OFC (Oxygen-Free Copper), approx. 1.5m Earpiece Connector: Dual 3.5mm TS plug Audio Plug: 3.5mm (6.35mm adapter included) Ear Housing: Carbon fiber Color: Black Accessories Headphone unit Cable Conversion plug Protective storage case Inspection certificate The "cs97u" headphones employ a self-developed 1-micrometer diaphragm and 0.2-micrometer silver alloy wiring. While maintaining astonishing analytical power, they achieve a vast and uniform lateral soundstage, making them a highly versatile headphone currently. By utilizing carbon fiber parts in various sections of the headphone body, the weight has been further reduced. This results in a comfortable fit that is less fatiguing even during extended wear. Carbon fiber is lightweight and highly rigid, simultaneously improving the strength and durability of the housing.