Self Developed Ultra-Linear Dynamic Driver Unit. Moondrop has designed a new 10mm ULT super linear dynamic driver unit that features a DLC composite diaphragm coil. The driver features a composite magnetic circuit that creates a powerful magnetic force inside the cavity allowing for swift movement of the driver coil. 3rd Generation DLC Composite Diaphragm. Moondrop has featured a 3rd generation DLC(Diamond-Like Carbon) composite diaphragm coil in the latest Kato IEMs. This diaphragm is made up of three different materials with different characteristics including DLC. DLC provides it high-rigidity, high damping coefficient. It is lightweight and sturdy. Professionally Designed Front Cavity. Moondrop has designed Kato earpieces with the help of volume and structure simulation by Finite Element Analysis Simulation. Combined with high-frequency phase guide components on the driver, the front cavity arrangement in Kato is superior to other so-called special tuning components. Replaceable Ear Sound Nozzle. Moondrop has designed Kato with a replaceable ear nozzle design. They have included two sets of sound nozzles in the package, made with different materials(Steel & Brass). Self-Developed Patented Acoustic Filter In Nozzle. Moondrop Kato has a brand-new third-generation patented anti-blocking filter integrated on the ear nozzle. It prevents oily ear wax from blocking the filters and is more conducive to mid and high-frequency sound. Earphone Specification : Name: KATO flagship advanced technology Driver: 10mm-ULT dynamic driver Diaphragm: the 3rd generation DLC composite Socket: 0.78-2Pin sunken design Housing: MIM stainless steel Nozzle: stainless steel *2, brass *2 Cable plug: 3.5mm stereo single-ended plug Frequency response range: 10Hz-45kHz Effective frequency response range: 20Hz-20kHz (IEC60318-4, -3dB) Impedance : 32Ω ±15%（@1KHz） Sensitivity: 123dB/Nrms (@1KHz) Distortion: < 0.15% (@1khz, AES17 20khz, A-weight)