titanium alloy, suitable material to reproduce a sound with a sense of speed is adopted for the front housing part, and by adopting a lightweight aluminum material excellent in acoustic characteristics for the body, a clear sound and a feeling of wearing without stress are secured. Attached cable is removable. The highly reliable φ2.5 plug connection method is adopted for the connection part. proprietary spiral cable that is less likely to be tangled and has less cable core breakage, and has excellent durability. With thorough production control is performing precise quality control and balance adjustment by Made in JAPAN.

SkIS is a 6kHz sound suppressing system which is carefully designed and achieved by the spatial volume behind diaphragm, the venthole on driver frame and spatial volume of driver cap.The air behind diaphragm acts like a spring supporting diaphragm vibration. SkIS carefully suppresses air movement behind diaphragm which acts on 6kHz sound range only and not effecting on other sound ranges.