The MK2 models have adopted the cable-exchangeable structure as well as the case holder made from aluminum aiming at user-friendliness and wearing comfort when listening to music. Exchangeable cable structureThe exchangeable cable structure of recent trend for high-quality headphone has been employed. This enables the prospective correspondence to a high-definition cable, and the easy maintenance to sudden disconnection, thus improving the user-friendliness of earspeaker. Case holder made from aluminum The change of material has enabled the mechanism design with more high flexibility. In the MK2 models, changing the case holder design from conventional linear style into moderate curve form produces the effect that ear pads fit more naturally on both-sides-of-the-head part. Moreover, the curve form gives high rigidity and prevents from generating unnecessary distortion or twist at the time of wearing, resulting in the great improvement of fit feeling. In an open-air type earspeaker, the degree rise of adhesion at the time of wearing greatly contributes to the improvement of low-frequency reproduction. Specifications Fixed electrode: MLER (Multi Layer Electrodes) Attached cable conductor: 6N(99.9999%)OFC + silver plated annealed copper wire Ear pad: genuine sheep leather (skin touching portion), artificial leather (surrounding portion) Weight: 371g、508g (including cable) Type: push-pull electrostatic sound element, open-air type enclosure Sound element shape: oval Frequency response: 7 - 41,000Hz Electrostatic capacitance: 110pF Impedance: 145k Ω Sound pressure sensitivity: 101dB Bias voltage: 580V DC Cable: parallel 6-strand, low-capacity wide cable Cable length: 2.5m full length