Specifications Size & Weight Weight Approx. 9.0g General Features Headphone Type Closed, Quad Balanced Armature Driver Unit Quad balanced armature Impedance (Ohm) 24ohms(at 1kHz) Frequency Response 5Hz-40000Hz Sensitivi...

Highlight Quad BA system Size & Weight Approx. 9.0g Sony's original design BA Driver Units General Features Closed, Quad Balanced Armature High level sound isolation Light housing Preformed ear hanger for stable fit