Featuring dual phase push-pull drivers, the ATH-CKR100iS in-ear headphones deliver high-resolution audio that's true to the original sound. The unique push-pull system incorporates two facing 13 mm drivers that generate phase-aligned audio signals that are mixed to compensate for each driver's inefficiencies, while providing an equal and tailored response without artificial coloration. By reducing intermodulation distortion, the push-pull drivers deliver extended frequency response for life-like sound. The headphones' high-rigidity titanium housings reduce unwanted resonance, and their design positions the drivers for optimal performance, while ensuring a comfortable fit with excellent sound isolation. The performance is further enhanced by high-precision stabilizers that ensure linear diaphragm movement for faithful high-resolution audio reproduction. The headphones' detachable 1.2 m (3. 9') cable, with newly developed A2DC (Audio Designed Detachable Coaxial) connectors, is comprised of two separate star-quad cables (one dedicated to the left channel, the other to the right) to improve isolation from external noise and channel crosstalk. And the cable's in-line controller and microphone lets you easily answer calls and control music and video playback. Four sizes (XS, S, M, L) of interchangeable eartips are included to provide a customized fit and improve sound isolation.