Audio-Technica ATH-CKR90iS In-Ear Headphones (Open Box) - Discontinued xlr-4 male 5U4G vacuum tube x 2

5U4G vacuum tube x 2

the plug): 16

4 Knowles Drivers and 2 Sonion Drivers each side

Wi-Fi connectivity

Audio-Technica ATH-CKR90iS In-Ear Headphones (Open Box) - Discontinued xlr-4 male 5U4G vacuum tube x 2Audio technica ATH CKR90iS Earphones Featuring dual phase push pull drivers of different diameters (13 mm and 10. 4 mm), the Audio technica ATH CKR90iS Earphones deliver amazingly clear Hi Res Audio. In the unique push pull system, the drivers face each other, but are wired out of phase, providing lower harmonic distortion and improved damping and bass frequency control. The use of drivers with different diameters improves high frequency response. The