Audio-Technica ATH-CK400I Wired Earphones于 2018 年 1 月 31 日首次发布。此版本的Audio-Technica ATH-CK400I Wired Earphones具有 8.8 驱动器尺寸、16 欧姆阻抗、100 dB 灵敏度和 20Hz-20,000Hz 的频率响应，提供更清晰、更锐利的声学体验。
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