Panasonic RPHXC40K Wired Headphones于 2013 年 12 月 24 日首次发布。此版本的Panasonic RPHXC40K Wired Headphones具有 30 个驱动器尺寸、32 欧姆阻抗、116 dB 灵敏度和 10Hz-25,000Hz 的频率响应，提供更清晰、更锐利的声学体验.
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