Panasonic RPHXC40K Wired Headphones foram lançados pela primeira vez em 24 de dezembro de 2013. Esta versão dos fones de Panasonic RPHXC40K Wired Headphones tem um tamanho de driver de 30, impedância de 32 Ohms, sensibilidade de 116 dB e uma resposta de frequência de 10Hz-25.000Hz, proporcionando uma experiência acústica mais clara e nítida .
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