THESE WHITE COLOUR PX 100 HEADPHONES ARE RARE AND RATHER WONDERFUL HIGH-END AUDIOPHILE SOUNDING PORTABLE HEADPHONES. HARDLY NO LISTENING FATIGUE. FOR MY OWN PERSONAL USE I HAVE PAIRED WITH A SHANLING M0 PORTABLE (PHOTO FOR ILLUSTRATION PURPOSES AND PLAYER/CDS (WHEN TRANSFERED INTO WAV FILES) NOT INCLUDED ) MUSIC PLAYER BRINGS THAT BRINGS OUT THE BEST OUT OF THESE HEADPHONES.
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