Note

• The headphone amplifier only supports the audio playback function of a WALKMAN.
• Turn on your WALKMAN before operating the headphone amplifier.
• Some operations may not be possible with the headphone amplifier, even if you use a supported WALKMAN.
• Do not unplug the cable during playback, otherwise playback will become unavailable. If this happens, restart the headphone amplifier or reconnect the cable to the WALKMAN.
• The following settings of your WALKMAN may cause sound distortion. Set these settings off to solve the problem.
  • Dynamic Normalizer
  • Equalizer
  • VPT (Virtualphones Technology)
  • DSEE (Digital Sound Enhancement Engine)
  • Speaker output optimizer
• Sound is not output from the headphone jack of the WALKMAN when it is connected to the headphone amplifier.
• You cannot adjust the volume with the WALKMAN when it is connected to the headphone amplifier.
• You can charge the connected WALKMAN and the headphone amplifier at the same time. Charge the headphone amplifier using the recommended USB AC adaptor (AC-UD10) (sold separately) and connect the WALKMAN with the digital cable for WALKMAN (supplied).
• If you are listening to music too loudly, the battery may drain even if the DC IN 5V port of headphone amplifier is connected to a computer or an AC outlet.
• The WALKMAN/Xperia/computer connection INPUT port has priority when multiple devices are connected to the WALKMAN/Xperia/computer connection INPUT port and the iPhone/iPad/iPod connection INPUT port at the same time.
• Some WALKMAN have the volume control for [Music, video, games, & other media] in their setting menu. If it is set as small, the sound from the headphone amplifier may be small or it may make no sound.
• The battery life of the connected WALKMAN is shorter when it plays back High-Resolution Audio format files.