Headphone AmplifierPHA-3AC

When connecting to a computer, there is no sound or the sound is not played back properly.

  • The computer does not recognize the headphone amplifier as a USB device.
    Restart your computer.
    Install the driver software for Windows “Sony USB Device Driver” on your Windows computer.
  • Turn up the volume of your computer or software.
  • If the headphone amplifier was connected to the computer while using audio playback software, restart the audio playback software.
  • When playing High-Resolution Audio format files on your computer with the headphone amplifier, use the audio playback software compatible with the High-Resolution Audio format files, such as “Hi-Res Audio Player.”

    When an audio playback software is not installed, install it on your computer.

  • If the computer enters standby, sleep, or hibernation mode, while the music is played back by using the audio playback software, restart the audio playback software.
  • Check that the sound device settings of your computer are correct.
    • Windows 8/8.1:
      Press and hold the [Windows] and [X] keys to display the menu, select the [Control Panel], [Hardware and Sound], [Sound], [Playback] tab, select [Sony PHA-3] for the playback device, then click [Set default].
    • Windows 7/Windows Vista:
      Click the [Start] menu, select the [Control Panel], [Hardware and Sound], [Sound], [Playback] tab, select [Sony PHA-3] for the playback device, then click [Set default].
    • Macintosh:
      Click the [Apple] menu, select the [System Preferences], [Sound], [Output] tab, then select [PHA-3] for [Select a device for sound output].
  • The volume control of your computer or the audio playback software is set to mute. Cancel the setting.
  • The CD-ROM drive does not support the digital reproduction function. Use a CD-ROM drive that supports the digital reproduction function.
  • Digitally broadcast sound may not be output from a computer’s USB port. In this case, connect the AUDIO IN/LINE OUT jack of the headphone amplifier to the analog audio output of the computer.