Article ID : 00156655 / Last Modified : 24/08/2016

How to troubleshoot low sound levels, being unable to raise the volume, or other lack of sound issues

Applicable Products and Categories of This Article

IMPORTANT: If model-specific information is needed to complete these steps, refer to the instructions supplied with the product.

To troubleshoot the issue, check the following.

  • For a low sound or no sound issue
    • When music files on your computer are being played back, check that the audio output settings of your computer, such as Bluetooth® settings, etc., are set correctly
    • If your unit is connected to a Bluetooth device, try pairing the connected device with the unit once more
    • Move metallic objects away from the speaker
    • If your device is connected using a cord, temporarily unplug the cord and then firmly reconnect it to the terminals of the connected device and the speaker
    • If headphones are connected, try disconnecting the headphones
    • Depending on the product, ducts at the bottom of speakers may be covered by seals. Check whether they have been removed
  • Cannot increase the volume
    • Some of the Sony portable audio players are designed to limit the volume level with the Automatic Volume Limiter System (AVLS). The AVLS function is preset to ON. Although it is recommended to leave the AVLS setting on to protect the hearing of the listener, maximum volume cannot be achieved until the AVLS feature is turned Off.

      NOTE: The procedure to turn the AVLS feature off varies by model. Some units have an AVLS switch, whereas other units offer the AVLS setting in the menu of the portable player. Consult the instruction manual of your portable player for specific information.

    • If you are using external passive speakers, the power and volume for the speakers are drawn from the connected unit. Adjust the volume setting on your portable player in order to increase the level of sound coming through the speakers
  • If the issue is not resolved
    • Try turning the unit off and back on. If there is a RESET function, perform a RESET. Refer to the operating instructions that came with product for further information.