No sound or too quiet
In the Bluetooth settings menu of your mobile device, make sure your device is connected to Highway.
Make sure Highway is not in pairing mode.
If you are using the auxiliary input, make sure the plugs are firmly seated in the jacks.
Check the volume setting on your mobile device or check the display to see what is playing.
Source:
https://static.digitecgalaxus.ch/Files...
Chapter Troubleshooting or Troubleshooting