How to select audio source
Short answer
Select the audio source in the Marshall Bluetooth app or by using the source button on top your speaker.
You can select the audio source in the Marshall Bluetooth app or by using the source button on your speaker:
Push the source button to toggle between Bluetooth, AUX and RCA audio source.
The LED indicator shows which source is selected.
Caution: Make sure that the volume is set to low on both the speaker and the audio source before using the speaker.