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.
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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.