Controls
Short answer
Use the controls on top of the speaker to connect your device to Acton IV, turn it on and off, adjust the sound and control your music.
Power switch
Use the power switch to turn the speaker on or off.
Source selector
Use the source selector button to select input source. Select Bluetooth® then push and hold until the LED starts blinking for Bluetooth pairing.
Audio controls
Adjust the volume, bass, and treble.
Customisable M-button
Push the M-button to get the music started with Spotify Tap. Go to the Marshall app to change the M-button function.
Media control
Play, pause, or change track when playing via Bluetooth.
