A quick way to mute is usually hold something down for a few seconds. If the gain knobs or any other knob can be pressed in then holding them in will probably mute it. Mute is usually something you can get to quickly and not buried in a menu.
Glad you sorted it!
EDIT: Yup, the mute buttons are a ‘push and hold’ quick access.
Knobs and Functions
The EON700 comes equipped with push button rotaries to make for easy navigation and hardware usage.
• A single press of the MAIN/MENU knob will open up the main menu.
• Pressing and holding the MAIN/MENU knob for 2s will mute the SPEAKER.
• Pressing and holding a CHANNEL KNOB for 2s will mute the CHANNEL
A monitor speaker with a 28 page user guide, if that is indicative of how over engineered modern items are, i dont know what is… i just want an XLR input and a volume control lol.