I need someone to share that audio knowledge

[thumb5]

...If you set the Devialet's input sensitivity too lowhigh, music will play louder and you'll drive the amp into clipping on the loudest passages, if you set the  input sensitivity level too highlow, music will be softer, possibly too soft...

Minor correction highlighted (based on the normal definition of sensitivity).  For the avoidance of doubt: when using the configurator, higher numbers in the "max input level" field correspond to lower sensitivity and vice versa.