Optimal sound reproduction

The audio system is pre-calibrated for optimal sound reproduction using digital signal processing.
This calibration takes into account factors such as the speakers, amplifier, cabin acoustics, the listeners' seating positions, etc., for each combination of vehicle/infotainment system.
There is also a dynamic calibration that takes into consideration the volume level, radio reception, and the speed of the vehicle.
The settings that are described in this manual, (Bass, Treble, Equalizer etc.) are only intended to enable the user to adapt sound reproduction to his/her personal tastes.
See also:
Side windows and laminated panoramic roof
To ensure that the air conditioning works optimally,
the side windows, and the laminated
panoramic roof should be closed. ...
Fault tracing and actions
If the message Radar blocked See manual is displayed, this means that the radar
signals from the sensor have been obstructed and that a vehicle ahead cannot be
detected.
This, in turn, means that ...
Children should be seated safely
Volvo recommends the proper use of restraint
systems for all occupants including children.
Remember that, regardless of age and size, a
child should always be properly restrained in a
vehicle.
...
