Volvo 2005 S80 Operation And Care Manual page 103

Switch on/off
Press the knob to switch on or turn off the radio.
Volume control
Turn the knob clockwise to increase volume. Volume control is electronic and does not have an end stop. If you have
a key pad in the steering wheel, increase or decrease the volume with the + or- buttons.
Volume control - ALARM
If a CD is playing when the radio receives an alarm bulletin (available in certain areas only), the CD player enters
pause mode. The bulletin is broadcast at the volume selected for this type of message.
After the bulletin has been completed, the audio system reverts to the originally selected sound source (radio or CD),
which is played at the volume that was selected for that source.
If the bulletin volume is adjusted while the bulletin is being broadcast, this new volume is saved and used for
subsequent bulletins.
Bass
Adjust the bass by pressing the button to extend the control and turning it to the left (less bass) or to the right (more
bass). A "detent" indicates "equalized" bass. Press the button back in when you have made the adjustment.
Treble
Adjust the treble by pressing the button to extend the control, pulling it out as far as possible, and then turning it to the
left (less treble) or to the right (more treble). A "detent" indicates "equalized" treble. Press the button back in when you
have made the adjustment.
MID EQ level
This function is used to fine-tune the balance of sound in the speakers. To set the level:
1. Press SOURCE.
2. Turn the SOURCE knob, select ADVANCED MENU and press SOURCE.
3. Turn the SOURCE knob, select AUDIO SETTINGS and press SOURCE.
4. Turn the SOURCE knob, select MID EQ LEVEL and press SOURCE.
5. Turn the SOURCE knob, select the desired level and press SOURCE.
6. Press EXIT.
pg. 156 Radio functions HU-650/HU-850