Volvo 2006 C70 - Manual (Page 159)

The system will automatically start the next time the key is turned to position I.
Turn the volume dial or use the buttons in the optional steering wheel keypad to adjust the volume level. The volume
level is also adjusted automatically according to the vehicle's speed, see
page 177 for more information on this
function.
Steering wheel keypad
The four buttons on the steering wheel keypad can be used to control the audio system. The steering wheel keypad can
be used to adjust volume, shift between preset stations and change CD tracks. Press one of the two left-hand buttons
briefly to change to the next/previous preset radio station, or to go to the next/previous track on a CD. Press and hold
down these buttons to search within a track on a CD.
Daytime/twilight display
In daylight the information is displayed against a light background. In darkness it is displayed against a dark
background.
Sound source
A sound source can be selected by pressing AM/FM (2) or CD (3). Press AM/FM repeatedly to toggle between FM1,
FM2, and AM. The currently selected sound source will be shown in the display.
Sound settings
Press SOUND (5). Press this button repeatedly until you come to the setting that you wish to change.
Turn the TUNING dial (4) to make the desired setting.
The following settings can be made:
BASS-set the bass level
TREBLE-set the treble level
BALANCE-set the left/right sound balance
FADER-set the front/rear sound balance
SUBWOOFER (option)-set the level for the subwoofer (bass speaker)
pg. 177 Audio
Audio functions
CENTER
1
-make settings for the center speaker
SURROUND
1
-make settings for surround sound
Subwoofer (option)
To switch the subwoofer on or off:
Press MENU followed by ENTER.