Volvo V70 - Manual (Page 257)

2007 Volvo V70
After the bulletin has been completed, the audio system reverts to the originally selected sound.
Volume control - Subwoofer (option)
Turn the knob clockwise to increase volume. Turn the knob counterclockwise to lower volume or switch
off the subwoofer. When the knob is in the middle, bass effect is "equalized".
pg. 230 Audio
Radio functions HU-650/HU-850
Sound settings
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 and turning it to the left (less treble), or to
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