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2001 Volvo S80
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.
Wavelength selector
Turn "SOURCE" knob to select FM or AM. The station and wavelength are displayed. You can also
select cassette deck, CD or CD changer, if connected, with this knob.
Active sound control (ASC)
The ASC (Active Sound Control) automatically adapts volume to vehicle speed.
Press the ASC button (HU-611) or the PTY button (HU-801) for several seconds to switch this function
ON or OFF.
This function is included in the Advanced User Mode on the HU-801 equipped with this feature.
"ASC ON" or "ASC OFF" will be shown in the display for several seconds.
pg.133 Audio systems HU-611/HU-801
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