Buick 2005 Century Owner's Manual page 155

Setting the Tone (Bass/Treble)
AUDIO: Push and release AUDIO until BASS, MID,
or TREBLE appears on the display. Then turn the
AUDIO knob to increase or to decrease. If a station is
weak or noisy, you may want to decrease the treble.
To adjust bass, midrange, or treble to the middle
position, select BASS, MID, or TREBLE. Then push and
hold AUDIO for more than two seconds until you hear
a beep. BASS and a zero, MID and a zero, or TREBLE
and a zero will appear on the display.
To adjust both tone controls and both speaker controls
to the middle position, end out of audio mode by
waiting five seconds without making any changes.
Then push and hold AUDIO for more than two seconds
until you hear a beep. ALL CENTERED will appear
on the display.
EQ (Equalizer): Press this button to select customized
equalization settings designed for country/western,
jazz, talk, pop, rock, and classical.
Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance between the right
and the left speakers, push and release AUDIO until
BAL appears on the display. Then turn the AUDIO knob
to move the sound toward the right or the left speakers.
A bar graph with indicators will show how the sound
is balanced.
To adjust the fade between the front and the rear
speakers, push and release AUDIO until FADE appears
on the display. Then turn the AUDIO knob to move the
sound toward the front or the rear speakers. A bar graph
with indicators will show how the sound is balanced.
To adjust balance or fade to the middle position, select
BAL or FADE. Then push and hold AUDIO for more than
two seconds until you hear a beep. The indicator will be
centered on the display.
To adjust both tone controls and both speaker controls to
the middle position, end out of audio mode by waiting
five seconds without making any changes. Then push
and hold AUDIO for more than two seconds until you hear
a beep. ALL CENTERED will appear on the display.
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