Buick 2003 LeSabre Owner's Manual page 181

Setting the Tone (Bassnreble)
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
pushing the AUDIO knob until the display goes blank.
Then push and hold AUDIO for more than two seconds
until you hear a beep. ALL CENTERED will appear
on the display.
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
between the right and the left speakers.
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
between the front and rear speakers.
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 pushing the
AUDIO knob until the display goes blank. Then press 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 choose bass, mid
and treble equalization settings designed for different
program types.
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