Pontiac Vibe 2003 Owner's Manual page 158

Setting the Tone (Bass/Treble)
AUDIO: Press the AUDIO knob until BASS, MID or
TREB appears on the display. Turn the 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 TREB and press and
hold the AUDIO knob. The radio will produce one beep
and adjust the display level to zero.
To adjust all tone and speaker controls to the middle
position, press and hold the AUDIO knob when no tone
or speaker control is displayed. The radio will produce
one beep and CENTERED will appear on the display.
AUTO EQ (Automatic Equalization): Press this
button to choose between bass, midrange and treble
equalization settings.
To return to the manual mode (CUSTOM), press the
AUTO EQ button until CUSTOM appears on the
display. Then you will be able to manually adjust the
bass, midrange and treble using the AUDIO knob.
Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance between the right and the
left speakers, press the AUDIO knob until BAL appears
on the display. Turn the knob to move the sound toward
the left or the right speakers.
To adjust the fade between the front and the rear
speakers, press and hold the AUDIO knob until FAD
appears on the display. Turn the knob to move the sound
toward the front or the rear speakers.
To adjust the balance and fade to the middle position,
select balance or fade and press and hold the AUDIO
knob. The radio will beep once and will adjust the
display level to the middle position.
To adjust all tone and speaker controls to the middle
position, press and hold the AUDIO knob when tone
or speaker controls are not displayed. The radio will
produce one beep and CENTERED will appear on
the display.
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