Chevrolet 2002 Corvette Owner's Manual page 192

Setting the Tone (Bass/Treble)
BASS: To adjust the bass, press this knob lightly so it
extends. Turn the knob clockwise to increase bass and
counterclockwise to decrease bass.
TREB (Treble): To adjust the treble, press this knob
lightly so it extends. Turn the knob clockwise to
increase treble and counterclockwise to decrease treble.
If a station is weak or noisy, you may want to decrease
the treble.
Push these knobs back into their stored positions when
you're not using them.
AUTO TONE: This feature allows you to choose
bass and treble equalization settings designed
for country/western, jazz, talk, pop, rock and
classical stations.
Each time you press the AUTO TONE button, this
feature will switch to one of these program types.
To return the bass and treble to the manual mode,
either press and release the AUTO TONE button until
the display goes blank or press and release the BASS
and TREB knob and turn it until the display goes blank.
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Adjusting the Speakers (Balance/Fade)
BAL (Balance): To adjust the balance between the right
and left speakers, press this knob lightly so it extends.
Turn the knob clockwise for the right speakers and
counterclockwise for the left speakers. The middle
position balances the sound between the speakers.
FADE: To adjust the fade between the front and rear
speakers, press this knob lightly so it extends. Turn the
knob clockwise to adjust the sound to the front speakers
and counterclockwise for the rear speakers. The middle
position balances the sound between the speakers.
Push these knobs back into their stored positions when
you're not using them.
Playing a Cassette Tape
Your tape player is built to work best with tapes that are
up to 30 to 45 minutes long on each side. Tapes longer
than that are so thin they may not work well in this
player. If a tape is inserted when the ignition is on but
the radio is off, the tape will begin playing. A tape
symbol is shown in the center of the graphic display
whenever a tape is inserted. When a tape is active, the
tape symbol will be accompanied by a direction arrow.