Lexus 2003 LS Owner's Manual page 647

Audio System
(c) Tone and balance
How good an audio program sounds to you
is largely determined by the mix of the treble,
mid–range, and bass levels. In fact, different
kinds of music and vocal programs usually
sound better with different mixes of treble,
mid–range, and bass.
A good balance of the left and right stereo
channels and of the front and rear sound lev-
els is also important.
Keep in mind that if you are listening to a ste-
reo recording or broadcast, changing the
right/left balance will increase the volume of
one group of sounds while decreasing the
volume of another.
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UNG607
Touching the "SOUND" switch on the
screen displays the sound adjustment
screen.
UNG608
BASS "+" or "–": Adjusts low–pitched
tones.
MID "+" or "–": Adjusts mid–pitched tones.
TREB "+" or "–": Adjusts high–pitched
tones.
"Front" or "Rear": Adjusts sound balance
between the front and rear speakers.
"L" or "R": Adjusts sound balance between
the left and right speakers.
"OK": The previous screen returns.