Toyota PRIUS Owner's Manual page 266

TREB "+" or "–": Adjusts high- pitched
tones.
MID "+" or "–" (Type 1 only): Adjusts
mid- pitched tones.
BASS "+" or "–": Adjusts low- pitched
tones.
"FRONT" or "REAR": Adjusts sound bal-
ance between the front and rear speakers.
"L" or "R": Adjusts sound balance be-
tween the left and right speakers.
"OK": The previous screen returns.
250
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 differ-
ent mixes of treble, mid- range and bass.
A good balance of the left and right stereo
channels and of the front and rear sound
levels is also important.
Keep in mind that if you are listening to
a stereo recording or broadcast, changing
the right/left balance will increase the vol-
ume of one group of sounds while de-
creasing the volume of another.
26p261
Type 1
Type 2