Lexus RX330 2005 Owner's Manual page 288

Adjusting the sound balance and selecting the listening seat
position is also important for good an audio sound.
Keep in mind that if you are listening to a stereo recording or
broadcast, changing the sound balance or listening seat
position will increase the volume of one group of sounds while
decreasing the volume of another.
Each time you push the "AUDIO CONTROL" knob, the
mode changes as in the following.
POS: Select one of the following listening seat positions.
1: Front seat priority mode
2: Rear seat priority mode
3: All seats mode
4: Driver seat priority mode
BAS: Adjusts low−pitched tones.
MID: Adjusts mid−pitched tones.
TRE: Adjusts high−pitched tones.
FAD: Adjusts the sound balance between the front and rear
speakers.
BAL: Adjusts the sound balance between the right and left
speakers.
ASL: Turns on or off the Automatic Sound Levelizer.
Finish
AUDIO
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