Lexus 2013 IS250C Owner's Manual page 297

Adjusting the Automatic Sound Levelizer (ASL)
Press .
The ASL switches between on and off modes each time
pressed.
ASL automatically adjusts the volume and tone quality according to the noise
level as you drive your vehicle.
Adjusting sound quality and volume balance
■
Changing sound quality modes
Press .
Pressing
"BAS""MID""TRE""FAD""BAL"
■ Adjusting sound quality
Press or
Mode Sound qual-
displayed
*
"BAS"
*
"MID"
*
"TRE"
"FAD"
"BAL"
*
: The sound quality level is adjusted individually in each audio mode.
changes the sound mode in the following order:
to adjust the level.
ity mode
Bass -5 to 5
Mid-range -5 to 5
Treble -5 to 5
Front/rear
volume F7 to R7
balance
Left/right
volume L7 to R7
balance
3-2. Using the audio system
Press 
Level
Low
Shifts to rear
Shifts to left
is
3
Press 
High
Shifts to front
Shifts to right
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