Lexus IS F 2012 Owner's Manual page 274

3-2. Using the audio system
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
Mode
displayed
*
"BAS"
*
"MID"
*
"TRE"
"FAD"
"BAL"
*
: The sound quality level is adjusted individually in each audio mode.
274
.
.
changes the sound mode in the following order:
or to adjust the level.
Sound qual-
ity mode
Bass
Mid-range
Treble
Front/rear
volume
balance
Left/right
volume
balance
Press 
Level
-5 to 5
-5 to 5 Low
-5 to 5
F7 to R7 Shifts to rear
L7 to R7 Shifts to left
is
Press 
High
Shifts to front
Shifts to right