2011 Lexus IS 350 Owners Manual - Page 251
2011 Lexus IS 350 Manual
Page 251 highlights
3-2. Using the audio system Adjusting the Automatic Sound Levelizer (ASL) Press . is 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 n Changing sound quality modes Press Pressing . changes the sound mode in the following order: "BAS"→"MID"→"TRE"→"FAD"→"BAL" n Adjusting sound quality Press Mode displayed "BAS"* "MID"* "TRE"* "FAD" or to adjust the level. Level -5 to 5 -5 to 5 -5 to 5 F7 to R7 Shifts to rear Shifts to front Low High Press ∨ Press ∧ Sound quality mode Bass Mid-range Treble Front/rear volume balance Left/right volume balance "BAL" L7 to R7 Shifts to left Shifts to right *: The sound quality level is adjusted individually in each audio mode. 260