2009 Lexus IS 350 Owners Manual - Page 241

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. Changing the listening position (type A only) The sound feel setting can be changed to produce the best sound for each listening position. Press (position selector) to change the setting. is pressed. The display changes as follows each time Display "DRIVER" "FRONT" "REAR" "ALL" Listening position Position best suited to the driver's seat Position best suited to the driver's and front passenger seats Position best suited to the rear seats Position best suited to all seats Adjusting sound quality and volume balance n Changing sound quality modes Press Pressing *: Type B only changes the sound mode in the following order. "BAS"→"MID"→"TRE"→"FAD"→"BAL"→"SURROUND"* 242