2009 Toyota Corolla Owners Manual - Page 188

3-2. Using the audio system n Adjusting sound quality and volume balance Turning Mode displayed BAS*1 MID*1, 2 TRE*1 FAD adjusts the level. Sound quality mode Bass Midrange Treble Front/rear volume balance Left/right volume balance Turn to the left Turn to the right Level -5 to 5 -5 to 5 -5 to 5 F7 to R7 Low High Shifts to rear Shifts to front BAL L7 to R7 Shifts to left Shifts to right *1:The sound quality level is adjusted individually in each radio mode or CD mode. *2:JBL brand audio system 222