2007 Chevrolet Malibu Owner's Manual - Page 248

Setting the Tone (Bass/Midrange/Treble) TONE /P/Q (Bass/Treble): Press and release this button until BASS, MID (midrange), or TREB (treble) displays. Turn the ADJ knob to increase or to decrease the tone. The display shows the bass, mid, or treble level. If a station is weak or has static, decrease the treble. To adjust bass, midrange, or treble to the middle position, select BASS, MID, or TREB. Then press and hold the tone button for more than two seconds. The display level adjusts to the middle position and a beep sounds. To adjust all tone controls to the middle position, press and hold the tone button when no tone control displays. ALL CENTERED displays and a beep sounds. AUTO TONE/AUTO EQ (Automatic Equalization): Press this button to select customized equalization settings designed for country, jazz, talk, pop, rock, and classical. The equalization setting last chosen displays when you first press this button. Each time you press this button, another equalization setting displays and automatic tone or automatic equalization switches to that preset equalization settings. To return to the manual mode, press the AUTO TONE or AUTO EQ button until CUSTOM displays. Then manually adjust the bass, midrange, and treble using the tone button. 248