2001 Buick Century Owner's Manual - Page 158

Setting the Tone BASS: Press this knob lightly so it extends. Turn the knob to increase or decrease bass. TREB: Press this knob lightly so it extends. Turn the knob to increase or decrease treble. If a station is weak or noisy, you may want to decrease the treble. Push these knobs back into their stored positions when you're not using them. Adjusting the Speakers BAL: Turn the control behind the upper knob to move the sound to the left or right speakers. The middle position balances the sound between the speakers. FADE: Turn the control behind the lower knob to move the sound to the front or rear speakers. The middle position balances the sound between the speakers. AM-FM Stereo with Cassette Tape Player (If Equipped) Playing the Radio VOLUME: This knob turns the system on and off and controls the volume. To increase volume and turn the radio on, turn the knob clockwise. Turn it counterclockwise to decrease volume. 3-12