2008 Volvo S40 Owner's Manual - Page 209

acoustics, the seating position of the listener, etc., for each combination of vehicle and audio system. There is also dynamic calibration that takes into account the setting of the volume control, radio reception, and the vehicle's speed. The sound settings described in this manual, such as BASS, TREBLE, and EQUALIZER are only intended to enable the user to adapt sound reproduction to his/her personal preferences. 1. Press SOUND (5). Press this button repeatedly until you come to the setting that you wish to change. 2. Turn the TUNING dial (4) to make the desired setting. The following settings can be made: BASS-set the bass level TREBLE-set the treble level BALANCE-set the left/right sound balance FADER-set the front/rear sound balance SUBWOOFER (accessory)-set the level for the subwoofer (bass speaker) CENTER 1 -make settings for the center speaker SURROUND 1 -make settings for surround sound 1 Premium Sound System only Subwoofer (accessory) To switch the subwoofer on or off: 1. Press MENU followed by ENTER . 2. Select AUDIO SETTINGS and press ENTER . 3. Select SUBWOOFER and press ENTER . Surround sound Surround sound settings are used to balance sound levels throughout the vehicle. Surround settings for the various sound sources are made separately. NOTE Dolby Surround Pro Logic II is only available on the Premium Sound system. When listening to FM radio stations, Dolby Surround Pro Logic II functions best in areas with strong reception. If reception is weak, selecting 2 or 3-channel stereo may provide better sound quality. The Dolby symbol will be appear in the display when Dolby Pro Logic II is activated. There are three alternative settings: Pro Logic II 3-channel Off (normal 2-channel stereo)