2007 Volvo S40 Owner's Manual - Page 186
2007 Volvo S40 Manual
Page 186 highlights
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 212 10 Audio Audio functions Off (normal 2-channel stereo) Activating/deactivating Surround sound 1. Press MENU followed by ENTER . 2. Select AUDIO SETTINGS in the menu and press ENTER . 3. Select Surround FM/AM/CD/AUX and press ENTER . 4. Select PRO LOGIC II, 3-channel stereo or OFF and press ENTER . Equalizer Front/Rear This function is used to fine-tune the sound level for different frequencies separately. NOTE This function is only available on certain sound systems. To adjust the equalizer settings: 1. Press MENU followed by ENTER . 2. Select AUDIO SETTINGS in the menu and press ENTER . 3. Select EQUALIZER FRONT/REAR and press ENTER . The column in the display indicates the sound level for the current frequency.