Alpine HDS-990 HDS-990 Owners Manual - Page 15

10 kinds of typical equalizer settings are preset at the factory for a variety of audio sources.  After adjusting the bass/treble or the parametric equalizer, the "Custom" item will be displayed.  Only one preset sound effect can be selected at a time. Sound Settings Select [Sound Settings] from the main settings page. Refer to step 2 of "Setup Operation" (page 11). Sound settings Treble Bass Subwoofer Parametric EQ Balance Fader Input source volume Time correction X-Over Sound memory  Sound setting page 11).  Treble/bass page 1 Turn the encoder to the left to select [] to increase the level. You can select the treble or bass adjustment level according to your preferences. Setting item: treble/bass Setting content: -7～+7 (initial value: 0) Subwoofer Settings Select [Subwoofer] from the sound setting page. Refer to step 1 of "Sound Settings" (page 11). Subwoofer ON/OFF Phase Level  Subwoofer page The following steps 1 to 3 are common to each "setting item" in the "sound effect setting". 1 Rotate the encoder up and down to select the target item, then short press the encoder to select the target item to adjust. 2 Press to return to the previous menu mode. 3 Press to release the setting mode. Treble/Bass Setting Select [Treble or Bass] from the sound setting page. Refer to step 1 of "Sound Settings" (page 12 EN 1 Rotate the encoder to select the target item, then short press the encoder to select the target item to adjust. 2 Turn the encoder to the left to select [] operation. Turn on/Off the Subwoofer When the subwoofer is turned on, you can adjust the phase output level of the subwoofer. Setting items: heavy bass