Alpine HDS-990 HDS-990 Owners Manual - Page 16

Setting content: OFF/ON (initial setting) Setting the Subwoofer Phase The subwoofer phase is set to 0 ° (normal phase) or 180 ° (reverse phase). To adjust the phase, turn the knob. Setting items: subwoofer phase Setting content: 0°(initial setting)/180° Setting the Subwoofer Level When the subwoofer is turned on, you can adjust the output level of the subwoofer. Setting item: subwoofer level Setting content: 0～+15 (initial value: 9) Parametric EQ Setting Select [Parametric EQ] from the sound setting page. Refer to step 1 of "Sound Settings" (page 11).  Parametric EQ page 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. 3 If you need to adjust another band, press to return to band selection, and then turn the knob to select a band. You can modify the equalizer settings to make the response curve more in line with your preferences. Select Band Setting content: Band 1 → Band 2 Band 9/Band 10→Band 1 Adjust frequency Rotate the encoder, select "Frequency", and then press the knob momentarily. Adjustable frequency band: 20H～20kHz Band1: 20Hz～63Hz(31Hz) Band2: 31Hz～125Hz(63Hz) Band3: 63Hz～315Hz(125Hz) Band4: 125Hz～500Hz(250Hz) Band5: 250Hz～1kHz(500Hz) Band6: 500Hz～2kHz(1kHz) Band7: 1kHz～4kHz(2kHz) Band8: 2kHz～7.2kHz(4kHz) Band9: 5.8kHz～12kHz(8kHz) Band10: 9kHz～20kHz(16kHz） Adjust Q value Rotate the encoder, select "Q value", and then short press the knob. Setting content:0.404~28.85 (Initial value: 3.056) Adjust the gain Rotate the encoder, select "Gain", and then press the knob momentarily. Setting content:-12dB～+12dB（Initial value：0）  The frequency setting value of each band cannot exceed the frequency value of adjacent bands.  When adjusting the parametric equalizer, the frequency response of the connected speakers should be considered.  When adjusting the parametric equalizer, the preset equalizer that has been adjusted will be invalid.  After adjusting the parametric equalizer, the preset equalizer displays "Custom". Left and Right Balance Setting of Speaker Output Select [Balance] from the sound setting page. Refer to step 1 of "Sound Settings" (page 11).  Left and right balance page 13 EN