Alpine D900 Owners Manual - Page 25

Example of Steps 2 and 3 Setting 1 After entering corrections for the front (left and right) speakers in STEP 15, the time difference is 1.5 ms for both front-left and front-right speakers. 1.5ms 1.5ms ∗ 2 After entering corrections for the left (front and rear) speakers in STEP 15, the time difference becomes 3.0 ms* for the front left speaker and 1.5 ms for the left rear speaker. * Because the time difference was already set to 1.5 ms for the front left speaker in STEP 1, the additional correction in STEP 15 makes the time difference of the front left speaker 3.0 ms. 3.0ms 1.5ms 1.5ms 1.5ms ∗ 1.5ms Tips * Subwoofer speaker Delay (turn the rotary encoder) the audio signal to the front (left and right) speakers to make the apparent position of the subwoofer to be at the front. In doing this, the apparent position between the front (left and right) speakers and subwoofer will appear equal to the driver. After performing above, you can change the positions of left and right speakers by delaying the time. Time Correction Setting item: TIME CORRECTION Setting contents: TIME DN/UP/FRONT-LEFT/FRONT-RIGHT/ REAR-LEFT/REAR-RIGHT Before performing the following procedures, refer to "About the Time Correction" (page 22). Selecting the speaker: Select the speaker among 3 (FRONT-LEFT) through 6 (REAR-RIGHT). Adjusting the time correction value: Press 1 (TIME ;DN) or 2 (TIME UP:) to adjust the time correction value (0.0 to 9.9). Adjusting the Built-in Crossover Setting item: CROSSOVER Setting contents: LPF DN / UP / HPF DN / UP The High and Low Pass Filters on this unit can be adjusted to suit your personal taste. LPF (Setting the Low Pass Filter): Press 1 (LPF ;DN) or 2 (LPF UP:) to adjust LPF. FLAT (OFF) ↔ 80Hz ↔ 120Hz ↔ 160Hz Outputs all frequencies lower than that selected according to your preference. (Only available when using the subwoofer output from this unit.) • When the subwoofer output of this unit is turned OFF, LPF and phase are deactivated. HPF (Setting the High Pass Filter): Press 3 (HPF ;DN) or 4 (HPF UP:) to adjust HPF. FLAT (OFF) ↔ 80Hz ↔ 120Hz ↔ 160Hz Outputs all frequencies higher than that selected according to your preference. • If HPF, LPF, bass control and treble control are all set to ON, depending on the bass control and treble control settings, you may not be able to reinforce the sound effect. • Except when the HPF and LPF is turned OFF, the subwoofer is in monaural mode. Subwoofer On and Off 1 Press SOURCE/POWER. The main menu is displayed. 2 Press 4 (A.PROC). The A.PROC (Audio processor) list screen is displayed. 3 Turn the Rotary encoder to select "SUBWOOFER." 4 Press the Function button to select your desired setting. OFF: Subwoofer output is off. 0°: Subwoofer output is off, and the phase is 0°. 180°: Subwoofer output is on, and the phase is 180°. 23-EN