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Rotary encoder

SOURCE/POWER

X-OVER Adjustment

1 Check that defeat mode is off.

2 Press SOURCE/POWER.

The main menu is displayed.

3 Press 4 (A.PROC).

A.PROC (Audio processor) list display appears.

4 Turn the Rotary encoder to select “X-OVER.” 5 Press 1 (SETUP L/R) or 2 (SETUP L+R).

X-OVER adjustment display appears.

L/R: Different adjustment values can be set for the left and right channels.

L+R: Sets the same adjustment values for the left and right channels.

6 Turn the Rotary encoder to select the speaker to be set.

7 Press the function button to adjust the selected speaker.

FREQ. ;DN/UP:: Adjust the H.P.F. or L.P.F. cutoff

frequency.

The adjustable bands differ according to the channel (speaker).

SLOPE ;DN/UP:: Adjust the H.P.F. or L.P.F. slope.

LEVEL ;DN/UP:: Adjust the level.

8 Repeat steps 6 and 7 to adjust other channels.

9 Press 7 (RETURN) to return to the previous display.

Performing Time Correction Manually (TCR)/ Swithing the Phase

Because of the particular conditions inside the vehicle, there can be major differences in the distances between the various speakers and the listening position. It is possible to calculate the optimum correction values and eliminate the time error at the listening position yourself using this function. You can also use this function to switch the phase.

1 Check that Defeat mode is off.

2 Sit in the listening position (the driver’s seat, for example) and measure the distance (in meters) between your head and the various speakers.

3 Calculate the difference in distance between the farthest speaker and the other speakers.

L = (distance of farthest speaker)

– (distance of other speakers)

4 Divide the distances calculated for the different speakers by the speed of sound (343 m/s temperature 20°C).

This value is the time correction value for the various speakers.

Concrete examples

Calculating the time correction value for the front left speaker on the diagram below.

Conditions:

Distance between farthest speaker and listening position: 2.25 m (88-3/4")

Distance between front left speaker and listening position:

0.5m (20")

Calculation:

L = 2.25 m (88-3/4") – 0.5 m (20")= 1.75 m (68-3/4") Compensation time = 1.75 ÷ 343 x 1000 = 5.1 (ms)

In other words, setting the time correction value for the front left speaker to 5.1 (ms) sets a virtual distance matching the distance to the farthest speaker.

5.1ms 0.5m

2.25m

•When the speaker is set to the “OFF” mode, X-OVER for that speaker cannot be set. Refer to “Setting the Speakers” (page 45).

•Check the playback frequencies of the connected speakers before adjusting.

•In order to protect the speakers, there is no OFF setting for the subwoofer low pass filter (the slope remains the same).

•Even if Tweeter is selected for FRONT 1, the filter OFF (slope OFF) of the H.P.F. can be set. If the slope is set to OFF, speakers may be damaged. Take care with this setting.

The sound is uneven because the distance between the listening position and the different speakers is different. The difference in the distance between the front left and rear right speakers is 1.75 meters (68-3/4").

Time correction eliminates the difference between the time required for the sound from the different speakers to reach the listening position.

Setting the time correction of the front left speaker to 5.1 ms makes it possible to coordinate the distance from the listening position to the speaker.

46-EN

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Image 48
Alpine IVA-D901 owner manual Over Adjustment, Performing Time Correction Manually TCR/ Swithing the Phase, 46-EN
Page 47 Page 49

IVA-D901 specifications

The Alpine IVA-D901 is a highly regarded in-dash multimedia receiver designed to elevate the in-car entertainment experience. With its sleek design and advanced technology features, it caters to the needs of modern drivers and passengers alike. The unit supports a wide range of media formats, allowing users to enjoy their favorite music and videos on the go.

One of the standout features of the IVA-D901 is its 7-inch motorized touchscreen display. This high-resolution LCD screen offers impressive clarity and color, making it easy to navigate through menus and control media playback. The touchscreen is highly responsive, providing an intuitive interface that enhances user experience. Additionally, the motorized function allows the screen to elegantly retract when not in use, contributing to its aesthetic appeal.

The IVA-D901 stands out with its extensive connectivity options. It supports both Bluetooth and USB connections, facilitating hands-free phone calls and wireless audio streaming. This makes it incredibly convenient for users who wish to maintain focus on the road while still enjoying their favorite tracks. Moreover, the unit is compatible with various external devices, enabling seamless integration with smartphones and tablets.

Another notable characteristic of the IVA-D901 is its versatility in media playback. It is designed to play DVDs, CDs, and a variety of video files, including MP4 and DIVX. The built-in DVD player enhances the multimedia experience, allowing passengers to enjoy movies during road trips. Additionally, the receiver also supports AM/FM radio, providing traditional entertainment options.

Users also benefit from the advanced tuning capabilities of the IVA-D901. Its built-in DSP (Digital Signal Processing) allows for customizable sound settings, ensuring that audio can be tailored to individual preferences. This feature creates a more immersive listening experience, as adjustments can be made based on the acoustics of the vehicle.

In terms of expansion, the Alpine IVA-D901 is equipped with multiple preamp outputs, allowing for the easy addition of amplifiers or subwoofers. This flexibility enables users to enhance their sound system to achieve the desired audio performance.

To sum up, the Alpine IVA-D901 is a powerful multimedia receiver that combines stunning visuals, extensive connectivity, and high-quality audio capabilities. It’s a perfect choice for those who seek luxury and functionality in their in-car entertainment setup.
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