Alpine PXA-H701 owner manual Settings/Adjustments, 8-EN, Concrete examples

Check that the defeat mode is off. (See page 28.)

Settings/Adjustments

TCR/PHASE

CHANNEL

ENTER

•Concrete examples

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

Rotary encoder

Performing time correction manually (TCR)/Switching the phase

Because of the particular conditions inside the vehicle, there are major differences in the distances between the different speakers and the listening position. The proper time correction can be obtained using the automatic time correction function (“AUTO TCR”), but it is also 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.

Conditions:

Distance between farthest speaker and listening position: 2.25 m (88-3/4") Distance between front left speaker and listening position: 0.5 m (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 operating with head units such as the IVA- D300 series, the adjustment is different depending on the head unit.

1

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)

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

5.1ms makes it possible to coordinate the distance from the listening position to the 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 different speakers.

5 Press the TCR/PHASE button to set the time correction mode.

8-EN