Alpine iLX-507E - Page 33

ALPINE iLX-F509E 68-41657Z84-A (EN)ALPINE iLX-F509E 68-41657Z84-A (EN)
33-EN
• Adjustment should be made according to the reco
crossover frequency of the connected speakers. Det
recommended crossover frequency of the speaker
to a frequency range outside that recommended m
damage to the speakers.
For the recommended crossover frequencies of Alpi
speakers, refer to the respective Owner’s Manual.
We are not responsible for damage or malfunctio
caused by using the crossover outside the recomm
About Time Correction
The distance between the list
vary widely due to the complex speaker plac
difference in the distances from the speakers t
creates a shift in the sounds image and frequency
characteristics. This is caused by the time dela
sound reaching the listener’s right versus the lef
To correct this, this unit is able to dela
the speakers closest to the listener. This effectiv
perception of increased distance f
listener can be placed at an equal distance betw
and right speakers for optimum staging.
The adjustment will be made f
steps.
Example 1. Listening Position: F
Left Seat
Adjust the time correction level of the front lef
high value and the rear right to zero or a low v
The sound is not balanced because the distanc
the listening position and the var
The difference in distance between the front lef
and the rear right speaker is 1.75 m (68-7/8”).
Here we calculate the time correction value f
speaker in the diagram on the above.
Conditions:
Farthest Speaker – list
Front left speaker – list
Calcula
Time correc
∗ Speed of sound: 343 m/s (765 mph) at 20°C
In other words, giving the front left speaker a time
correction value of 5.1 ms makes it seem as if its distance
from the listener is the same as the distance to the farthest
speaker.
Time correction eliminates the differences in the time
required for the sound to reach the listening position.
The time of the front left speaker is corrected by 5.1 ms so
that its sound reaches the listening position at the same
time as the sound of other speakers.
Example 2. Listening Position: All
Seats
Adjust the time correction level of each speaker to almost
the same level.
1 Sit in the listening position (driver’s seat, etc.)
and measure the distance (in meters)
between your head and the various speakers.
2 Calculate the difference between the distance
correction value to the farthest speaker and
the other speakers.
L = (distance to farthest speaker) – (distance to other
speakers)
These values are the time correction values for the
different speakers. Setting these values to make each
sound reach the listening position at the same time as
the sound of other speakers.