24
-EN
Example of Bass Focus 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.
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.
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.
1.5ms
1.5ms
∗
∗
1.5ms
1.5ms
3.0ms
1.5ms
1.5ms
Time Difference Table
0
0.0
14
1.4
28
2.8
1
0.1
15
1.5
29
2.9
2
0.2
16
1.6
30
3.0
3
0.3
17
1.7
31
3.1
4
0.4
18
1.8
32
3.2
5
0.5
19
1.9
33
3.3
6
0.6
20
2.0
34
3.4
7
0.7
21
2.1
35
3.5
8
0.8
22
2.2
36
3.6
9
0.9
23
2.3
37
3.7
10
1.0
24
2.4
38
3.8
11
1.1
25
2.5
39
3.9
12
1.2
26
2.6
40 - 98
4.0 - 9.8
13
1.3
27
2.7
99
9.9
Number
of Steps
Time
Difference
(ms)
Number of
Steps
Time
Difference
(ms)
Number of
Steps
Time
Difference
(ms)
The sound is not balanced because the distance between the
listening position and the various speakers is different.
The difference in distance between the front left speaker and
the rear right speaker is 1.75 m (68-7/8").
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.
In other words, giving the front left speaker a time correction
value of 5.1 ms makes it seem as if the distance to the front left
speaker is the same as the distance to the farthest speaker.
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 to
the farthest speaker and the other speakers.
L = (distance to farthest speaker) – (distance to other
speakers)
3
Divide the distances calculated for the speakers by
the speed of sound (343 m/s (765 mph) at 20˚C).
These values are the time correction values for the
different speakers.
Bass Focus
Setting item: BASS FOCUS
Setting contents: TIME DN / UP / FRONT / LEFT / RIGHT /
REAR
The time difference between the front-rear/left-right speakers, can be
adjusted at the same time. With an initial delay of 0.1 ms for each of
the 0 to 99 steps, audible time correction can be done.
Selecting the speaker:
Select the speaker among
3
(
FRONT
) through
6
(
REAR
).
Setting the step:
Press
1
(
TIME
;
DN
) or
2
(
TIME UP
:
) to set the step.
• Any manual time correction adjustments will also affect
corrections made for bass focus.
Содержание IVA-D900R
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