Alpine IVA-D300 - Manual (Page 40)

38
-EN
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.
Adjusting and Storing/Recalling the Bass Focus
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.
Setting item: BASS FOCUS
Setting contents: 0-99
1 Touch [ ] of BASS FOCUS.
The screen changes to the BASS FOCUS setup screen.
2 Set the delay number in the front and rear as well as on
the right and left by touching either button [;] or [:] of
the front, rear, right and left speakers.
3 Repeat the Step 2 above to set another channel
(speaker).
4 Touch [RETURN] to return to the previous screen.
• Any manual time correction adjustments will also affect
corrections made for bass focus.
Storing Adjusted Contents
The following operation is performed after Step 4 above.
5 Touch [MEMORY].
6 Within 5 seconds, touch any one of preset buttons
[P.SET 1] through [P.SET 6] on the BASS ENGINE
screen.
The adjusted contents are stored on the P.SET number
you touch.
• The stored contents on the P.SET number remain undeleted despite
a following reset operation or disconnection of the battery power
cord.
• Adjusted/set contents of each setting item in Bass Engine can be
stored in the preset buttons (1 through 6).
Recalling the Adjusted and Stored Contents
Following operation is performed after Step 4 above.
5 Touch any one of [P.SET 1] to [P.SET 6] on the BASS
ENGINE screen.
Recall the adjusted and stored contents.
Time Difference Table
Number of
Steps
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Time
Difference
(ms)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
Number of
Steps
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
Time
Difference
(ms)
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6.0
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
7.0
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
8.0
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
9.0
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
Distance
cm (inch)
174.9 (68-7/8")
178.4 (70-1/4")
181.8 (71-9/16")
185.2 (72-7/8")
188.7 (74-1/4")
192.1 (75-5/8")
195.5 (77")
198.9 (78-5/16")
202.4 (79-11/16")
205.8 (81")
209.2 (82-3/8")
212.7 (83-3/4")
216.1 (85-1/16")
219.5 (86-3/8")
223.0 (87-3/4")
226.4 (89-1/8")
229.8 (90-1/2")
233.2 (91-13/16")
236.7 (93-3/16")
240.1 (94-1/2")
243.5 (95-7/8")
247.0 (97-1/4")
250.4 (98-9/16")
253.8 (99-7/8")
257.3 (101-1/4")
260.7 (102-5/8")
264.1 (104")
267.5 (105-5/16")
271.0 (106-11/16")
274.4 (108-1/16")
277.8 (109-3/8")
281.3 (110-3/4")
284.7 (112-1/16")
288.1 (113-1/16")
291.6 (114-3/4")
295.0 (116-1/8")
298.4 (117-1/2")
301.8 (118-13/16")
305.3 (120-3/16")
308.7 (121-1/2")
312.1 (122-7/8")
315.6 (124-1/4")
319.0 (125-9/16")
322.4 (126-7/8")
325.9 (128-5/16")
329.3 (129-5/8")
332.7 (131")
336.1 (132-5/16")
339.6 (133-11/16")
Distance
cm (inch)
0.0
3.4 (1-3/8")
6.9 (2-3/4")
10.3 (4-1/16")
13.7 (5-3/8")
17.2 (6-13/16")
20.6 (8-1/8")
24.0 (9-7/16")
27.4 (10-13/16")
30.9 (12-3/16")
34.3 (13-1/2")
37.7 (14-13/16")
41.2 (16-1/4")
44.6 (17-9/16")
48.0 (18-7/8")
51.5 (20-1/4")
54.9 (21-5/8")
58.3 (22-15/16")
61.7 (24-1/4")
65.2 (25-5/8")
68.6 (27")
72.0 (28-3/8")
75.5 (29-11/16")
78.9 (31-1/16")
82.3 (32-3/8")
85.8 (33-3/4")
89.2 (35-1/8")
92.6 (36-7/16")
96.0 (37-3/4")
99.5 (39-13/16")
102.9 (40-1/2")
106.3 (41-7/8")
109.8 (43-1/4")
113.2 (44-9/16")
116.6 (45-7/8")
120.1 (47-5/16")
123.5 (48-5/8")
126.9 (49-15/16")
130.3 (51-5/16")
133.8 (52-11/16")
137.2 (54")
140.6 (55-3/8")
144.1 (56-3/4")
147.5 (58-1/16")
150.9 (59-3/8")
154.4 (60-3/4")
157.8 (62-1/8")
161.2 (63-7/16")
164.6 (64-3/4")
168.1 (66-3/16")
171.5 (67-1/2")