About the crossover – Alpine IVA-W505 User Manual
Page 57
55
-EN
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.
Time Correction Value List
About the Crossover
Crossover (X-OVER):
This unit is equipped with an active crossover. The crossover limits the
frequencies delivered to the outputs. Each channel is controlled
independently. Thus, each speaker pair can be driven by the frequencies
for which they have been optimally designed.
The crossover adjusts the HPF (high pass filter) or LPF (low pass filter)
of each band, and also the slope (how fast the filter rolls off the highs or
lows).
Adjustments should be made according to the reproduction
characteristics of the speakers. Depending on the speakers, a passive
network may not be necessary. If you are unsure about this point, please
consult your authorized Alpine dealer.
4.2ch (FRONT/REAR/SUBW.) mode
2.2ch (3WAY) mode
* Only when selecting User’s in “Setting the Response Slope for the
High Range Speaker (TW SETUP)” (page 51).
Delay
Number
Time
Difference
(ms)
Distance
(cm)
Distance
(inch)
Delay
Number
Time
Difference
(ms)
Distance
(cm)
Distance
(inch)
0
0.0
0.0
0.0
51
5.1
173.4
68.3
1
0.1
3.4
1.3
52
5.2
176.8
69.7
2
0.2
6.8
2.7
53
5.3
180.2
71.0
3
0.3
10.2
4.0
54
5.4
183.6
72.4
4
0.4
13.6
5.4
55
5.5
187.0
73.7
5
0.5
17.0
6.7
56
5.6
190.4
75.0
6
0.6
20.4
8.0
57
5.7
193.8
76.4
7
0.7
23.8
9.4
58
5.8
197.2
77.7
8
0.8
27.2
10.7
59
5.9
200.6
79.1
9
0.9
30.6
12.1
60
6.0
204.0
80.4
10
1.0
34.0
13.4
61
6.1
207.4
81.7
11
1.1
37.4
14.7
62
6.2
210.8
83.1
12
1.2
40.8
16.1
63
6.3
214.2
84.4
13
1.3
44.2
17.4
64
6.4
217.6
85.8
14
1.4
47.6
18.8
65
6.5
221.0
87.1
15
1.5
51.0
20.1
66
6.6
224.4
88.4
16
1.6
54.4
21.4
67
6.7
227.8
89.8
17
1.7
57.8
22.8
68
6.8
231.2
91.1
18
1.8
61.2
24.1
69
6.9
234.6
92.5
19
1.9
64.6
25.5
70
7.0
238.0
93.8
20
2.0
68.0
26.8
71
7.1
241.4
95.1
21
2.1
71.4
28.1
72
7.2
244.8
96.5
22
2.2
74.8
29.5
73
7.3
248.2
97.8
23
2.3
78.2
30.8
74
7.4
251.6
99.2
24
2.4
81.6
32.2
75
7.5
255.0
100.5
25
2.5
85.0
33.5
76
7.6
258.4
101.8
26
2.6
88.4
34.8
77
7.7
261.8
103.2
27
2.7
91.8
36.2
78
7.8
265.2
104.5
28
2.8
95.2
37.5
79
7.9
268.6
105.9
29
2.9
98.6
38.9
80
8.0
272.0
107.2
30
3.0
102.0
40.2
81
8.1
275.4
108.5
31
3.1
105.4
41.5
82
8.2
278.8
109.9
32
3.2
108.8
42.9
83
8.3
282.2
111.2
33
3.3
112.2
44.2
84
8.4
285.6
112.6
34
3.4
115.6
45.6
85
8.5
289.0
113.9
35
3.5
119.0
46.9
86
8.6
292.4
115.2
36
3.6
122.4
48.2
87
8.7
295.8
116.6
37
3.7
125.8
49.6
88
8.8
299.2
117.9
38
3.8
129.2
50.9
89
8.9
302.6
119.3
39
3.9
132.6
52.3
90
9.0
306.0
120.6
40
4.0
136.0
53.6
91
9.1
309.4
121.9
41
4.1
139.4
54.9
92
9.2
312.8
123.3
42
4.2
142.8
56.3
93
9.3
316.2
124.6
43
4.3
146.2
57.6
94
9.4
319.6
126.0
44
4.4
149.6
59.0
95
9.5
323.0
127.3
45
4.5
153.0
60.3
96
9.6
326.4
128.6
46
4.6
156.4
61.6
97
9.7
329.8
130.0
47
4.7
159.8
63.0
98
9.8
333.2
131.3
48
4.8
163.2
64.3
99
9.9
336.6
132.7
49
4.9
166.6
65.7
50
5.0
170.0
67.0
Cut-off frequency
(1/3 octave steps)
Slope
Level
HPF
LPF
HPF
LPF
Low range
speaker
----
20 Hz -
200 Hz
----
FLAT, 6,
12, 18,
24 dB/
oct.
0 to
–12 dB
Rear high
range
speaker
20 Hz -
200 Hz
----
FLAT, 6,
12, 18,
24 dB/oct.
----
0 to
–12 dB
Front high
range
speaker
20 Hz -
200 Hz
----
FLAT, 6,
12, 18,
24 dB/oct.
----
0 to
–12 dB
Cut-off frequency
(1/3 octave steps)
Slope
Level
HPF
LPF
HPF
LPF
Low
range
speaker
----
20 Hz -
200 Hz
----
FLAT, 6,
12, 18,
24 dB/oct.
0 to
–12 dB
Mid range
speaker
20 Hz -
200 Hz
20 Hz -
20 kHz
FLAT, 6,
12, 18,
24 dB/oct.
FLAT, 6,
12, 18,
24 dB/oct.
0 to
–12 dB
High
range
speaker
1 kHz -
20 kHz,
(20 Hz ~
20 kHz)*
----
FLAT*
6, 12, 18,
24 dB/oct.
----
0 to
–12 dB
Low range
High range
(Different from actual display)
Low range
Mid range
High range
(Different from actual display)