40
-EN
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 authorised Alpine dealer.
•
HPF (high pass filter): Cuts the lower frequencies and allows the
higher frequencies to pass.
•
LPF (low pass filter): Cuts the higher frequencies and allows the
lower frequencies to pass.
•
Slope: The level change (in dB) for a frequency change of one octave.
•
The higher the slope value, the steeper the slope becomes.
•
Adjust the slope to FLAT to bypass the HP or LP filters.
•
Do not use a tweeter without the HPF on or set to a low frequency, as
it may cause damage to the speaker due to the low frequency content.
Time
Difference
(msec)
Distance
(cm)
Distance
(inch)
Time
Difference
(msec)
Distance
(cm)
Distance
(inch)
0.0
0.0
0.0
5.1
173.4
68.3
0.1
3.4
1.3
5.2
176.8
69.7
0.2
6.8
2.7
5.3
180.2
71.0
0.3
10.2
4.0
5.4
183.6
72.4
0.4
13.6
5.4
5.5
187.0
73.7
0.5
17.0
6.7
5.6
190.4
75.0
0.6
20.4
8.0
5.7
193.8
76.4
0.7
23.8
9.4
5.8
197.2
77.7
0.8
27.2
10.7
5.9
200.6
79.1
0.9
30.6
12.1
6.0
204.0
80.4
1.0
34.0
13.4
6.1
207.4
81.7
1.1
37.4
14.7
6.2
210.8
83.1
1.2
40.8
16.1
6.3
214.2
84.4
1.3
44.2
17.4
6.4
217.6
85.8
1.4
47.6
18.8
6.5
221.0
87.1
1.5
51.0
20.1
6.6
224.4
88.4
1.6
54.4
21.4
6.7
227.8
89.8
1.7
57.8
22.8
6.8
231.2
91.1
1.8
61.2
24.1
6.9
234.6
92.5
1.9
64.6
25.5
7.0
238.0
93.8
2.0
68.0
26.8
7.1
241.4
95.1
2.1
71.4
28.1
7.2
244.8
96.5
2.2
74.8
29.5
7.3
248.2
97.8
2.3
78.2
30.8
7.4
251.6
99.2
2.4
81.6
32.2
7.5
255.0
100.5
2.5
85.0
33.5
7.6
258.4
101.8
2.6
88.4
34.8
7.7
261.8
103.2
2.7
91.8
36.2
7.8
265.2
104.5
2.8
95.2
37.5
7.9
268.6
105.9
2.9
98.6
38.9
8.0
272.0
107.2
3.0
102.0
40.2
8.1
275.4
108.5
3.1
105.4
41.5
8.2
278.8
109.9
3.2
108.8
42.9
8.3
282.2
111.2
3.3
112.2
44.2
8.4
285.6
112.6
3.4
115.6
45.6
8.5
289.0
113.9
3.5
119.0
46.9
8.6
292.4
115.2
3.6
122.4
48.2
8.7
295.8
116.6
3.7
125.8
49.6
8.8
299.2
117.9
3.8
129.2
50.9
8.9
302.6
119.3
3.9
132.6
52.3
9.0
306.0
120.6
4.0
136.0
53.6
9.1
309.4
121.9
4.1
139.4
54.9
9.2
312.8
123.3
4.2
142.8
56.3
9.3
316.2
124.6
4.3
146.2
57.6
9.4
319.6
126.0
4.4
149.6
59.0
9.5
323.0
127.3
4.5
153.0
60.3
9.6
326.4
128.6
4.6
156.4
61.6
9.7
329.8
130.0
4.7
159.8
63.0
9.8
333.2
131.3
4.8
163.2
64.3
9.9
336.6
132.7
4.9
166.6
65.7
5.0
170.0
67.0
Cut-off frequency
(1/3 octave steps)
Slope
Level
HPF
LPF
HPF
LPF
Subwoofer
(LPF)
----
20 Hz -
200 Hz
----
FLAT, –6,
–12, –18,
–24 dB/oct.
0 to
–12 dB
Rear
speaker
(HPF)
20 Hz -
200 Hz
----
FLAT, –6,
–12, –18,
–24 dB/oct.
----
0 to
–12 dB
Front
speaker
(HPF)
20 Hz -
200 Hz
----
FLAT, –6,
–12, –18,
–24 dB/oct.
----
0 to
–12 dB
Level
adjusting
(0 to –12 dB)
Output frequency
range
Output frequency
range
Slope adjusting
20 Hz
(Different from actual
display)
LPF cut-off
frequency
HPF cut-off
frequency
Low range
High range
Slope
FLAT
Subwoofer
Rear speaker
Front speaker
200 Hz
Summary of Contents for INE-W990BT
Page 97: ......
