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Time
Delay
Difference
Number
(msec)
75
7.5
76
7.6
77
7.7
78
7.8
79
7.9
80
8.0
81
8.1
82
8.2
83
8.3
84
8.4
85
8.5
86
8.6
87
8.7
88
8.8
89
8.9
90
9.0
91
9.1
92
9.2
93
9.3
94
9.4
95
9.5
96
9.6
97
9.7
98
9.8
99
9.9
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.
2WAY mode
Cut-off frequency
(1/3 octave steps)
HPF
LPF
Low
20 Hz -
range
----
200 Hz
speaker
Rear
high
20 Hz -
----
range
200 Hz
speaker
Distance
Distance
(cm)
(inch)
255.0
100.5
258.4
101.8
261.8
103.2
265.2
104.5
268.6
105.9
272.0
107.2
275.4
108.5
278.8
109.9
282.2
111.2
285.6
112.6
289.0
113.9
292.4
115.2
295.8
116.6
299.2
117.9
302.6
119.3
306.0
120.6
309.4
121.9
312.8
123.3
316.2
124.6
319.6
126.0
323.0
127.3
326.4
128.6
329.8
130.0
333.2
131.3
336.6
132.7
Slope
Level
HPF
LPF
FLAT,
6, 12, 18,
0 to
----
24
−12 dB
dB/oct.
FLAT,
6, 12, 18,
0 to
----
24
−12 dB
dB/oct.
Cut-off frequency
(1/3 octave steps)
HPF
LPF
Front
high
20 Hz -
----
range
200 Hz
speaker
Low range
(Different from actual display)
3WAY mode
Cut-off frequency
(1/3 octave steps)
HPF
LPF
Low
20 Hz -
range
----
800 Hz
speaker
Mid
20 Hz -
20 Hz -
range
800 Hz
20 kHz
speaker
High
1 kHz -
range
----
*
20 kHz
speaker
* Depending on the response characteristics of the speaker, care should
be taken when setting the response slope of the high range speaker to
FLAT in 3WAY mode, as speaker damage may result (page 24).
Low range
Mid range
(Different from actual display)
Level adjusting
(0 to −12 dB)
Output frequency range
20 Hz
HPF cut-off
LPF cut-off
frequency
frequency
Notes
• 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.
Slope
Level
HPF
LPF
FLAT,
6, 12, 18,
0 to
----
24
−12 dB
dB/oct.
High range
Slope
Level
HPF
LPF
FLAT,
0 to
----
6, 12
−12 dB
dB/oct.
FLAT,
FLAT,
0 to
6, 12
6, 12
−12 dB
dB/oct.
dB/oct.
FLAT,
0 to
6, 12
----
−12 dB
dB/oct.
High range
Slope FLAT
Slope adjusting
(Different from actual display)
23
-EN
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