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