About The Crossover - Alpine CDA-9886M Owner's Manual

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 uptimally designed.
The crossover adjusts the HPF (high pass tilter) or LPF (low pass tilter)
uf each band. and also the slope (how fast the tiller rolls off the highs or
lows).
Adjustments should be made according to the reproduction
characteristics of the speakers. Dependi ng 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/REARISUBW.) mode
Cut-off frequency
(1/3 octave steps)
HPF LPF
20 Hz-
Low range
-._.
speaker
200 Hz
Rear high
20 Hz-
----
range
200 Hz
speaker
Front high
20 Hz-
----
range
200 Hz
speaker
Low range
A
(Different from actual display)
2.2ch (3WAY) mode
Cut-off frequency
(1/3 octave steps)
HPF LPF
Low
20 Hz-
----
range
200 Hz
speaker
Midrange 20 Hz- 20 Hz-
speaker
200 Hz 20 kHz
1 kHz-
High
20 kHz,
----
range
(20 Hz-
speaker
20 kHz)*
*
Only when selecting User's in "Setting the Response Slope for the
High Range Speaker (TW Sell/I') " (page
(Different from actual display)
Slope
Level
HPF LPF
FLAT, 6,
Oto
----
12,18,
-12 dB
24 dB/oct.
FLAT. 6,
Oto
----
12,18.
-12 dB
24 dB/oct.
FLAT,6,
o
to
----
12,18,
-12 dB
24 dB/oct.
High range
Slope
Level
HPF
LPF
FLAT, 6,
o
to
.--- 12,18.
-12 dB
24 dB/oct.
FLAT, 6, FLAT, 6,
o
to
12, 18, 12,18,
-12 dB
24 dB/oct. 24 dB/oct.
FLAT*
o
to
----
6,12,18,
-12 dB
24 dB/oct.
3/).
Level adjusting
(0 to -12 dB) Output frequency range ..
. .
,
I
-----J.":;J:,~--~I£~7:.:....-------.
/ :
I
,
I
20 Hz
HPF cut-off LPF cut-off
frequency frequency
• HPF (high passjilter): ClIIS the lowerfrequencies and allows the
higher frequencies to pass.
• LPF (low pass filter): Cuts the higher frequencies lind allows the
lowe frequencies to pass.
I'
• 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 FLAT to bypass the HP or LP filters.
to
• Do not use a tweeter without the HPF on or set to a lowfrequency. liS
it may cause damage to the speaker due
• You Call/lOt adjust the crossover frequency higher than the HPF or
lower than the LPF.
• Adjustment should be made according to the recommended crossover
frequency of the connected speakers. Determine the recommended
ClVssover frequency of the speakers. Adjusting to afrequency range
olllside that recommended //lay cause damage to the speakers.
For the recommended crossover frequencies olAlpine speakers. refer
to the respective Owner's Manual.
We are not responsible for damage or malfunction ofspeakers caused
by using the crossover outside the recommended value.
'
Slope FLAT
iX
Slope adjusting
: (Different from actual display)
to the low frequency content,
35-EN