Alpine PXA-H800 - About the Crossover; Adjusting X-Over and Switching the Phases

From
a
PC
• After the setting,
it
is recommended to store the setting contents on
the unit. For details, refer to
"Storing
the Preset Values (Preset
Store)"
(page 12).
Displaying
the data
1
Click
[Show
All
Data].
The setup values
for
all
the
channels will
be
displayed.
About
the
Crossover
(X-Over)
Crossover (X-Over):
This unit is equipped with an active crossov
er
. 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 authoriz
ed
Alpine dealer.
Cutoff frequency adjustment range
(1/6 octave steps)
HPF LPF
2
0H
z
to
1
8k
Hz
22
Hz to
2
0kH
z
Front High
1kHz to
18kHz
1 .1kHz to
2
0kHz
(Tweeter
on
ly) (Tweeter o
nly
)
Front Mid
20Hz
to 18kHz
22
Hz to
2
0kH
z
Front Low
20Hz
to 18kHz
22Hz
to
20kHz
Rear
20Hz
to 18kHz
22Hz
to
20kHz
Center
20Hz
to 1
8kHz
22
Hz
to
20k
Hz
Subwoofer
20Hz
to
180Hz
22Hz
to
200Hz
Level adjustment
(0
to
-12 dB) Output frequency range
20Hz
(Different from
actual
display)
HPF cut-off LPF cut-off
frequency frequency
• HPF
(high
pas
s filte
r):
Cuts
the lower
fr
e
qu
encies
and
allows the
higher frequencies to pass.
•
LPF
(low pass filter):
Cuts
the
hi
gher
fr
equencies
and
allows the
low
er
fr
equencies to pass.
• Slop
e:
Th
e level change (in
dB)for
a
fr
equency change
of
on
e octave.
26-EN
•
The higher the slope value, the steeper the slope becomes.
• Adjust the slope to FLAT
(0 dB/oct) 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.
•
You
cannot adjust the crossover frequency higher than the
HPF
or
low
er
than the
LPF.
• Adjustment should
be
made according to the
re
commended crossover
frequency
of
the connected speakers. Determine the recommended
crossover frequency
of
the speakers. Adjusting to a frequency range
outside that recommended
ma
y cause damage to the speakers.
For the recommended crossover frequencies
of
Alpine speakers, refer
to the respective Owner's Manual.
We
are not responsible
for
damage
or malfunction
of
speakers caused
by
using
th
e crossover
outside the recommend
ed
value.
Adjusting
X-Over
and
Switching
the
Phases
This section describes how to adjust
X-Over. Before working on this,
refer to
"About
the Crossover
(X-Over)" (page 26).
Hint for adjusting the subwoofer
If the subwoofer
is
installed on the rear deck, setting a gentle
L.P.F slope
(for
example 6 dB/ oct.) makes the sound
localizati
on
more
to
the
rear.
This can
also
affect the acoustic
localizat
io
n of the front.
Hints for adjusting the high range
Depending on the speaker, inputting low frequency component
signals (about 2 kHz or
le
ss
)
with the
H.
PF
adjustment
could
re
sult
in
distortion.
If
so, set a steep
slope
(for example
30
dB
/oc
t)
When doing
so,
adjust
so
that the
mid
and
high range sounds do
not
separate.
Normally
use with the
L.
PF
off. If t
he
high range is too strong,
we
re
commend adjust
in
g for a gentle slope.
Hint for adjusting the low range
When a subwoofer is connected and you are using a speaker
with a
low
range of under
10
or
12
em
(3-15/16" or 4-3/4"),
setting the low range
H.P.F
to
"
OFF
"
can result
in
distortion
when
low
frequency components are input.
If
so,
set the
HP.F. slope
to a
val
ue
suited for
th
e speaker's
frequency
re
sponse.
1 Click
[X-Over] for [Shortcut] tab
in
the main menu.
The X-Over
Setup screen is di
sp
l
ayed
.
• When you click [Mobile Sound
Manager] on the Function switching
tab,
and
then
[X-
Over], the X-Over Setup
screen will also be
displa
yed
. Re
fer
to
"Operating
the Function
Switching Tab"
(page 7
).
2 Click either
£1!11
or
£11h