About The Crossover - Alpine DVA-9965 Owner's Manual

About the Crossover

Crossover:
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.
2 way mode
Cut-off frequency
(1/3 octave steps)
HPF LPF
Low range 20 Hz -
----
speaker 200 Hz
Rear high
20 Hz -
range ----
200 Hz
speaker
Front high
20 Hz -
range ----
200 Hz
speaker
Low range
(Different from actual display)
3 way mode
Cut-off frequency
(1/3 octave steps)
HPF LPF
Low range 20 Hz -
----
speaker 200 Hz
Mid range 20 Hz - 1 kHz -
speaker 200 Hz 20 kHz
1 kHz -
High range
----
20 kHz
speaker
* 1
Only when selecting USER'S in
"
the High Range Speaker (page 37).
Slope
Level
HPF LPF
FLAT, 6,
0 to
----
12, 18,
−12 dB
24 dB/oct
FLAT, 6,
0 to
----
12, 18,
−12 dB
24 dB/oct
FLAT, 6,
0 to
----
12, 18,
−12 dB
24 dB/oct
High range
Slope
Level
HPF LPF
FLAT, 6,
0 to
----
12, 18,
− 12 dB
24 dB/oct
FLAT, 6, FLAT, 6,
0 to
12, 18, 12, 18,
−12 dB
24 dB/oct 24 dB/oct
FLAT* 1
0 to
----
6, 12, 18,
−12 dB
24 dB/oct
"
Setting the Response Slope for
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
• 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.
• You cannot adjust the crossover frequency higher than the HPF or
lower than the LPF.
• Use the recommended crossover frequencies of the speakers being
used for setting the crossover. Adjusting to a frequency outside that
recommended range might cause damage to the speakers.
For the recommended crossover frequencies of Alpine speakers,
refer to the respective Owner's Manual.
Alpine is not responsible for damage or malfunction of speakers
caused by improper crossover settings.
High range
Slope FLAT
Slope adjusting
(Different from actual display)
23
-EN