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01GB07PXAH800.fm
ALPINE PXA-H800_EN 68-13530Z65-A (B5)
From the Commander
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 48).
Note on adjusting the subwoofer
If the subwoofer is installed on the rear deck, setting a gentle
LPF slope (for example 6 dB/ oct.) makes the sound localization
more to the rear. This can also affect the acoustic localization of
the front.
Note on adjusting the high range
Depending on the speaker, inputting low frequency component
signals (about 2 kHz or less) with the HPF adjustment could
result in distortion. If distortion occurs, set a steep slope (for
example 30 dB/oct.).
Adjust so that the mid and high range sounds do not separate.
Normally use with the LPF turned off. If the high range is too
strong, we recommend adjusting for a gentle slope.
Note on adjusting the low range
When a subwoofer is connected and you are using a speaker
with a low range of under 10 or 12 cm (3-15/16” or 4-3/4”),
setting the low range HPF to “OFF” can result in distortion when
low frequency components are input.
If so, set the H.P.F. slope to a value suited for the speaker’s
frequency response.
1
Press [FUNC.].
2
Rotate the [Rotary encoder] to select “Sound Field
Adj.”, and then press the [Rotary encoder].
3
Rotate the [Rotary encoder] to select “X-Over,” and
then press the [Rotary encoder].
The X-OVER screen is displayed.
4
Press and hold [CHANNEL] for at least 2 seconds.
Rotate the [Rotary encoder] to select either “L+R” or
“L or R,” and press the [Rotary encoder].
L or R: Channels R and L can be set independently.
L+R: Both R and L channels are set at the same value
(The initial setting).
• When you switch from “L or R” to “L+R,” choose which adjustment
of the R and L channels to be applied.
1 Select either “L R” or “R L” by rotating the [Rotary
encoder], and press the [Rotary encoder].
L R: The adjustment of the L channel is to be applied to
both R and L channels.
R L: The adjustment of the R channel is to be applied to
both R and L channels.
5
Select the channel you want to adjust by pressing
[CHANNEL].
L+R selected: FRONT HIGH FRONT MID
FRONT LOW REAR CENTER
SUBWOOFER*
1
FRONT HIGH
L or R selected: FRONT L HIGH FRONT R HIGH
FRONT L MID FRONT R MID
FRONT L LOW FRONT R LOW
REAR L REAR R CENTER
SUBWOOFER*
2
FRONT L HIGH
*
1
If the Subwoofer output is set for Monaural, you can set both
SUBWOOFER 1 and 2.
*
2
If the Subwoofer output is set for Monaural, you can set
SUBWOOFER 1 and 2. If the Subwoofer output is set for Stereo, you
can set SUBWOOFER L and R.
• Channels to be set vary depending on the system set in “Setting the
Speaker System (System Select)” (page 37).
6
Rotate the [Rotary encoder] to select “HPF,” and
then press the [Rotary encoder].
7
Select the cut-off frequency (fc) by rotating the
[Rotary encoder], and press the [Rotary encoder].
• The frequency that can be adjusted may vary depending on the
channel (speaker). Refer to “About the Crossover (X-Over)”
(page 48).
8
Adjust the slope by rotating the [Rotary encoder],
and press the [Rotary encoder].
Slope: 0(OFF)/-6/-12/-18/-24/-30/-36 dB/oct*
3
*
3
Neither LPF of Subwoofer nor HPF of Front High can be set at 0
(OFF).
9
Adjust the gain by rotating the [Rotary encoder], and
press the [Rotary encoder].
Gain: -24 to 0 dB (in 0.5 dB steps)
10
Switch the phase by rotating the [Rotary encoder],
and press the [Rotary encoder].
Phase: 0°/180°
This will take you back to the Step 6 screen.
11
Next, select “LPF” in Step 6, and repeat Steps 7
through 10 to adjust HPF.
01GB00PXAH800.book Page 49 Tuesday, February 8, 2011 9:04 PM