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01GB07PXAH800.fm
ALPINE PXA-H800_EN 68-13530Z65-A (B5)
From the Commander
12
To adjust another channel, repeat Steps 5 through
11.
• You can mute the channel you are adjusting.
1 Press [MUTE] while in the adjustment mode to mute the
channel.
2 To cancel muting, press [MUTE] again.
13
When the setting is complete, press and hold [ ]
for at least 2 seconds.
• If [ ] is pressed during setting, the unit returns to the previous
item.
• When Tweeter is selected for FRONT HIGH to protect the speaker,
there is no filter off (Slope OFF) setting for HPF. There is no filter off
(Slope OFF) setting for Subwoofer LPF, either.
• When the speaker is in Off mode, X-Over does not affect the speaker.
Refer to “Setting the Speaker System (System Select)” (page 37)/
“Setting the Speakers (Speaker Setup)” (page 38).
• Check the playback frequencies of the connected speakers before
adjusting.
• 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 36).
Adjusting the Time Correction (TCR)
Because of the particular conditions inside the vehicle, there are major
differences in the distances between the different speakers and the
listening position. The proper time correction can be obtained using the
automatic time correction function (“Auto TCR”), but it is also possible
to calculate the optimum correction values and eliminate the time error
at the listening position yourself using this function.
e Calculation of time correction
1
Sit in the listening position (the driver’s seat, for
example) and measure the distance (in meters)
between your head and the various speakers.
2
Calculate the difference in distance between the
farthest speaker and the other speakers.
L = (distance of farthest speaker) – (distance of other
speakers)
3
Divide the distances calculated for the different
speakers by the speed of sound (343 m/s
temperature 20°C).
This value is the time correction value for the different
speakers.
Concrete examples
1 Calculating the time correction value for the front left
speaker on the diagram below.
Conditions:
Distance between farthest speaker and listening position: 2.25
m (88-3/4")
Distance between front left speaker and listening position: 0.5 m
(20")
Calculation: L = 2.25 m (88-3/4") – 0.5 m (20") = 1.75 m (68-3/4")
Compensation time = 1.75 ÷ 343 x 1000 = 5.1 (ms)
In other words, setting the time correction value for the front left
speaker to 5.1 (ms) sets a virtual distance matching the
distance to the farthest speaker.
e Entering the time correction
4
Press [FUNC.].
5
Rotate the [Rotary encoder] to select “Sound Field
Adj.,” and then press the [Rotary encoder].
6
Rotate the [Rotary encoder] to select “TCR”, and
then press the [Rotary encoder].
The TCR screen is displayed.
7
Select [ON] for “TCR” by rotating the [Rotary
encoder], and press the [Rotary encoder].
• When “OFF” is selected, the TCR function becomes disabled.
8
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).
2.25m
0.5m
5.1ms
The sound is uneven because
the distance between the
listening position and the
different speakers is different.
The difference in the distance
between the front left and rear
right speakers is 1.75 meters
(68-3/4").
Time correction eliminates the
difference between the time
required for the sound from the
different speakers to reach the
listening position.
Setting the time correction of the
front left speaker to 5.1 ms
makes it possible to coordinate
the distance from the listening
position to the speaker.
01GB00PXAH800.book Page 50 Tuesday, February 8, 2011 9:04 PM