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20-EN
BASS ENGINE SQ Function
With the BASS ENGINE SQ function on this unit, several parameters
affecting Bass performance are adjusted simultaneously. The Bass Level
adjustment varies these parameters uniformly for optimum Bass effect
at different levels.
Press and hold BASS for at least 2 seconds to switch the
sound mode.
BASS ENGINE SQ MANUAL SET (Initial setting)
BASS ENGINE SQ:
Adjust the relevant Bass parameters uniformly and automatically.
MANUAL SET:
Adjust each audio effect setting separately and manually.
Notes
This operation can also be performed by selecting BASS ENGIN in
Audio Setup mode. Refer to “Setting BASS ENGINE SQ ON/OFF” on
page 17.
You can access the Sound menu mode directly by pressing BASS when
BASS ENGIN is set to OFF.
You can set this item via the Alpine TuneIt App on a Smartphone.
Refer to “Adjusting the sound via the Smartphone” on page 25.
If you switch the 2WAY/3WAY system (page 23) to 3WAY mode, you
cannot adjust this item.
With BASS ENGINE SQ ON, adjusting the Bass Level uniformly effects
various sound parameters for optimum Bass effect.
1
Press BASS to display the BASS ENGINE SQ Level
adjustment screen.
The unit’s back lighting changes during this period.
2
Turn the Rotary encoder to select the desired level
(+0-+6).
The initial level is +3.
Notes
Adjustable only when DEFEAT is OFF.
Adjustable only when 2WAY/3WAY system mode is set to 2WAY.
The Bass parameters affected contain EQ PRESETS, 9BAND EQ,
SUBWOOFER (when set this item via Alpine TuneIt App), X-OVER,
SUBW SYS and MX SETTING. These items are set automatically in
BASS ENGINE SQ mode and cannot be adjusted separately.
From Level 0 to Level 6, the effect of BASS ENGINE SQ increases level
by level.
If no operation is performed for 5 seconds, the unit automatically
returns to normal mode.
About Time Correction
The distance between the listener and the speakers in a car vary widely
due to the complex speaker placement. This difference in the distances
from the speakers to the listener creates a shift in the sounds image and
frequency characteristics. This is caused by the time delay between the
sound reaching the listener’s right versus the left ear.
To correct this, this unit is able to delay the audio signal to the speakers
closest to the listener. This effectively creates a perception of increased
distance for those speakers. The listener can be placed at an equal
distance between the left and right speakers for optimum staging.
The adjustment will be made for each speaker in 3.4cm steps.
Adjust the time correction level of the front left speaker to a high value
and the rear right to zero or a low value.
The sound is not balanced because the distance between the listening
position and the various speakers is different.
The difference in distance between the front left speaker and the rear
right speaker is 1.75 m (68-7/8").
Here we calculate the time correction value for the front left speaker in
the diagram on the above.
Conditions:
Farthest Speaker – listening position: 2.25 m (88-9/16")
Front left speaker – listening position: 0.5 m (19-11/16")
Calculation: L = 2.25 m – 0.5 m = 1.75 m (68-7/8")
Time correction = 1.75 ÷ 343
*
× 1,000 = 5.1 (ms)
* Speed of sound: 343 m/s (765 mph) at 20°C
In other words, giving the front left speaker a time correction value of
5.1 ms makes it seem as if its distance from the listener is the same as the
distance to the farthest speaker.
Time correction eliminates the differences in the time required for the
sound to reach the listening position.
The time of the front left speaker is corrected by 5.1 ms so that its sound
reaches the listening position at the same time as the sound of other
speakers.
Adjust the time correction level of each speaker to almost the same level.
1
Sit in the listening position (driver’s seat, etc.) and
measure the distance (in metres) between your head and
the various speakers.
Switching BASS ENGINE SQ mode
Adjusting BASS ENGINE SQ Level
About Setup when the external power amplifier is connected.
In order to optimize the BASS ENGINE SQ, we recommend the
following power amplifier setup.
After setting up, you can adjust the BASS ENGINE SQ Level
according to the music.
1 Set gain of the power amplifier to “MIN”.
2 Set the Crossover Mode Sector switch to “OFF”.
3 Set the BASS ENGINE SQ of this unit to “ON”, and the BASS
ENGINE SQ Level to “+3”.
4 Play a song of the genre you frequently listen to, and
adjust gain of the power amplifier.
Example 1. Listening Position: Front Left
Seat
Example 2. Listening Position: All Seats
5.1ms
2.25m
0.5m
20


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