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Alpine mrd m 300 Seite 24

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STEP 5. (5) BASS COMP. (Bass Compensation)
Digital Bass Compensation utilizes Alpine’s exclusive
MediaXpander™ processing technology to enhance bass definition
and output. This is an especially useful feature in restoring bass
quality lost with compressed media such as MP3’s. Selection is simply
on/off except for the MRD-M1000, which has three effect levels
available for more precise tuning or personal taste.
• You should be in mode "5" (BASS COMP.) now
from the previous step.
• Push "ENT" and push "ENT" again to select "5-1" (ON/OFF).
• Toggle to "ON". Push "ENT".
• Push "ENT" to enter "5-2" (BASS COMPENSATION LEVEL).
• Toggle to select "COMP.1", "COMP.2" or "COMP.3".
• Press "MODE" to advance to step 6 or "DISP" to exit.
SETTING BASS COMPENSATION
Toggle
ENT
ENT
Toggle
ENT
START HERE
DISP
OR
Lower Frequency (LP) Higher Frequency
3
Level
Variable Width
Adjustment
NOTE: When adjusting the selected frequency's
width setting, "0.5 or 1" will represent a "WIDE"
band width and "5" will represent a "NARROW"
bandwidth.
0dB
20 30 40 60 100K 1000K10Hz
50Hz Sample Adjustment
dB
Hz
MODE
Toggle
Toggle
OR
For MRD-M300
For MRD-M500
ENTENT
ENT ENT
Toggle
ENT
ENT ENT
ENT
ENT
• You should be in mode "4" (PARAMETRIC EQ) now
from the previous step.
• Push "ENT" to enter the adjustment menu.
• Push "ENT" to enter "4-1" (ON/OFF).
• Toggle to "ON" and push "ENT"
• Push "ENT" to enter "4-2". (FREQUENCY)
• Toggle to desired freq. and push "ENT".
• Push "ENT" to enter "4-3". (WIDTH)
• Toggle to attain the desired width
(note: a lower Q Value= Wider,
a higher Q value = more narrow)
• Push "ENT" to enter "4-4". (LEVEL
• Toggle to desired level (boost or cut)
• Press "MODE" to advance to step 5 or "DISP" to exit.
SETTING THE PARAMETRIC EQ
START HERE
DISP
OR
STEP 4. (4) PARAMETRIC EQ (Frequency, Width (Q), and Level)
Using the Parametric EQ is a good way to fine tune your
subwoofer or adjust for personal taste. Unlike traditional bass
boost or graphic EQ's, both the center frequency and width of
the EQ band is user selectable, allowing it to be custom tailored
for the desired effect. As you can see in example [3], with the
subsonic and low pass filters engaged, you can enhance your
sound by focusing on a high energy bass response in the
vehicle. When set to its widest setting, this can also function as
an overall gain adjustment.
• You should be in mode "3" (SUBSONIC) now from the
previous step.
• Push "ENT" to enter "3". Push "ENT" to enter "3-1" (ON/OFF).
• Toggle to "ON" setting and push "ENT".
• Push "ENT" to enter "3-2" (FREQUENCY).
• Toggle to desired frequency.
• Typical settings include 25Hz for sealed box, and 30Hz
or higher for ported box. (depending on tuning freq.)
• Press "MODE" to advance to step 4 below.
ADJUSTING THE SUBSONIC FILTER
Toggle Toggle
MODE
OR
ENTENT
Hz
ENT ENT
Hz
For Sealed
For Ported
START HERE
STEP 3. (3) SUBSONIC (Subsonic Filter)
Subsonic filters are commonly used to minimize over excursion at
very low frequencies, or to optimize output power by only amplifying
frequencies that can be effectively reproduced. This feature is
essentially a high pass filter with a very low frequency range, and is
selectable from 15Hz to 50Hz in 5Hz increments. Please make sure
that the frequency selected is significantly lower than that of the low
pass filter, unless you have a very specific performance goal in mind.
To the right is example [2], which illustrates the effect of a subsonic
Lower Frequency (LPF) Higher Frequency
2
0dB
20 30 40 60 100K 1000K10Hz
30Hz Sample Adjustment
To find out more, visit www.alpinetechcenter.com
Copyright 2002 © Alpine Electronics of America, Inc. REV. A-101502
ToggleToggle
dB
MODE MODE
ENT
ENT
ENT
ENT
• Push "MODE" to access "1" (INPUT).
• Push "ENT" enter "1". Push "ENT" to enter "1-1" (SELECT).
• Toggle to select "1ch" or "2ch". Push "ENT".
• Push "ENT" to enter "1-2" (INPUT LEVEL).
• Toggle to the input level that will properly match the
source unit output to the amplifier input. Severely clipping the
input will result in high distortion, so use the clipping indicator
as a guide to set this level.
• Push "ENT" to enter "1-3" (GAIN FACTOR). Push "ENT".
• Toggle to select "0", "6" or "9".
• Press "MODE" to advance to step 2 below.
SETTING THE INPUT
Toggle
dB
ENT
ENT
START HERE
T
O
S
T
E
P
2
T
O
S
T
E
P
5
T
O
E
X
I
T
T
O
S
T
E
P
6
T
O
E
X
I
T
T
O
S
T
E
P
4
T
O
S
T
E
P
3
Toggle Toggle
MODE
ENTENT
Hz
ENT ENT
• You should be in mode "2" (LPF) now from the
previous step.
• Push "ENT" to enter "2".
• Push "ENT" to enter "2-1" (ON/OFF).
• Toggle to "ON". Push "ENT".
• Push "ENT" to enter "2-2" (FREQUENCY).
• Toggle to desired frequency.
• Push "MODE" to advance to step 3 below.
ADJUSTING THE CROSSOVER
START HERE
STEP 1. (1) INPUT
Proper configuration of the input setup menu is critical for source signal matching with minimal distortion, while also
optimizing the output level relative to other amplifiers in the system. INPUT SELECT (mode 1-1) should be set
according to the physical input signal connection being made, either “2ch” for stereo or “1ch” for single/mono
channel. INPUT LEVEL (mode 1-2) allows the A/D converter’s input to be optimized for the best possible signal
clarity and volume range. Setting this overly sensitive or severely clipping the input can result in very high distortion,
so it is best to use the clipping indicator as general guide. GAIN FACTOR (mode 1-3) is provided for special cases
where additional gain is still required after all other adjustments have been made. While this signal shaping
algorithm allows a higher average output level to be reached at lower source volumes, signal alteration may not be
desirable in some applications. Therefore, it is recommended to return to this adjustment again later after continuing
through the remaining setup steps.
STEP 2. (2) LPF (Low Pass filter)
Eliminating unwanted higher frequencies is essential for optimizing
subwoofer performance and integration with the rest of the system.
Selecting the appropriate cut off frequency of the low pass filter will
depend upon the application, so a wide frequency range (30Hz-
200Hz) is provided to choose from. Please note however, that if the
selected frequency is very close to or overlaps with the subsonic filter,
it will result in little or no output. Also, if an external crossover is
used, the internal filter can be turned off.
Lower Frequency (LP) Higher Frequency
1
0dB
20 30 40 60
80
100K 1000K10Hz
80Hz Sample Adjustment
MODE SELECT FUNCTION SELECT
Tables related to MODE and FUNCTION
Mode
MODE FUNCTION
No.
1
2
3
4
5
6
7
8
9
0
No.
1-1
1-2
1-3
2-1
2-2
3-1
3-2
4-1
4-2
4-3
4-4
5-1
5-2
6-1
6-2
7-1
8-1
8-2
9-1
0-1
0-2
Contents
INPUT MODE
LPF
SUBSONIC
PARAMETRIC EQ
BASS COMP.
TIME CORR.
PHASE
AMP SET
OUTPUT DISABLE
MEMORY
Contents
SELECT
LEVEL
GAIN FACTOR
ON/OFF
FREQUENCY
ON/OFF
FREQUENCY
ON/OFF
FREQUENCY
WIDTH
LEVEL
ON/OFF
MODE *Only MRD-M1000.
ON/OFF
DELAY TIME
0/180
ID No.
TURN ON DELAY
ON/OFF
WRITE
READ
1
2
1–1 1–2 1–3
MODE ENT
2–1 2–2
3
3–1 3–2
4
4–1 4–2 4–3 4–4
5
5–1
6
5–2
5–2
7
7–1
8
8–1 8–2
9
9–1
0
0–1 0–2
1
(DOWN) (UP)
BUTTON
FLOW
is for only MRD-M1000.
*
6–1 6–2
… 24

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