CONNECTIONS (Fig. 2 – Fig. 6)
Before making connections, be sure to turn the power off to
all audio components. Connect the yellow battery lead from
the amp directly to the positive (+) terminal of the vehicle's
battery. Do not connect this lead to the fuse block.
To prevent external noise from entering the audio
system.
•
Locate the unit and route the leads at least 10 cm away
from the car harness.
•
Keep the battery power leads as far away from other
leads as possible.
•
Connect the ground lead securely to a bare metal spot
(remove the coating if necessary) of the car chassis.
•
If you add an optional noise suppressor, connect it as
far away from the unit as possible. Your Alpine dealer
carries various Alpine noise suppressors, contact them
for further information.
•
Your Alpine dealer knows best about noise prevention
measures so consult your dealer for further information.
1
RCA Input Jacks
Connect these jacks to the line out leads on your head unit
using RCA extension cables (sold separately). Be sure to
observe correct channel connections; Left to Left and Right
to Right.
2
Speaker Output Terminals
The MRV-1505/MRV-1005/MRV-T505 has two sets of
speaker outputs. Be sure to observe correct speaker output
connections and phasing. In the stereo mode, connect the
right speaker outputs to the right speaker and the left to left.
Connect the positive output to the positive speaker terminal
and the negative to negative.
In the bridged mode, connect the left positive to the positive
terminal on the speaker and the right negative to the
negative terminal of the speaker. Do not use the speaker
(–) terminals as a common lead between the left and right
channels. Do not connect this lead to the vehicle's chassis.
NOTE:
Do not connect speaker leads together or to chassis
ground.
3
Battery Lead (Yellow)
Be sure to add a 80 amp fuse as close as possible to the
battery's positive (+) terminal. This fuse will protect your
vehicle's electrical system in case of a short circuit. If you
need to extend this lead, the wire gauge should be 8 AWG
or larger.
MRV-1505 ... 80 amp fuse
MRV-1005 ... 60 amp fuse
MRV-T505 ... 30 amp fuse
4
Remote Turn-On Lead (Blue/White)
Connect this lead to the remote turn-on or power antenna
(positive trigger, (+) 12V only) lead of your head unit.
5
Ground Lead (Black)
Connect this lead securely to a clean, bare metal spot on
the vehicle's chassis. Verify this point to be a true ground
by checking for continuity between that point and the
negative (–) terminal of the vehicle's battery. Ground all
your audio components to the same point on the chassis to
prevent ground loops.
6
Insulation Tube
MRV-1505/MRV-1005
In case of using the leads (speaker/power supply cord)
purchased at the market, use the hexagon screws and the
hexagon wrench (M2.5) included as the accessory to
make connection easier. The wire size should be within
AWG6 – AWG18.
MRV-1505/MRV-1005
1
2
3
4
5
6
INPUT
CH-1
(L)
CH-2
(R)
CH-2
CH-1
BATTERY
REMOTE
GND
POWER SUPPLY
+
+
–
–
BRIDGED
SPEAKER OUTPUT
+
–
(R)
(L)
80A
80A
FUSE
(MRV-1505)
SWITCH SETTINGS
7
High-pass Output Phase Switch
Sets the phase of this output to 0° (in phase) or 180°
(inverted) independently from the other output. Often, the
subwoofer and midrange (or midrange and tweeter) may
be acoustically out of phase with each other, meaning all
the sound will cancel completely or partially. Also, 2nd
order filters are naturally out-of-phase electrically. Always
try the phase switch to establish the best setting before
fine-tuning the crossover frequencies.
8
Input Mode Selector Switch
a) Set to the "ST" position (center) when
the two channels are used in stereo.
The CH-1 (or CH-2) input will output
at the Speaker Output Terminal CH-1
(or CH-2).
b) Set to the "1 (MONO)" position when
the two channels are used for one
channel of a stereo bridged system.
The CH-1 input is output from the
Speaker Output Terminals CH-1(+)
and CH-2 (–). The CH-2 input
accepts no signal. (Refer to Fig. 6.)
c) Set to the "1 + 2" position when the
two channels are used for a
subwoofer system which uses the
right channel and left channel signals
summed. The CH-1 and CH-2 inputs
are summed, then output from the
Speaker Output Terminals CH-1(+)
and CH-2 (–). (Refer to Fig. 5.)
9
Crossover Mode Selector Switch
a) Set to the "LP" position when the
amplifier is used to drive a subwoofer.
The frequencies above the crossover
point will be attenuated at 12 dB/
octave.
b) Set to the "HP" position when the
amplifier is used to drive a tweeter/
midrange system. The frequencies
below the crossover point will be
attenuated at 12 dB/octave.
c) Set to the "OFF" position when the
amplifier will be used for driving full-
range speakers. The full frequency
bandwidth will be output to the
speakers with no high or low
frequency attenuation.
-
Input Level Selector Switch
Set to the "4V" position when the head unit with 4V output
voltage is used.
When the head unit with non-4V output voltage is used at
the "4V" position, the volume will be decreased.
a
Parametric EQ Selector Switch
Set to the "ON" position when correcting the sound field
characteristics (bandwidth, center frequency, center
frequency level) in the car as you desire.
b
Low Impedance Selector Switch
Set to the "ON" position when a speaker with 1 ohm
impedance (TOTAL) is used.
If the indicator becomes amber, decrease the volume on
the head unit.
c
Crossover Frequency Adjustment Knob
Permits adjustment of the crossover frequency, by rotating
the knob to select any frequency between 50 to 200 Hz as
the crossover point.
d
Input Gain Adjustment Control
Set the MRV-1505/MRV-1005/MRV-T505 input gain knobs
to the minimum (4V) position. Using a loud cassette or
preferably a CD as a source, turn up the head unit volume
until it distorts. Then, reduce the volume 1 step. You can
then increase amplifier gain until the sound from the
speakers becomes distorted.
e
Quality-Factor (Bandwidth) Adjustment Knob
Used when the parametric EQ selector switch is set to the
"ON" position.
Allows independent continuous change of the boost or cut
center frequency bandwidth (Q-factor) for each band from
Q=10 (narrow bandwidth, steep slope) to Q=1 (wide
bandwidth, gentle slope).
f
Center Frequency Adjustment Control Knob
Used when the parametric EQ selector switch is set to the
"ON" position.
Selects the desired center frequency by changing the
frequency center value continuously.
Permits the adjustment of the center frequency between
50 to 200Hz.
g
Level Adjustment Knob
Used when the parametric EQ selector switch is set to the
"ON" position.
Permits the level increase/decrease adjustment of the
center frequency selected within the range of ±12 dB.
ST
1+2
1(MONO)
ST
1+2
1(MONO)
ST
1+2
1(MONO)
HP
LP
OFF
HP
LP
OFF
HP
LP
OFF
c
d
e
f
g
100
75
55
50
(Hz)
200
170
140
NOM
MIN
MAX
0.5V
CROSSOVER
GAIN
2.5
6.5
10.0
1.0
1.1
100
75
55
50
200
170
140
0
–6
–9
–12
+12
+9
+6
NARROW
WIDE
(Hz)
(dB)
Q-FACTOR
FREQUENCY
LEVEL
PARAMETRIC
EQUALIZER
★
V
12
DC STRAIGHT
MRV-T505
1
2
3
4
5
6
30A
INPUT
CH-1
(L)
CH-2
(R)
CH-2
(R)
(L)
CH-1
30A
BATTERY
REMOTE
GND
POWER SUPPLY
+
+
–
–
BRIDGED
SPEAKER OUTPUT
FUSE
+
–
(MRV-T505)
MRV-1505/MRV-1005/MRV-T505
2/1 CHANNEL
POWER AMPLIFIER
MRV-1505
0°
180°
PHASE
1(MONO)
OFF
HP
LP
NOM
4V
OFF
ON
1+2
ST
INPUT MODE
FILTER
INPUT LEVEL
LOW IMPEDANCE
OFF
ON
PARAME EQ
7
8
9
-
a
b
(MRV-1505)
Fig. 2
★
When adjusting the knobs
c
–
i
, remove two hexagon screws by using the hexagon wrench (M2)
included and remove the cover.
★
Lors du réglage des boutons
c
–
i
, déposer les deux vis à six pans à l'aide de la clé à vis hexagonale
(M2) fournie et déposer le couvercle.
★
Cuando ajuste los botones
c
–
i
, retire los dos tornillos hexagonales utilizando la llave hexagonal (M2)
proporcionada y quite la cubierta.
-10
0
+10
(dB)
(Hz)
Q=10
Q=1
Indicator
Indicateur
Indicador
–10
0
+10
(dB)
(Hz)
20
50
200
1K
–10
0
+10
(Hz)
(dB)