Read this manual carefully before using the system
components. They contain instructions on how to
use this product in a safe and effective manner.
Alpine cannot be responsible for problems
resulting from failure to observe the instructions in
this manual.
This symbol means important instructions.
WARNING
DO NOT OPERATE ANY FUNCTION THAT TAKES YOUR
ATTENTION AWAY FROM SAFELY DRIVING YOUR
VEHICLE.
Any function that requires your prolonged attention
should only be performed after coming to a complete
stop. Always stop the vehicle in a safe location before
performing these functions. Failure to do so may result in
an accident.
KEEP THE VOLUME AT A LEVEL WHERE YOU CAN STILL
HEAR OUTSIDE NOISES WHILE DRIVING.
Excessive volume levels that obscure sounds such as
emergency vehicle sirens or road warning signals (train
crossings, etc.) can be dangerous and may result in an
accident. LISTENING AT LOUD VOLUME LEVELS IN A CAR
MAY ALSO CAUSE HEARING DAMAGE.
Failure to heed them can result in serious
injury or death.
USE THIS PRODUCT FOR MOBILE 12V APPLICATIONS.
Use for other than its designed application may result in
fire, electric shock or other injury.
USE THE CORRECT AMPERE RATING WHEN REPLACING
FUSES.
Failure to do so may result in fire or electric shock.
DO NOT BLOCK VENTS OR RADIATOR PANELS.
Doing so may cause heat to build up inside and may result
in fire.
MAKE THE CORRECT CONNECTIONS.
Failure to make the proper connections may result in fire or
product damage.
USE ONLY IN CARS WITH A 12 VOLT NEGATIVE GROUND.
(Check with your dealer if you are not sure.) Failure to do so
may result in fire, etc.
BEFORE WIRING, DISCONNECT THE CABLE FROM THE
NEGATIVE BATTERY TERMINAL.
Failure to do so may result in electric shock or injury due to
electrical shorts.
DO NOT ALLOW CABLES TO BECOME ENTANGLED IN
SURROUNDING OBJECTS.
Arrange wiring and cables in compliance with the manual
to prevent obstructions when driving. Cables or wiring
that obstruct or hang up on places such as the steering
wheel, gear lever, brake pedals, etc. can be extremely
hazardous.
DO NOT SPLICE INTO ELECTRICAL CABLES.
Never cut away cable insulation to supply power to other
equipment. Doing so will exceed the current carrying
capacity of the wire and result in fire or electric shock.
DO NOT DAMAGE PIPE OR WIRING WHEN DRILLING
HOLES.
When drilling holes in the chassis for installation, take
precautions so as not to contact, damage or obstruct
pipes, fuel lines, tanks or electrical wiring. Failure to take
such precautions may result in fire.
EN
FR
ES
DO NOT DISASSEMBLE OR ALTER.
Doing so may result in an accident, fire or electric shock.
1-EN
ALPINE PDR-V75 68-25285Z56-A (EN/FR/ES)
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DO NOT USE BOLTS OR NUTS IN THE BRAKE OR
STEERING SYSTEMS TO MAKE GROUND CONNECTIONS.
Bolts or nuts used for the brake or steering systems (or any
other safety-related system), or tanks should NEVER be
used for installations or ground connections. Using such
parts could disable control of the vehicle and cause fire etc.
KEEP SMALL OBJECTS SUCH AS BATTERIES OUT OF THE
REACH OF CHILDREN.
Swallowing them may result in serious injury. If swallowed,
consult a physician immediately.
This symbol means important instructions.
CAUTION
HALT USE IMMEDIATELY IF A PROBLEM APPEARS.
Failure to do so may cause personal injury or damage to
the product. Return it to your authorized Alpine dealer or
the nearest Alpine Service Center for repairing.
HAVE THE WIRING AND INSTALLATION DONE BY
EXPERTS.
The wiring and installation of this unit requires special
technical skill and experience. To ensure safety, always
contact the dealer where you purchased this product to
have the work done.
USE SPECIFIED ACCESSORY PARTS AND INSTALL THEM
SECURELY.
Be sure to use only the specified accessory parts. Use of
other than designated parts may damage this unit
internally or may not securely install the unit in place. This
may cause parts to become loose resulting in hazards or
product failure.
Failure to heed them can result in injury or
property damages.
SERVICE CARE
IMPORTANT NOTICE
This Amplifier has been type tested and found to
comply with the limits for a Class B computing
device in accordance with the specifications in
Subpart J of Part 15 of FCC Rules. This equipment
generates and uses radio frequency energy, and it
must be installed and used properly in accordance
with the manufacturer’s instructions.
SERIAL NUMBER:
INSTALLATION DATE:
INSTALLATION TECHNICIAN:
PLACE OF PURCHASE:
IMPORTANT
Please record the serial number of your unit in
the space provided here and keep it as a
permanent record. The serial number plate is
located on the rear of the unit.
For European Customers
Should you have any questions about warranty,
please consult your store of purchase.
For Customers in other Countries
IMPORTANT NOTICE
Customers who purchase the product with which
this notice is packaged, and who make this
purchase in countries other than the United States
of America and Canada, please contact your dealer
for information regarding warranty coverage.
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ARRANGE THE WIRING SO IT IS NOT CRIMPED OR
PINCHED BY A SHARP METAL EDGE.
Route the cables and wiring away from moving parts (like
the seat rails) or sharp or pointed edges. This will prevent
crimping and damage to the wiring. If wiring passes
through a hole in metal, use a rubber grommet to prevent
the wire’s insulation from being cut by the metal edge of
the hole.
DO NOT INSTALL IN LOCATIONS WITH HIGH MOISTURE
OR DUST.
Avoid installing the unit in locations with high incidence of
moisture or dust. Moisture or dust that penetrates into this
unit may result in product failure.
• Hexagon Wrench (Large/Small) ..........................1 SET
• Logo Plate ...........................................................................1
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INSTALLATION
Due to the high power output of the PDR-V75
considerable heat is produced when the amplifier
is in operation. For this reason, the amplifier should
be mounted in a location which will allow for free
circulation of air, such as inside the trunk. For
alternate installation locations, please contact your
authorized Alpine dealer.
1. Remove the hexagon screws using the supplied
Hexagon Wrench (small). (Fig. 1)
6. Position the PDR-V75 over the screw holes, and
secure with four self-tapping screws. (Fig. 3)
Self-Tapping Screws (M4 × 20)
Holes
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.............4
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Hexagon Screws
Fig. 1
2. Slide the Top Cover, and lift it to remove. (Fig. 2)
• Be sure not to damage the indicator area.
Top Cover
Fig. 2
3. Using the amplifier as a template, mark the four
screw locations.
4. Make sure there are no objects behind the
surface that may become damaged during
drilling.
5. Drill the screw holes.
Ground Lead
Chassis
NOTE:
• To securely connect the ground lead, use an
already installed screw on a metal part of the
vehicle (marked ( )) or a clean, bare metal spot
on the vehicle’s chassis. Be sure this is a good
ground by checking continuity to the battery (–)
terminal. Connect all equipment to the same
ground point while keeping wire length as short
as possible. These procedures will help eliminate
noise.
Holes
Fig. 3
3-EN
ALPINE PDR-V75 68-25285Z56-A (EN/FR/ES)
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ATTACHING THE TOP
COVER AND LOGO PLATE
1. Attach the Top Cover after connections and
confirmation of correct operation.
2. Peel the backing paper from the Logo Plate,
then attach it to this unit in your desired
direction. (Fig. 4)
Logo Plate
Backing Paper
Fig. 4
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4-EN
ALPINE PDR-V75 68-25285Z56-A (EN/FR/ES)
CONNECTIONS
EN
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Be sure to add an in-line fuse with the battery lead as close as possible to the battery’s positive (+) terminal.
Before making connections, be sure to turn the
power off to all audio components. Connect the
battery lead from the amp directly to the positive
(+) terminal of the vehicle’s battery with
appropriate in-line vehicle’s fuse (see Battery Lead
section). Do not connect this lead to the vehicle’s
fuse block.
To prevent external noise from entering the
audio system
• Locate the unit and route the leads at least 10 cm
(4”) away from the vehicle’s 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 any paint or grease if necessary) of
the vehicle’s chassis.
• If you add an optional noise suppressor, connect
it as far away from the unit as possible. Your
Alpine dealer carries various noise suppressors,
contact them for further information.
• Your Alpine dealer knows best about noise
prevention measures so consult your dealer for
further information.
Fig. 5
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Speaker Output Terminals
• The speaker output terminals of this unit are
insert terminal.
Be sure to observe correct speaker output
connections and polarity in relation to the other
speakers in the system. Connect the positive
output to the positive speaker terminal and the
negative to negative.
About Subwoofer Input/Output Terminals
• The input is stereo but the output is monaural.
• Reversing subwoofer polarity may be desirable
in some installations for optimum bass
performance.
About Bridged Connections
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.
Use a Y-adapter (sold separately) for the input
when bridging the outputs. (Refer to the
“BRIDGED CONNECTIONS” on page 13.)
NOTE:
• Do not connect the speaker (–) terminal to the
vehicle’s chassis.
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.
Fuse
PDR-V75 ...............................................................40 A x 2
USE THE CORRECT AMPERE RATING WHEN
REPLACING FUSES.
Failure to do so may result in fire or electric
shock.
Power Supply Terminal
Remote Bass Control (Option)
Connect the Remote Bass Control Unit (sold
separately) to adjust the output level remotely.
This is not to replace appropriate gain level
setting between the amplifier and head unit.
Battery Lead (Sold Separately)
Be sure to add an in-line fuse with the battery
lead 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. See
below for appropriate fuse value and minimum
wire gauge requirement:
PDR-V75 ..................... 80 amp fuse, 4 AWG/21 mm
Ground Lead (Sold Separately)
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 while keeping
wire length as short as possible.
Minimum required wire gauge for this
connection is as follows:
PDR-V75 ................................................4 AWG/21 mm
Remote Turn-On Lead (Sold Separately)
Connect this lead to the remote turn-on
(positive trigger, (+) 12V only) lead of your head
unit. If a remote turn-on lead is not available, see
“CONNECTION CHECK LIST” section on
page 8 for alternative method.
NOTE:
• When connecting the speaker output leads of
the head unit to this unit with an RCA
extension cable (sold separately), etc., you do
not need to connect the remote turn-on lead,
owing to the “REMOTE SENSING” function of
this unit. However, the “REMOTE SENSING”
function may not work depending on the
signal source connected. In such a case,
connect the remote turn-on lead to an
incoming power supply cord (accessory
power) in the ACC position.
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2. Remove the insulation from the ends of the wire
CAUTION
About Power supply wires
If the length of the power and ground cables
leads by about 7 – 10 mm (9/32” – 13/32”).
(Fig. 7)
Lead end side of the product
exceed 1 m, or if you connect more than one
amplifier, a distribution block should be used. See
2
below for wire gauge recommendations for
distribution block connection to battery and
ground (depends upon wire length necessary):
2 AWG (33 mm
2
) or 1/0 AWG (53 mm2)
PDR-V75
BATTERYGROUND
7 – 10 mm
(9/32” – 13/32”)
EN
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Fig. 7
1 m
(Max.)
2
4 AWG
(21 mm
2
)
NOTES:
• If length of the exposed wire is too short, a poor
connection may occur causing operation failure
or sound interruption.
• On the other hand, if the length is too long, an
electrical short-circuit may occur.
3. Tighten the set screw with the hexagon wrench
Distribution
block
To vehicle’s
battery
2 AWG (33 mm
1/0 AWG (53 mm
To vehicle’s
chassis
2
) or
2
)
(included) to secure the lead. (Fig. 8)
Before making this connection, use insulated
shrink tubing to cover any exposed wire
extending beyond the terminal.
Hexagon Screw
Wire Terminal
ES
Fig. 6
Connect all equipment to the same ground point while
keeping wire length as short as possible.
Ensure that you install a correctly-rated in-line fuse
on the power cable near the battery positive post.
Cautions on wire lead connections
When using third-party wire cables (power supply
wire), use the supplied screws to simplify the
connection. Refer to the description below for the
proper procedure. If you are in doubt about how to
make this connection, consult your dealer.
1. Check the wire size.
• Required Wire Size
– Battery Lead/Ground Lead ....4 AWG (21 mm2)
– Remote Turn-On Lead .............12 AWG (3 mm2)
– Speaker Output Lead:
SUB W. ............................................. 8 AWG (8 mm2)
• For safety reasons, connect the battery leads last.
• To prevent disconnection of the leads or
dropping of the unit, do not use the cabling to
carry the unit.
Wire
Fig. 8
7-EN
ALPINE PDR-V75 68-25285Z56-A (EN/FR/ES)
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CONNECTION CHECK LIST
PDR-V75
SWI
Please check your head unit for the conditions
listed below: (Fig. 9)
Remote Turn-On Lead
a. The head unit does not have a remote turn-on
or power antenna lead.
b. The head unit’s power antenna lead is activated
only when the radio is on (turns off in the tape
or CD Mode).
c. The head unit’s power antenna lead is logic level
output (+) 5V, negative trigger (grounding type),
or cannot sustain (+) 12V when connected to
other equipment in addition to the vehicle’s
power antenna.
If any of the above conditions exist, the remote
turn-on lead of your PDR-V75 must be
connected to a switched power source (ignition)
in the vehicle. Be sure to use a 3A fuse as close
as possible to this ignition tap. Using this
connection method, the PDR-V75 will turn on
and stay on as long as the ignition switch is on.
If this is objectionable, a SPST (Single Pole,
Single Throw) switch, in addition to the 3A fuse
mentioned above, may be installed in-line on
the PDR-V75 turn-on lead. This switch will then
be used to turn on (and off) the PDR-V75.
Therefore, the switch should be mounted so that
is accessible by the driver. Make sure the switch
is turned off when the vehicle is not running.
Otherwise, the amplifier will remain on and
drain the battery.
Blue/White
Power Antenna
Remote Turn-On Lead
To other Alpine component’s Remote Turn-On
Leads
SPST Switch (optional)
Fuse (3A)
As close as possible to the vehicle’s ignition tap
Ignition Source
Fig. 9
NOTE:
• Before
the po
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8-EN
ALPINE PDR-V75 68-25285Z56-A (EN/FR/ES)
Fig. 9
SWITCH SETTINGS
NOTE:
• Before switching each Selector Switch, turn off
the power and insert a small screwdriver, etc.,
perpendicularly to the Switch.
Crossover Frequency Adjustment Knob
Use this control to adjust the crossover
frequency between 50 and 400 Hz.
Input Gain Adjustment Control
Set the PDR-V75 input gain to the minimum
position. Using a dynamic CD as a source,
increase the head unit volume until the output
distorts. Then, reduce the volume 1 step (or until
the output is no longer distorted). Now, increase
the amplifier gain until the sound from the
speakers becomes distorted. Reduce the gain
slightly so the sound is no longer distorted to
achieve the optimum gain setting.
Input Channel Selector Switch
a) This switch setting is for selecting
either 2-channel or 4-channel input
mode. When set to “1/2”, signal will
be copied from CH-1/2 and sent to
CH-3/4, eliminating the need for
Y-adapters.
b) Setting this switch to “3/4” will keep
both inputs, CH-1/2 and CH-3/4
independent.
A 4-channel source is required for
this mode.
EN
FR
ES
Crossover Mode Selector Switch
a) Set to the “OFF” position when the
amplifier will be used for driving
full range speakers or when using
an external electronic crossover.
The full frequency bandwidth will
be output to the speakers with no
high or low frequency attenuation.
b) Set to the “ON” 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.
NOTE:
• In this case the maximum Bass EQ
boost level is reduced.
Fig. 10
Subsonic Filter
The subsonic filter for cutting ultra low
frequencies from the input signal before being
amplified.
This is desirable for several reasons:
– To protect speakers too small or not capable
of reproducing ultra low frequencies.
– To minimize power wasted from reproducing
inaudible sound.
– To protect subwoofers in vented enclosures
from over excursion below the tuning
frequency.
9-EN
ALPINE PDR-V75 68-25285Z56-A (EN/FR/ES)
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Bass EQ Adjustment Knob
Add a 50 Hz bass boost up to +12 dB to tune
your bass response.
Input Channel Selector Switch (SUB W.)
a) When this switch is placed in the
“1+2+3+4” position, all the signals
are mixed and come out from the
SUB W. This setting provides signal
to the subwoofer channel when
only 4 channel input is available.
b) Setting this switch to “SUB W.” will
send the signal at the inputs of SUB
W. (L/R) to SUB W. of the PDR-V75.
About Power Indicator
Power Indicator
Fig. 11
Lights up when power is on.
Is off when power is off.
Indication colorStatusSolution
BlueAmplifier circuit is normal.
Red
(blinking)
RedAmplifier circuit is abnormal.
Operating temperature is
high.
An electrical short has
occurred, or supply current is
too high.
Operating temperature is too
high.
Power supply voltage is too
high.
Decrease the vehicle’s interior temperature to a
normal level.
The indicator color changes to blue.
Turn off the power supply and eliminate the cause.
Then turn on the unit and verify that the indicator
color has changed to blue.
If it remains red, turn off the unit and consult your
dealer.
Decrease the vehicle’s interior temperature to a
normal level.
The indicator color changes to blue.
Use the correct power supply voltage.
The indicator color changes to blue.
SYS
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SYSTEM DIAGRAMS
Subwoofer
Front Speakers
Rear Speakers
Head Unit, etc.
Front Output