FOR CAR USE ONLY/POUR APPLICATION AUTOMOBILE/PARA USO EN AUTOMÓVILES

EN

X-A90M FR
MONO POWER AMPLIFIER

X-A70F ES
4 CHANNEL POWER AMPLIFIER

X-A90V
4 CHANNEL + MONO POWER AMPLIFIER

• OWNER’S MANUAL • MANUAL DE OPERACIÓN

Please read before using this equipment. Léalo antes de utilizar este equipo.
• MODE D’EMPLOI
Veuillez lire avant d’utiliser cet appareil.

ALPINE ELECTRONICS MARKETING, INC. ALPINE ELECTRONICS OF U.K. LTD.

1-7, Yukigaya-Otsukamachi, Ota-ku, Alpine House
Tokyo 145-0067, JAPAN Fletchamstead Highway, Coventry CV4 9TW, U.K.
Phone: 03-5499-4531 www.alpine.co.uk

ALPINE ELECTRONICS OF AMERICA, INC. ALPINE ELECTRONICS France S.A.R.L.

19145 Gramercy Place, Torrance, 184 allée des Erables
California 90501, U.S.A. CS 52016 – Villepinte
Phone 1-800-ALPINE-1 (1-800-257-4631) 95 945 Roissy CDG cedex
FRANCE
ALPINE ELECTRONICS OF AUSTRALIA PTY. LTD. Phone : + 33(0)1 48 63 89 89
161-165 Princes Highway, Hallam
Victoria 3803, Australia ALPINE ITALIA S.p.A.
Phone 03-8787-1200 Viale Cristoforo Colombo, 8
20090 Trezzano sul Naviglio MI, Italy
ALPINE ELECTRONICS GmbH Phone +39 02 484781
Wilhelm-Wagenfeld-Str. 1-3,
80807 München, Germany ALPINE ELECTRONICS DE ESPAÑA, S.A.
Phone 089-32 42 640 Portal de Gamarra 36, Pabellón, 32
01013 Vitoria (Alava)-APDO 133, Spain
Phone 945-283588

Designed by ALPINE Japan

Printed in Korea
JEIL Moon Hwa Co. 68-33122Z89-A (Y-A5)
18-6, 3Ga, Pil_dong, Jung_gu, Seoul, Korea M3514640010
 English

DO NOT DISASSEMBLE OR ALTER.

CONTENTS Doing so may result in an accident, fire or electric shock.
WARNING................................................................................1 USE THIS PRODUCT FOR MOBILE 12V APPLICATIONS.
SERVICE CARE .......................................................................2 Use for other than its designed application may result in
ACCESSORIES ........................................................................2 fire, electric shock or other injury.
INSTALLATION.......................................................................3
REMOVING THE TOP COVER .............................................3 USE THE CORRECT AMPERE RATING WHEN REPLACING
ATTACHING THE TERMINAL COVERS AND FUSES.
LOGO PLATE .......................................................................4 Failure to do so may result in fire or electric shock.
CONNECTIONS .....................................................................5
DO NOT BLOCK VENTS OR RADIATOR PANELS.
CONNECTION CHECK LIST ................................................8
Doing so may cause heat to build up inside and may result
SWITCH SETTINGS ...............................................................9 in fire.
SYSTEM DIAGRAMS ......................................................... 12
SPECIFICATIONS ................................................................ 20 MAKE THE CORRECT CONNECTIONS.
Failure to make the proper connections may result in fire or
product damage.
WARNING USE ONLY IN CARS WITH A 12 VOLT NEGATIVE GROUND.
(Check with your dealer if you are not sure.) Failure to do so
Points to Observe for Safe may result in fire, etc.

Usage BEFORE WIRING, DISCONNECT THE CABLE FROM THE

NEGATIVE BATTERY TERMINAL.
Read this manual carefully before using the system
components. They contain instructions on how to Failure to do so may result in electric shock or injury due to
use this product in a safe and effective manner. electrical shorts.
Alpine cannot be responsible for problems
DO NOT ALLOW CABLES TO BECOME ENTANGLED IN
resulting from failure to observe the instructions in
SURROUNDING OBJECTS.
this manual.
Arrange wiring and cables in compliance with the manual
to prevent obstructions when driving. Cables or wiring
This symbol means important instructions.
that obstruct or hang up on places such as the steering
WARNING Failure to heed them can result in serious wheel, gear lever, brake pedals, etc. can be extremely
injury or death. hazardous.

DO NOT OPERATE ANY FUNCTION THAT TAKES YOUR DO NOT SPLICE INTO ELECTRICAL CABLES.
ATTENTION AWAY FROM SAFELY DRIVING YOUR Never cut away cable insulation to supply power to other
VEHICLE. equipment. Doing so will exceed the current carrying
Any function that requires your prolonged attention capacity of the wire and result in fire or electric shock.
should only be performed after coming to a complete
stop. Always stop the vehicle in a safe location before DO NOT DAMAGE PIPE OR WIRING WHEN DRILLING
performing these functions. Failure to do so may result in HOLES.
an accident. When drilling holes in the chassis for installation, take
precautions so as not to contact, damage or obstruct
KEEP THE VOLUME AT A LEVEL WHERE YOU CAN STILL pipes, fuel lines, tanks or electrical wiring. Failure to take
HEAR OUTSIDE NOISES WHILE DRIVING. such precautions may result in fire.
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.

1-EN
DO NOT USE BOLTS OR NUTS IN THE BRAKE OR
STEERING SYSTEMS TO MAKE GROUND CONNECTIONS. SERVICE CARE
Bolts or nuts used for the brake or steering systems (or any
IMPORTANT NOTICE
other safety-related system), or tanks should NEVER be
used for installations or ground connections. Using such
This Amplifier has been type tested and found to
parts could disable control of the vehicle and cause fire etc. comply with the limits for a Class B computing
device in accordance with the specifications in
KEEP SMALL OBJECTS SUCH AS BATTERIES OUT OF THE Subpart J of Part 15 of FCC Rules. This equipment
REACH OF CHILDREN. generates and uses radio frequency energy, and it
Swallowing them may result in serious injury. If swallowed, must be installed and used properly in accordance
consult a physician immediately. with the manufacturer’s instructions.

This symbol means important instructions. SERIAL NUMBER:

CAUTION Failure to heed them can result in injury or INSTALLATION DATE:
property damages. INSTALLATION TECHNICIAN:
PLACE OF PURCHASE:
HALT USE IMMEDIATELY IF A PROBLEM APPEARS.
Failure to do so may cause personal injury or damage to IMPORTANT
the product. Return it to your authorized Alpine dealer or Please record the serial number of your unit in
the nearest Alpine Service Center for repairing. the space provided here and keep it as a
permanent record. The serial number plate is
HAVE THE WIRING AND INSTALLATION DONE BY located on the rear of the unit.
EXPERTS.
The wiring and installation of this unit requires special For European Customers
technical skill and experience. To ensure safety, always
Should you have any questions about warranty,
contact the dealer where you purchased this product to
please consult your store of purchase.
have the work done.
For Customers in other Countries
USE SPECIFIED ACCESSORY PARTS AND INSTALL THEM
SECURELY. IMPORTANT NOTICE
Be sure to use only the specified accessory parts. Use of Customers who purchase the product with which
other than designated parts may damage this unit this notice is packaged, and who make this
internally or may not securely install the unit in place. This purchase in countries other than the United States
may cause parts to become loose resulting in hazards or of America and Canada, please contact your dealer
product failure. for information regarding warranty coverage.

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
ACCESSORIES
the seat rails) or sharp or pointed edges. This will prevent
• Self-Tapping Screw (M4 × 20) ......................................4
crimping and damage to the wiring. If wiring passes
through a hole in metal, use a rubber grommet to prevent • Terminal Cover (F)/(L)/(R) ......................................1 SET
the wire’s insulation from being cut by the metal edge of • Battery Connector ...........................................................1
the hole. • Speaker Connector
X-A90M .............................................................................1
DO NOT INSTALL IN LOCATIONS WITH HIGH MOISTURE X-A70F ..............................................................................2
OR DUST.
X-A90V ..............................................................................3
Avoid installing the unit in locations with high incidence of
• Hexagon Wrench (Large)/(Small) .......................1 SET
moisture or dust. Moisture or dust that penetrates into this
unit may result in product failure. • Logo Plate ...........................................................................1

2-EN
 INSTALLATION REMOVING THE TOP
Due to the high power output of the X-A90M/ COVER
X-A70F/X-A90V considerable heat is produced
when the amplifier is in operation. For this reason, When performing the Switch Setting, you must
the amplifier should be mounted in a location remove the Top Cover.
which will allow for free circulation of air, such as • Remove the Top Cover before installing or after
inside the trunk. For alternate installation locations, removing the Terminal Cover (F). For details on
please contact your authorized Alpine dealer. how to remove the Terminal Cover (F), see
Mount the amplifier before installing the ”ATTACHING THE TERMINAL COVERS AND LOGO
Terminal Cover (F)/(L)/(R). PLATE” (page 4).

1. Using the amplifier as a template, mark the four 1. Remove the hexagon screws using the supplied
screw locations. Hexagon Wrench (Small).
2. Make sure there are no objects behind the Top Cover
surface that may become damaged during
drilling.
3. Drill the screw holes.
4. Position the X-A90M/X-A70F/X-A90V over the
screw holes, and secure with four self-tapping
screws.
Self-Tapping Screws
M4 × 20 (Included)

Hexagon Screws
(e.g. X-A90V)

2. Slide the Top Cover, and lift it to remove.

• Be sure not to damage the indicator area.

Holes

(e.g. X-A90V)

(e.g. X-A90V)

3-EN
 ATTACHING THE CAUTION
TERMINAL COVERS AND Do not lift or carry the unit by the attached
terminal covers.
LOGO PLATE The terminal cover may detach causing the unit to
fall resulting in personal injury or damage to the
Attach the terminal covers (included) after unit or the vehicle.
connections and confirmation of correct operation.
Attaching the terminal covers will improve the
appearance of the unit.
How to attach the terminal covers:
1. Attach the Terminal Cover (L)/(R) based on the
guide hole of the amplifier.
2. Attach the Terminal Cover (F) based on the
guide hole of the amplifier.
• Push in until the hook is securely engaged.
Terminal Cover (L)

Terminal Cover (R)

Guide Hole

Terminal Cover (F)

(e.g. X-A90V)

3. Peel the backing paper from the Logo Plate,

then attach it to this unit in your desired
direction.
Logo plate

Backing Paper

(e.g. X-A90V)

4-EN
 CONNECTIONS
Before making connections, be sure to turn the power off to all audio components.

External Fuse*2
*1

*3, 4
Vehicle’s battery
Vehicle’s chassis
*1 For details on the wires size to be used, refer to the supplied “Cautions on Power Supply Wires Connection” and
“Cautions on Power Supply Wires” (page 19), and then use the wire of the specified size.
*2 Be sure to add an External Fuse (e.g. Fuse Block, Circuit Breaker) with the battery lead as close as possible to the
battery’s positive (+) terminal. Add an external fuse with the same capacity, or a slightly larger capacity, as the sum total
of the fuse capacities of the amplifier.
For details on the fuse capacity of this machine, see “Battery Lead ( )” (page 6).
*3 Connect all equipment to the same ground point while keeping wire length as short as possible.
*4 To securely connect the ground lead, use an already installed screw.
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.

5-EN
 Power Supply Terminal Battery Lead (Sold Separately)
Be sure to add an External Fuse (e.g. Fuse Block,
Fuse Circuit Breaker) with the battery lead as close as
X-A90M/X-A90V ................................................30 A x 3 possible to the battery’s positive (+) terminal.
X-A70F ..................................................................35 A x 2 This fuse will protect your vehicle’s electrical
USE THE CORRECT AMPERE RATING WHEN system in case of a short circuit. See below for
REPLACING FUSES. appropriate fuse value requirement:
Failure to do so may result in fire or electric X-A90M/X-A90V .......................................90 amp fuse
shock. X-A70F .........................................................70 amp fuse
• For details on the wires size to be used, refer to
Speaker Input Level Switch the supplied “Cautions on Power Supply Wires
Switch according to the Speaker input mode. Connection” and “Cautions on Power Supply
a) When making a speaker input Wires” (page 19), and then use the wire of
connection with RCA Extension the specified size.
Cables (sold separately), set to “LO”. Remote Turn-On Lead (Sold Separately)
Connect this lead to the remote turn-on
(positive trigger, (+) 12 V only) lead of your head
unit. If a remote turn-on lead is not available, see
b) When making a speaker input
“CONNECTION CHECK LIST” section on
connection with Speaker-RCA
page 8 for alternative method.
Conversion Cables (sold separately),
• When connecting the speaker output leads of
set to “HI”.
the head unit to this unit with a Speaker-RCA
Conversion cable (sold separately), you do not
need to connect the remote turn-on lead,
RCA Input Jacks owing to the “REMOTE SENSING” function of
Connect these jacks to the line out leads on your this unit. However, the “REMOTE SENSING”
head unit using RCA extension cables or function may not work depending on the
Speaker-RCA Conversion cable (sold separately). signal source connected. In such a case,
Be sure to observe correct channel connections; connect the remote turn-on lead to an
Left to Left and Right to Right. incoming power supply cord (accessory
power) in the ACC position.
Pre-Out Jacks (X-A90M only)
These jacks provide a line level output. This is an Ground Lead (Sold Separately)
ideal output for driving a second subwoofer Connect this lead securely to a clean, bare metal
amp. This output is full-range, and is not affected spot on the vehicle’s chassis. Verify this point to
by the crossover. be a true ground by checking for continuity
between that point and the negative (–)
Remote Bass Control (Optional) terminal of the vehicle’s battery. Ground all your
Connect the Remote Bass Control Unit audio components to the same point on the
RUX-KNOB or RUX-KNOB.2 (sold separately) to chassis to prevent ground loops while keeping
adjust the output level remotely. This is not to wire length as short as possible.
replace appropriate gain level setting between • For details on the wires size to be used, refer to
the amplifier and head unit. the supplied “Cautions on Power Supply Wires
• X-A70F supports RUX-KNOB.2 only. Connection” and “Cautions on Power Supply
Speaker Output Terminals Wires” (page 19), and then use the wire of
the specified size.
Battery Connector
Make the Battery, Remote Turn-on and Ground Speaker Connector
lead connections (as shown) to the Battery Make the Speaker Output Lead (+)/(-)
Connector. connections to the Speaker Connector.
Insert Plug to Terminal . Insert Plug to Terminal .
• For details on how to connect, see “Cautions • For details on how to connect, see “Cautions
on wire lead connections” (page 7). on wire lead connections” (page 7).
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.

6-EN
About Subwoofer Input/Output Terminals 3. Tighten the hexagon hole screw with the
(X-A90M/X-A90V only) hexagon wrench (Large or Small) (included) to
• The input is stereo but the output is monaural. secure the lead.
• Reversing subwoofer polarity (swapping positive
Before making this connection, use insulated
and negative connections to the subwoofer) may
shrink tubing to cover any exposed wire
be desirable in some installations for optimum
extending beyond the terminal.
bass performance.
About Bridged Connections Battery Connector
In the bridged mode, connect the left positive to
the positive terminal of the speaker and the right
negative to the negative terminal of the speaker.
Do not use the speaker (–) terminals as a common Battery Lead
lead between the left and right channels.
NOTE:
• Do not connect the speaker (–) terminal to the
vehicle’s chassis.
Cautions on wire lead connections Remote Turn On Lead
Hexagon wrench
When using third-party wire cables (power supply
wire), use the supplied screws to simplify the
connection. Refer to the description below for the Ground Lead
proper procedure. If you are in doubt about how to
make this connection, consult your dealer. Hexagon wrench

1. Check the wire size.

• For details on the wires size to be used, refer to Speaker Connector
the supplied “Cautions on Power Supply Wires
Connection” and “Cautions on Power Supply
Wires” (page 19), and then use the wire of
the specified size.
• If the wire gauge used is unknown, ask your
dealer.
2. Remove the insulation from the ends of the wire
leads by about 7 – 10 mm (9/32” – 13/32”).
7 – 10 mm
(9/32” – 13/32”) Speaker Output Lead (+)

Lead end side of

the product Speaker Output Lead (-)

NOTES:
Twist the tip of wire leads • Be sure to use the Hexagon hole screw attached
NOTES: to the Battery Connector or Speaker Connector.
• If length of the exposed wire is too short, a poor • For safety reasons, connect the battery leads last.
connection may occur causing operation failure • To prevent disconnection of the leads or
or sound interruption. dropping of the unit, do not use the cabling to
• On the other hand, if the length is too long, an carry the unit.
electrical short-circuit may occur.

7-EN
 Blue/White
CONNECTION CHECK LIST Power Antenna
Remote Turn-On Lead
Please check your head unit for the conditions To other Alpine component’s Remote Turn-On
listed below:
Leads
Remote Turn-On Lead SPST Switch (optional)
a. The head unit does not have a remote turn-on Fuse (3A)
or power antenna lead.
As close as possible to the vehicle’s ignition tap
b. The head unit’s power antenna lead is activated
only when the radio is on (turns off in the tape Ignition Source
or CD Mode).
c. The head unit’s power antenna lead is logic level Amplifier
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 X-A90M/X-A70F/X-A90V
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
X-A90M/X-A70F/X-A90V 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 X-A90M/X-A70F/X-A90V turn-on lead. This
switch will then be used to turn on (and off ) the
X-A90M/X-A70F/X-A90V. 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.

8-EN
 SWITCH SETTINGS
When performing Switch Settings, remove the Top Cover. For details, see “REMOVING THE TOP COVER”
(page 3).
• Before switching each Selector Switch, turn off the power and insert a small screwdriver, etc.,
perpendicularly to the Switch.

Subsonic Filter (X-A90M/X-A90V only) Crossover Frequency Adjustment Knob

The subsonic filter for cutting ultra low (LP FILTER) (X-A90M/X-A90V only)
frequencies from the input signal before being Use this control to adjust the crossover
amplified. frequency between 50 to 400 Hz.
This is desirable for several reasons:
– To protect speakers too small or not capable Bass EQ Adjustment Knob (X-A90M/X-A90V
of reproducing ultra low frequencies. only)
– To minimize power wasted from reproducing Add a 50 Hz bass boost up to +12 dB to tune
inaudible sound. your bass response.
– To protect subwoofers in vented enclosures
from over excursion below the tuning
frequency.

9-EN
 Input Gain Adjustment Control Crossover Mode Selector Switch (X-A90V
Set the X-A90M/X-A70F/X-A90V input gain to only)
the minimum position. Using a dynamic CD as a
source, increase the head unit volume until the a) Set to the “OFF” position when the
output distorts. Then, reduce the volume 1 step amplifier will be used for driving
(or until the output is no longer distorted). Now, full range speakers or when using
increase the amplifier gain until the sound from an external electronic crossover.
the speakers becomes distorted. Reduce the The full frequency bandwidth will
gain slightly so the sound is no longer distorted be output to the speakers with no
to achieve the optimum gain setting. high or low frequency attenuation.

Crossover Mode Selector Switch (X-A70F b) Set to the “ON” position when the
only) amplifier is used to drive a tweeter/
midrange system. The frequencies
a) Set to the “OFF” position when the below the crossover point will be
amplifier will be used for driving attenuated at 12 dB/octave.
full range speakers or when using
an external electronic crossover. NOTE:
The full frequency bandwidth will • In this case the maximum Bass EQ
be output to the speakers with no boost level is reduced.
high or low frequency attenuation.
Input Channel Selector Switch (SUBWOOFER)
b) Set to the “HP” position when the (X-A90V only)
amplifier is used to drive a tweeter/
midrange system. The frequencies a) When this switch is placed in the
below the crossover point will be “1+2+3+4” position, all the signals
attenuated at 12 dB/octave. are mixed and come out from the
subwoofer. This setting provides
NOTE:
signal to the subwoofer channel
• In this case the maximum Bass EQ
when only 4 channel input is
boost level is reduced.
available.
c) Set to the “LP” position when the
b) Setting this switch to “SUB” will
amplifier is used to drive a
send the signal at the inputs of SUB
subwoofer. The frequencies above
to subwoofer of the X-A90V.
the crossover point will be
attenuated at 12 dB/octave.

Crossover Frequency Adjustment Knob

(X-A70F/X-A90V only)
Use this control to adjust the crossover
frequency between 50 and 400 Hz.
Input Channel Selector Switch (CHANNEL-3/4)
(X-A70F/X-A90V only)
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.

10-EN
About Power Indicator

Power Indicator

Lights up when power is on.

Is off when power is off.

Indication color Status Solution

Blue Amplifier circuit is normal.
Red Operating temperature is Decrease the vehicle’s interior temperature to a
(blinking) high. normal level.
The indicator color changes to blue.
Red Amplifier circuit is abnormal. Turn off the power supply and eliminate the cause.
An electrical short has Then turn on the unit and verify that the indicator
occurred, or supply current is color has changed to blue.
too high. If it remains red, turn off the unit and consult your
dealer.
Operating temperature is too Decrease the vehicle’s interior temperature to a
high. normal level.
The indicator color changes to blue.
Power supply voltage is too Use the correct power supply voltage.
high. The indicator color changes to blue.

11-EN
 SYSTEM DIAGRAMS
Before making a connection, check the total number of impedance of the speaker connected to the unit. If
you have any questions, contact the nearest Alpine dealer.

Basic Connection Diagram for X-A90M

Head Unit, etc. Subwoofer
Front Output Dual Voice Coil Subwoofer
Rear Output RCA Extension Cable (Sold Separately)
Subwoofer Output Speaker-RCA Conversion Cable (Sold Separately)
Front Speakers Y-Adapter (Sold Separately)
Rear Speaker

Subwoofer System

[LO]

1 Subwoofer System

2 Subwoofer System (MONO)

* If the connected head unit does not have a Speaker Output and RCA Extension Cables ( ) cannot be
used, you can use the Speaker-RCA Conversion Cable ( ) (sold separately). For details on how to make a
connection, see “About Connection to the Speaker Input Level System” (page 18).

12-EN
Dual Voice Coil Subwoofer System

Refer to “Subwoofer System” (page 12).

Parallel connection Series connection

* In the case of using a series connection, the lead wire of the Dual Voice Coil Subwoofer ( ) can be
connected to either the (+)/(-) terminal of the Speaker Connector ( ).

Multiple Mono Amplifier System (Connection example with X-A70F)

[LO]

[LO]

• For details on the Input Channel Selector Switch ( ) of X-A70F, see “Basic Connection Diagram for X-A70F”
(page 14).

13-EN
Basic Connection Diagram for X-A70F
Head Unit, etc. Subwoofer
Front Output Dual Voice Coil Subwoofer
Rear Output RCA Extension Cable (Sold Separately)
Subwoofer Output Speaker-RCA Conversion Cable (Sold Separately)
Front Speakers Y-Adapter (Sold Separately)
Rear Speaker

For X-A70F, change the Input Channel Selector Switch ( ) setting according to the number of channels of
the speaker input.

4-Channel Input: 2-Channel Input:

[3/4] [1/2]

4 Speaker System

[LO]

* If the connected head unit does not have a Speaker Output and RCA Extension Cables ( ) cannot be
used, you can use the Speaker-RCA Conversion Cable ( ) (sold separately). For details on how to make a
connection, see “About Connection to the Speaker Input Level System” (page 18).

14-EN
2 Speaker + 1 Subwoofer System (Bridged Connections)

Refer to “4 Speaker System” (page 14).

2 Speaker System (Bridged Connections)

Refer to “4 Speaker System” (page 14).

15-EN
Basic Connection Diagram for X-A90V
Head Unit, etc. Subwoofer
Front Output Dual Voice Coil Subwoofer
Rear Output RCA Extension Cable (Sold Separately)
Subwoofer Output Speaker-RCA Conversion Cable (Sold Separately)
Front Speakers Y-Adapter (Sold Separately)
Rear Speaker

For X-A70F, change the Input Channel Selector Switch ( )/( ) setting according to the number of
channels of the speaker input.

5-Channel Input: 4-Channel Input: 2-Channel Input:

[3/4] [1/2]

[SUB] [1+2+3+4]

4 Speaker + Subwoofer System

[LO]

1 Subwoofer System

2 Subwoofer System (MONO)

* If the connected head unit does not have a Speaker Output and RCA Extension Cables ( ) cannot be
used, you can use the Speaker-RCA Conversion Cable ( ) (sold separately). For details on how to make a
connection, see “About Connection to the Speaker Input Level System” (page 18).

16-EN
4 Speaker + Dual Voice Coil Subwoofer System

Parallel connection Series connection

Refer to “4 Speaker + Subwoofer System” (page 16).

* In the case of using a series connection, the lead wire of the Dual Voice Coil Subwoofer ( ) can be
connected to either the (+)/(-) terminal of the Speaker Connector ( ).

2 Speaker + 2 Subwoofer (MONO) System (Bridged Connections)

Refer to “4 Speaker + Subwoofer System” (page 16).

17-EN
 About Connecting to the Speaker Input Level System
When connecting by using the Speaker-RCA Conversion Cable ( ) (sold separately), switch the Speaker
Input Level Switch ( ) to “HI”.

e.g X-A70F
RCA Input Jacks

Speake Input Level Switch

[HI]

Rear Speaker output lead (R)

Rear Speaker output lead (L)

Front Speaker output lead (R)

Front Speaker output lead (L)

• Do not mistake the Speaker Output Lead on the head unit side connected to this unit.
Front Speaker output (L)/(R) to CH1/CH2, Rear Speaker output (L)/(R) to CH3/CH4
• For the “Speaker Input Level System” setting, connecting the Remote Turn-On Lead is not required due to
the “REMOTE SENSING” function of this product. 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.

Important Tips on Bridging an Amplifier

Low output will result if only one channel input is used. The Y-adapter is not required if a stereo/mono pair
line output is used to drive both inputs of the bridged amp.

Proper connection Improper connection

One signal One signal

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 Cautions on Power Supply Wires
Use the specified wire size according to the total fuse capacity of the amplifier to be installed and the wire
length.
For details on the wire size to be used, refer to the supplied “Cautions on Power Supply Wires Connection”
and the following connection example.

Connection example when installing an amplifier alone

• When the wire length from the amplifier to the vehicle’s battery is 5 m
Wire size used for (A): 4 AWG/21 mm2
• External Fuse capacity: Make it equal to or larger than the fuse capacity of the amplifier
X-A90M/X-A90V: equal to or larger than 90 A
X-A70F: equal to or larger than 70 A
(A)
External Fuse
Amplifier

Vehicle’s chassis Vehicle’s battery

Connection example when installing two amplifiers with a fuse capacity of 90 A

and one amplifier with 70 A
• When the wire length from each amplifier to the distribution block is 1 m
Wire size used for (B): 4 AWG/21 mm2 (or 8 AWG/8 mm2)
• When the wire length from the distribution block to the vehicle’s battery is 4 m
Wire size used for (C): 1/0 AWG/53 mm2
• External Fuse capacity: Make it equal to or larger than total fuse capacity of the number of amplifiers
installed
90 A + 90 A + 70 A = equal to or larger than 250 A
(B) (C)

External Fuse
Amplifier
(e.g. 90 A)
Distribution block
Amplifier Vehicle’s battery

(e.g. 90 A)
Vehicle’s chassis
Amplifier

(e.g. 70 A)

NOTE:
• If the length of the power and ground cables exceed 1 m, or if you connect more than one amplifier, a
distribution block should be used.

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 SPECIFICATIONS
X-A90M
Performance
Per Channel, Ref.: 4 Ω, 14.4 V 600 W RMS x 1
Power Output
Per Channel, Ref.: 2 Ω, 14.4 V 900 W RMS x 1
Ref.: 10 W into 4 Ω ≤0.02%
THD+N
Ref.: Rated Power into 4 Ω ≤0.07%
IHF A-wtd + AES-17
>83 dB
Ref.: 1W into 4 Ω
S/N Ratio
IHF A-wtd + AES-17
>107 dB
Ref.: Rated Power into 4 Ω
+0/-3 dB, Ref.: 1 W into 4 Ω 8 Hz - 400 Hz
Frequency Response
+0/-1 dB, Ref.: 1 W into 4 Ω 10 Hz - 300 Hz
Damping Factor Ref.: 10 W into 4 Ω at 100 Hz >1,500
Control
RCA Input Hi: 0.4 - 10 V
Input Sensitivity
Ref.: Rated Power into 4 Ω Lo: 0.1 - 4.0 V
LPF: 50 Hz - 400 Hz
Variable HPF/LPF
(-24 dB/oct.)
Crossover
8 Hz - 40 Hz
Variable Subsonic
(-24 dB/oct.)
0 to +12 dB
Equalizer Bass EQ (fc=50 Hz)
(Variable)
Remote Level* Linear Attenuation 0 to -20 dB
General
Input Impedance >10 kΩ
Preamp Output CH-1/2 Input Pass-through, Buffered 4 V max
Width 297 mm (11-3/4”)
Dimensions Height 50.8 mm (2”)
Depth 192 mm (7-5/8”)
Weight 3.2 kg (7 lb 1 oz)

* Requires optional RUX-KNOB or RUX-KNOB.2.

NOTE:
• Specifications and design are subject to change without notice.

20-EN
 X-A70F
Performance
Per Channel, Ref.: 4 Ω, 14.4 V 120 W RMS x 4
Power Output Per Channel, Ref.: 2 Ω, 14.4 V 175 W RMS x 4
Bridged, Ref.: 4 Ω, 14.4 V 350 W RMS x 2
Ref.: 10 W into 4 Ω ≤0.02%
THD+N
Ref.: Rated Power into 4 Ω ≤0.07%
IHF A-wtd + AES-17
>87 dB
Ref.: 1W into 4 Ω
S/N Ratio
IHF A-wtd + AES-17
>106 dB
Ref.: Rated Power into 4 Ω
+0/-3 dB, Ref.: 1 W into 4 Ω 10 Hz - 60 kHz
Frequency Response
+0/-1 dB, Ref.: 1 W into 4 Ω 15 Hz - 30 kHz
Damping Factor Ref.: 10 W into 4 Ω at 100 Hz >500
Control
Selectable Input Signal CH-3/4:
Input Select
Configuration (2ch/4ch Input) CH-1/2 or CH-3/4
RCA Input Hi: 0.5 - 10 V
Input Sensitivity
Ref.: Rated Power into 4 Ω Lo: 0.2 - 4.0 V
50 Hz - 400 Hz
Crossover Variable HPF/LPF
(-12 dB/oct.)
Remote Level* Linear Attenuation 0 to -20 dB
General
Input Impedance >10 kΩ
Width 297 mm (11-3/4”)
Dimensions Height 50.8 mm (2”)
Depth 192 mm (7-5/8”)
Weight 3.2 kg (7 lb 1 oz)

* Requires optional RUX-KNOB.2.

NOTES:
• Specifications and design are subject to change without notice.
• To play back high res sound sources, it is necessary to make all the audio systems High-resolution audio
compatible devices.

21-EN
 X-A90V
CH-1/2/3/4 SUBWOOFER
Performance
Per Channel, Ref.: 4 Ω, 14.4 V 75 W RMS x 4 300 W RMS x 1
Power Output Per Channel, Ref.: 2 Ω, 14.4 V 100 W RMS x 4 500 W RMS x 1
Bridged, Ref.: 4 Ω, 14.4 V 200 W RMS x 2 –
Ref.: 10 W into 4 Ω ≤0.02% ≤0.02%
THD+N
Ref.: Rated Power into 4 Ω ≤0.07% ≤0.07%
IHF A-wtd + AES-17
>87 dB >80 dB
Ref.: 1W into 4 Ω
S/N Ratio
IHF A-wtd + AES-17
>105 dB >104 dB
Ref.: Rated Power into 4 Ω
+0/-3 dB, Ref.: 1 W into 4 Ω 10 Hz - 60 kHz 8 Hz - 400 Hz
Frequency Response
+0/-1 dB, Ref.: 1 W into 4 Ω 15 Hz - 30 kHz 10 Hz - 300 Hz
Damping Factor Ref.: 10 W into 4 Ω at 100 Hz >500 >1,000
Control
Selectable Input Signal CH-3/4: CH-1+2+3+4
Input Select
Configuration (2ch/4ch/6ch Input) CH-1/2 or CH-3/4 or SUBWOOFER
RCA Input Hi: 0.5 - 10 V Hi: 0.4 - 10 V
Input Sensitivity
Ref.: Rated Power into 4 Ω Lo: 0.2 - 4.0 V Lo: 0.1 - 4.0 V
HPF: 50 Hz - 400 Hz LPF: 50 Hz - 400 Hz
Variable HPF/LPF
(-12 dB/oct.) (-24 dB/oct.)
Crossover
8 Hz - 40 Hz
Variable Subsonic –
(-24 dB/oct.)
0 to +12 dB
Equalizer Bass EQ (fc=50 Hz) –
(Variable)
Remote Level* Linear Attenuation – 0 to -20 dB
General
Input Impedance >10 kΩ
Width 297 mm (11-3/4”)
Dimensions Height 50.8 mm (2”)
Depth 192 mm (7-5/8”)
Weight 3.3 kg (7 lb 4 oz)

* Requires optional RUX-KNOB or RUX-KNOB.2.

NOTES:
• Specifications and design are subject to change without notice.
• To play back high res sound sources, it is necessary to make all the audio systems High-resolution audio
compatible devices.

22-EN