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Thank you for purchasing this PIONEER product. It
is designed to give you many years of enjoyment.
PIONEER SUGGESTS USING A PROFESSIONAL
INSTALLER DUE TO THE COMPLEXITY OF THIS
PRODUCT
Please read all instructions and WARNINGS in this
manual before attempting operation. Should you
have any questions contact your nearest Pioneer
authorized dealer or installation specialist.
Nous vous remercions sincèrement pour l'achat de
ce produit PIONEER. Cet équipement a été conçu
pour vous donner une entière satisfaction durand de
longues années.
PIONEER RECOMMANDE D'UTILISER UN TECHNIC-
IEN DE MONTAGE PROFESSIONNEL EN RAISON
DE LA COMPLEXITE DE CE PRODUIT.
Il est également recommandé de lire toutes les
instructions, et tous les AVERTISSEMENTS de ce
manuel avant d'opérer cet équipement. Si vous avez
des questions, contactez votre fournisseur Pioneer
autorisé le plus proche, ou votre spécialiste pour
l'installation.
GM-
X
404
AMPLIFICATEUR DE PUISSANCE
PONTABLE A QUATRE VOIES
BRIDGEABLE FOUR-CHANNEL
POWER AMPLIFIER
Important
The serial number of this amplifier is written on
the bottom of this unit. For your own security
and convenience, write it down on the enclosed
warranty card. Keep the card handy for future
reference.
HRD0002-A(E)
06.8.23 4:10 PM
Page 1


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CONTENTS
Fig. 1 ~ Fig. 3 .................................. 3
Dear Customer................................. 4
Symbols ...................................... 5
WARNING ..................................... 5
Setting of this Unit ............................ 6
Connecting the Unit ........................... 7
Installation.................................... 10
Precautions ................................... 11
Specifications ................................ 12
TABLE DES MATIERES
Fig. 1 ~ Fig. 3 .................................. 3
Cher Client ................................... 13
Symboles .................................... 14
AVERTISSEMENT............................. 14
Réglage de cette unité ........................ 15
Comment connecter les unité ................. 16
Installation.................................... 20
Précautions ................................... 21
Spécifications ................................ 21
FRANÇAIS
ENGLISH
2
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3
2CH
INPUT SELECT
4CH
INPUT LEVEL
LEVEL
FREQ
BASS BOOST
0dB
+12dB 40Hz
120Hz
LPF
OFF
HPF
INPUT LEVEL
OFF
HPF
500mV
2V
400mV
500mV
2V
400mV
RCA
[2]
[3]
[1]
[4]
[5]
[6]
[7]
[4]
[8]
[41]
[43]
[42]
Fig. 1
Fig. 3
+
+
+
+
+
+
+
+
[12]
[11]
[9]
[10]
[11]
[23]
[13]
[15]
[22]
[17]
[16]
[18]
[17]
[20]
[18]
[18]
[17]
[21]
[18]
[17]
[17] [17] [16]
[19]
[18]
[18]
[14]
[19]
Fig. 2
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Page 3


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4
Selecting fine audio equipment such as the unit you've just
purchased is only the start of your musical enjoyment. Now it's
time to consider how you can maximize the fun and excitement
your equipment offers. This manufacturer and the Electronic
Industries Association's Consumer Electronics Group want you
to get the most out of your equipment by playing it at a safe
level. One that lets the sound come through loud and clear
without annoying blaring or distortion--and, most importantly,
without affecting your sensitive hearing.
Sound can be deceiving. Over time your hearing "comfort
level" adapts to higher volumes of sound. So what sounds
"normal" can actually be loud and harmful to your hearing.
Guard against this by setting your equipment at a safe level
BEFORE your hearing adapts.
To establish a safe level:
· Start your volume control at a low setting.
· Slowly increase the sound until you can hear it comfortably
and clearly, and without distortion.
Once you have established a comfortable sound level:
· Set the dial and leave it there.
Taking a minute to do this now will help to prevent hearing
damage or loss in the future. After all, we want you listening for
a lifetime.
We Want You Listening For A Lifetime
Used wisely, your new sound equipment will provide a
lifetime of fun and enjoyment. Since hearing damage from loud
noise is often undetectable until it is too late, this manufacturer
and the Electronic Industries Association's Consumer
Electronics Group recommend you avoid prolonged exposure
to excessive noise. This list of sound levels is included for your
protection.
Decible
Level
Example
30
Quiet library, soft whispers
40
Living room, refrigerator, bedroom away from traffic
50
Light traffic, normal conversation, quiet office
60
Air conditioner at 20 feet, sewing machine
70
Vacuum cleaner, hair dryer, noisy restaurant
80
Average city traffic, garbage disposals, alarm clock at
two feet.
THE FOLLOWING NOISES CAN BE
DANGEROUS UNDER CONSTANT EXPOSURE
90
Subway, motorcycle, truck traffic, lawn mower
100
Garbage truck, chain saw, pneumatic drill
120
Rock band concert in front of speakers, thunderclap
140
Gunshot blast, jet plane
180
Rocket launching pad
Information courtesy of the Deafness Research Foundation.
HRD0002-A(E)
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Symbols
The following two symbols are used in this
manual.
CAUTION
-- never do this.
This symbol indicates dangerous
actions which must be avoided.
Note
-- follow the instructions care-
fully.
This symbol indicates action which can
cause the equipment to fail if it is
wrongly performed.
WARNING
· For traffic safety and to maintain safe
driving conditions, keep the volume low
enough so that you can still hear normal
traffic sound.
· Check the connections of the power
supply and speakers if the fuse of the sold
separately special red battery wire [RD-
222] or the amplifier fuse blows. Detect
the cause and solve the problem, then
replace the fuse with another one of the
same size and rating.
· To prevent malfunction of the amplifier
and speakers, the protective circuit will
cut the power supply to the amplifier
(sound will stop) when an abnormal
condition occurs. In such a case, switch
the power of the system OFF, check
connection of the power supply and
speakers. Detect the cause and solve the
problem.
· Contact the dealer if you cannot detect
the cause.
· To prevent electric shock or short-circuit
during connection and installation, be
sure to disconnect the negative (­)
terminal of the battery beforehand.
· Always use the special red battery power
and ground wire [RD-222], which is sold
separately. Connect the special red
battery power wire directly to the car
battery and the black ground wire to the
car body. (The special red battery power
and ground wire [RD-222] are designed
so that the amplifier can be connected
safely.)
· Confirm that no parts are behind the
panel when drilling a hole for installation
of the amplifier. Be sure to protect all
cables and important equipment such as
fuel lines, brake lines and the electrical
wiring from damage.
· To ensure proper heat dissipation of the
amplifier, take care of the following
during installation.
-- Allow adequate space above the
amplifier for proper ventilation.
-- Do not cover the amplifier with a floor
mat or carpet.
5
ENGLISH
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Page 5