Pioneer GM-X404 User Manual
GM-X404
BRIDGEABLE FOUR-CHANNEL
POWER AMPLIFIER
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.
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.
AMPLIFICATEUR DE PUISSANCE
PONTABLE A QUATRE VOIES
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 TECHNICIEN 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.
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
FRANÇAISENGLISH
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
2
2
CH
INPUT SELECT
4
CH
INPUT LEVEL
LEVEL FREQ
BASSBOOST
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]
+≠+
≠
+≠+
≠
+≠+
≠
+≠+
≠
[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]
3
Fig. 1
Fig. 3
Fig. 2
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
DANGER OUS 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.
4
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 [RD222] 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.
ENGLISH
5
Setting of this Unit
(Fig. 1)
[1] Power Indicator
The power indicator lights when the
power is switched on.
[2] RCA Input Select Switch
For two-channel input, slide this switch
to the left. For four-channel input, slide
this switch to the right.
[3] BFC (Beat Frequency Control) Switch
If you hear a beat while listening to an
AM broadcast with your car stereo,
change the BFC switch using a small
screwdriver.
[4] Input Level Adjustment
Adjusting the input level controls A and
B will help match the output of the car
stereo to the Pioneer amplifier. Input
level control A is used to adjust the
volume of speaker output A; Input level
control B is used to adjust the volume of
speaker ouput B. Normally, set the
switch to the “500 mV” position. If the
output is low even when the volume of
the car stereo is turned up, turn these
controls clockwise. If there is distortion
when the volume of the car stereo is
turned up, turn these controls clockwise.
• If you only use one input pin plug, set
the input level controls for speaker
outputs A and B to the same position.
• Set the input level control to 500mV
when this amplifier is connected to a
Pioneer car stereo with RCA output
jacks. If the sound is too low or distorts, adjust the input level control.
[5] Speaker Out A: LPF (Low-Pass Filter)/
HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows
according to the type of the speaker that
is connected to the speaker output
connector and the car stereo system:
LPF/HPF
Select
Switch
LPF
(left)
OFF
(center)
HPF
(right)
* Set the LPF/HPF select switch to the HPF
(right) position if you want to cut the verylow-frequency range because it is not
necessary for the speaker you use.
Audio frequency
range tobe output
Very-low-frequency
range
Very-low-frequency
range to highfrequency range
Low-frequency
range to highfrequency range
*
Speaker Type
Sub-woofer
Other than
sub-woofer
Other than
sub-woofer
[6] Speaker Out A: Bass Boost Level
Control
Bass boost level control can boost the
level around the frequency selected by
the bass boost frequency control to 0 to
12 dB.
[7] Speaker Out A: Bass Boost Frequency
Control
You can select a bass boost frequency
from 40 to 120 Hz with the bass boost
control.
• [6] [7] can be adjusted only when the
LPF/HPF select switch is set to a position
other than HPF .
[8] Speaker Out B: HPF (High-Pass Filter)
Select Switch
Set the HPF select switch as follows
according to the car stereo system and
the type of speaker connected to the
speaker output:
HPF
Select
Switch
OFF
(left)
HPF
(right)
* Set the LPF/HPF select switch to the HPF
(right) position if you want to cut the verylow-frequency range because it is not
necessary for the speaker you use.
Audio frequency
range to be output
Very-low-frequency
range to highfrequency range
Low-frequency
range to highfrequency range
*
Speaker Type
Sub-woofer
Other than
sub-woofer
6
Connecting the Unit
CAUTION
• Remove the negative (–) terminal of the
battery to avoid the risk of short-circuit
and damage to the unit.
• Secure the wiring with cable clamps or
adhesive tape. To protect the wiring,
wrap adhesive tape around them where
they lie against metal parts.
• Do not route wires where they will get
hot, for example where the heater will
blow over them. If the insulation heats
up, it may become damaged, resulting in
a short-circuit through the vehicle body.
• Make sure that wires will not interfere
with moving parts of the vehicle, such as
the gearshift, handbrake or seat sliding
mechanism.
• Do not shorten any leads. Otherwise the
protection circuit may fail to work when it
should.
• Never feed power to other equipment by
cutting the insulation of the power supply
wire to tap from the wire. The current
capacity of the wire will be exceeded,
causing overheating.
• Always use the special red battery power
and ground wire [RD-222], which is sold
separately. Connect the special red
battery power cord 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.)
To prevent damage
• Do not ground the speaker wire directly
or connect a negative (–) wire for several
speakers.
• Speakers to be connected to the amplifier
should conform with the standards listed
below. Otherwise damage will be caused
to the speaker. The speaker impedance
must be 2 to 8 ohms.
Speaker
Channel Type
Four-
channel
Two-
channel
Threechannel
Speaker
output A
Threechannel
Speaker
output B
Sub-woofer
Other than Max. input:
sub-woofer Min. 60 W
Sub-woofer
Other than Max. input:
sub-woofer Min. 140 W
Sub-woofer
Other than Max. input:
sub-woofer Min. 60 W
Sub-woofer
Other than Max. input:
sub-woofer Min. 140 W
Power
Nominal input:
Min. 30 W
Nominal input:
Min. 70 W
Nominal input:
Min. 30 W
Nominal input:
Min. 70 W
If many units are connected
ENGLISH
• If you let the car engine idle for a long
time with the car stereo on, the battery
may go dead. Turn the car stereo off
when the engine is idling.
• If the blue lead of the amplifier is connected to the power terminal through the
ignition switch (12 VDC), the amplifier will
always be on when the ignition is on—
regardless of whether the car stereo is on
or off. Because of this, the battery could
go dead if you let the engine idle.
• This unit is for vehicles with a 12-volt
battery and negative grounding. Before
installing it in a recreational vehicle, truck,
or bus, check the battery voltage.
• Install and route the separately sold
special red battery wire [RD-222] as
faraway as possible from the speaker
wires. Install and route the separately
sold special red battery wire and ground
wire [RD-222], speaker wires, and the
amplifier as faraway as possible from the
antenna, antenna cable and tuner.
(Fig. 2)
[9] Special red battery wire [RD-222]
(sold separately)
After making all other connections
at the amplifier, connect the battery
lead terminal of the amplifier to the
positive (+) terminal of the battery.
[10] Ground wire (black) [RD-222]
(sold separately)
Connect to metal body or chassis.
[11] Fuse (Special red battery power wire:
30 A, Amplifier: 25 A)
7
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