Connecting The Unit - Pioneer GM-X942 Owner's Manual

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.
Decibel
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.

Connecting the Unit

CAUTION
• Disconnect the negative (–) terminal of the battery • Make sure that wires will not interfere with mov-
to avoid the risk of short-circuit and damage to ing parts of the vehicle, such as the gearshift,
the unit. handbrake or seat sliding mechanism.
• Secure the wiring with cable clamps or adhesive • Do not shorten any wires. Otherwise the protec-
tape. To protect the wiring, wrap adhesive tape tion circuit may fail to work when it should.
around it where they lie against metal parts. • Never feed power to other equipment by cutting
• Do not route wires where they will get hot, for the insulation of the power supply wire to tap
example where the heater will blow over them. If from the wire. The current capacity of the wire
the insulation heats up, it may become damaged, will be exceeded, causing overheating.
resulting in a short-circuit through the vehicle
body.
To prevent damage
• Do not ground the speaker wire directly or con- • Speakers to be connected to the amplifier should
nect a negative (–) lead wire for several speakers. conform with the standards listed below. If they do
• This unit is for vehicles with a 12-volt battery and not conform, they may catch fire, emit smoke or
negative grounding. Before installing it in a recre- become damaged. The speaker impedance must be
ational vehicle, truck, or bus, check the battery 1 to 8 ohms for stereo connection, and 2 to 8 ohms
voltage. for monaural and other bridge connection.
• If the car stereo is kept on for a long time while • Install and route the separately sold battery wire
the engine is at rest or idling, the battery may go as far away as possible from the speaker wires.
dead. Turn the car stereo off when the engine is at Install and route the separately sold battery wire
rest or idling. and ground wire, speaker wires, and the amplifier
• If the system remote control wire of the amplifier as far away as possible from the antenna, antenna
is connected to the power terminal through the cable and tuner.
ignition switch (12 V DC), the amplifier will
• Cords for this product and those for other prod-
always be on when the ignition is on— regardless
ucts may be different colors even if they have the
of whether the car stereo is on or off. Because of
same function. When connecting this product to
this, the battery could go dead if the engine is at
another product, refer to the supplied Installation
rest or idle.
manuals of both products and connect cords that
have the same function.
GM-X942
Speaker Channel Speaker Type Power
Subwoofer Nominal input: Min. 120 W
Two-channel
Other than subwoofer Max. input: Min. 200 W
Subwoofer Nominal input: Min. 330 W
One-channel
Other than subwoofer Max. input: Min. 600 W
GM-X742
Speaker Channel Speaker Type Power
Subwoofer Nominal input: Min. 100 W
Two-channel
Other than subwoofer Max. input: Min. 160 W
Subwoofer Nominal input: Min. 270 W
One-channel
Other than subwoofer Max. input: Min. 480 W
Connection Diagram
Fuse (30 A)
Special red battery wire [RD-223] (sold separately).
After making all other connections at the amplifier,
Grommet
connect the battery wire terminal of the amplifier to
the positive (+) terminal of the battery.
Fuse (30 A)
Ground wire (black) [RD-223] (sold separately).
Connect to metal body or chassis.
RCA input Amplifier with
RCA input jacks
Connecting wires with RCA pin
plugs (sold separately).
Car stereo with
RCA output jacks
External Output
RCA output jack RCA input jack
Front side
Back side
GM-X942: Fuse (30 A) 2
GM-X742: Fuse (20 A) 2
Speaker output terminal
System remote control wire (sold separately).
See the "Connecting the
Connect the male terminal of this wire to the system
Speaker wires" section
remote control terminal of the car stereo (SYSTEM
for speaker connection
REMOTE CONTROL). The female terminal can be con-
instructions.
nected to the auto-antenna relay control terminal. If the car
stereo does not have a system remote control terminal, con-
nect the male terminal to the power terminal through the
ignition switch.