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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
• This unit is for vehicles with a 12-volt battery and
do not conform, they may catch fire, emit smoke
negative grounding. Before installing it in a recre-
or become damaged. The speaker impedance must
ational vehicle, truck or bus, check the battery
be 1 to 8 ohms. But in case of two-channel and
voltage.
other bridge connections, the speaker impedance
• If the car stereo is kept on for a long time while
must be 2 to 8 ohms.
the engine is at rest or idling, the battery may go
• Install and route the separately sold battery wire
dead. Turn the car stereo off when the engine is at
as far away as possible from the speaker wires.
rest or idling.
Install and route the separately sold battery wire,
• If the system remote control wire of the amplifier
ground wire, speaker wires and the amplifier as
is connected to the power terminal through the
far away as possible from the antenna, antenna
ignition switch (12 V DC), the amplifier will
cable and tuner.
always be on when the ignition is on— regardless
• Cords for this product and those for other prod-
of whether the car stereo is on or off. Because of
ucts may be different colors even if they have the
this, the battery could go dead if the engine is at
same function. When connecting this product to
rest or idle.
another product, refer to the supplied Installation
manuals of both products and connect cords that
have the same function.
Speaker Channel
Speaker Type
Power
Subwoofer
Nominal input: Min. 65 W
Four-channel
Other than subwoofer
Max. input: Min. 100 W
Subwoofer
Nominal input: Min. 170 W
Two-channel
Other than subwoofer
Max. input: Min. 240 W
Three-channel
Subwoofer
Nominal input: Min. 65 W
Speaker output A
Other than subwoofer
Max. input: Min. 100 W
Three-channel
Subwoofer
Nominal input: Min. 170 W
Speaker output B
Other than subwoofer
Max. input: Min. 240 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
If only one input plug is used, do not
connect anything to RCA input jack B.
Input Select Switch
For two-channel input, slide this switch
to the left. For four-channel input, slide
this switch to the right.
Front side
RCA input jack B
RCA output jack
RCA input jack A
Connecting wires with RCA pin
plugs (sold separately).
Back side
× 2
Fuse (25 A)
Speaker terminal
System remote control wire (sold separately)
See the "Connecting the
Connect the male terminal of this wire to the system remote control
Speaker wires" section
terminal of the car stereo (SYSTEM REMOTE CONTROL). The female
for speaker connection
terminal can be connected to the auto-antenna relay control terminal. If the
instructions.
car stereo does not have a system remote control terminal, connect the
male terminal to the power terminal through the ignition switch.
Connecting the Power Terminal
4. Connect the wires to the terminal.
• Fix the wires securely with the terminal
• Always use the special red battery and ground
screws.
wire [RD-223], which is sold separately. Connect
the battery wire directly to the car battery positive
GND terminal
terminal (+) and the ground wire to the car body.
Power terminal
System remote
control terminal
1. Pass the battery wire from the
engine compartment to the interior
of the vehicle.
• After making all other connections to the
amplifier, connect the battery wire terminal of
the amplifier to the positive (+) terminal of
the battery.
Engine
Fuse (30 A)
compart-
Interior of
the vehicle
ment
Battery wire
Fuse (30 A)
Drill a 14 mm
Positive terminal
hole into the
Insert the O-ring rubber
vehicle body.
grommet into the vehicle
body.
2. Twist the battery wire, ground wire
and system remote control wire.
Twist
3. Attach lugs to wire ends. Lugs not
supplied.
• Use pliers, etc., to crimp lugs to wires.
Lug
Ground wire
Lug
Battery wire
Connecting the Speaker Terminals
4. Push on the terminal cover.
1. Expose the end of the speaker wires
by about 10 mm and twist using
nippers or a cutter.
Twist
System remote
10 mm
control wire
Ground wire
2. Attach lugs to speaker wire ends.
Lugs not supplied.
• Use pliers, etc., to crimp lugs to wires.
Lug
Speaker wire
3. Connect the speaker wires to the
speaker terminals.
• You must attach the supplied terminal cover
to the speaker output terminal.
• Connect the speaker wires, passing them
through the terminal cover.
• Fix the speaker wires securely with the termi-
nal screws.
Terminal screw
Terminal cover
Speaker
terminal
Speaker wire
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