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Connection Diagram
CAUTION:
To prevent damage and/or injury
• Do not ground the speaker wire directly or con-
nect a negative (–) lead wire for several speakers.
• This unit is for vehicles with a 12-volt battery and
negative grounding. Before installing it in a recre-
ational vehicle, truck or bus, check the battery
voltage.
• If the car stereo is kept on for a long time while
the engine is at rest or idling, the battery may go
dead. Turn the car stereo off when the engine is at
rest or idling.
• If the system remote control wire of the amplifier
is connected to the power terminal through the
ignition switch (12 V DC), 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 the engine is at
rest or idling.
• Speakers to be connected to the amplifier should
conform with the standards listed below. If they
do not conform, they may catch fire, emit smoke
or become damaged. The speaker impedance must
be 2 Ω to 8 Ω. But in case of two-channel and
other bridge connections, the speaker impedance
must be 4 Ω to 8 Ω.
• Install and route the separately sold battery wire
as far away as possible from the speaker wires.
Install and route the separately sold battery wire,
ground wire, speaker wires and the amplifier as
far away as possible from the antenna, antenna
cable and tuner.
• Cords for this product and those for other prod-
ucts may be different colors even if they have the
same function. When connecting this product to
another product, refer to the supplied manuals of
both products and connect cords that have the
same function.
Connecting the Unit
ENGLISH
CAUTION
• Disconnect 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 it 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 mov-
ing parts of the vehicle, such as the gearshift,
handbrake or seat sliding mechanism.
• Do not shorten any wires. Otherwise the protec-
tion 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.
• Never replace the fuse with one of greater value
or rating than the original fuse. Use of an improp-
er fuse could result in overheating and smoke and
could cause damage to the product and injury
including burns.
Fuse (30 A)
Grommet
Special red battery wire [RD-223] (sold separately)
After making all other connections at the amplifier,
connect the battery wire terminal of the amplifier to
the positive (+) terminal of the battery.
Ground wire (black) [RD-223] (sold separately)
Connect to metal body or chassis.
Fuse (40 A)
Car stereo with
RCA output jacks
Connecting wire with RCA
pin plugs (sold separately).
RCA input jack B
Speaker output terminal
See the “Connecting the
Speakers and Input Wires”
section for speaker
connection instructions.
System remote control wire (sold separately)
Connect the male terminal of this wire to the system remote control
terminal of the car stereo (SYSTEM REMOTE CONTROL). The
female terminal can be connected to the auto-antenna relay control
terminal. If the car stereo does not have a system remote control ter-
minal, connect the male terminal to the power terminal through the
ignition switch.
Setting the Unit
ENGLISH
Gain Control
Adjusting the gain controls A
and B will help match the out-
put of the car stereo to the
Pioneer amplifier. Normally,
set the gain controls to the
NORMAL position. If the out-
put is low, even when the vol-
ume of the car stereo is turned
up, turn these controls clock-
wise. If there is distortion
when the volume of the car
stereo is turned up, turn these
controls counter-clockwise.
• If you only use one input plug, set
the gain controls for speaker out-
puts A and B to the same position.
• When using with an RCA
equipped car stereo (standard
output of 500 mV), set to the
NORMAL position. When
using with an RCA equipped
Pioneer car stereo with max.
output of 4 V or more, adjust
level to match the car stereo
output level.
Power Indicator
The power indicator
lights when the power is
switched on.
Fuse (30 A)
Front side
Connecting the Power Terminal
• Always use the special red battery and ground
wire [RD-223], which is sold separately. Connect
the battery wire directly to the car battery positive
terminal (+) and the ground wire to the car body.
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.
2. Twist the battery wire, ground wire
and system remote control wire.
3. Attach lugs to wire ends. Lugs not
supplied.
• Use pliers, etc., to crimp lugs to wires.
4. Connect the wires to the terminal.
• Fix the wires securely with the terminal
screws.
WARNING
Failure to securely fasten the battery wire to the ter-
minal using the terminal screws could cause the ter-
minal area to overheat and could result in damage
and injury including minor burns.
Connecting the Speaker Output
Terminals
1. Expose the end of the speaker wires
using nippers or a cutter by about
10 mm (3/8 inch) and twist.
2. Attach lugs to speaker wire ends.
Lugs not supplied.
• Use pliers, etc., to crimp lugs to wires.
3. Connect the speaker wires to the
speaker output terminals.
• Fix the speaker wires securely with the termi-
nal screws.
Fuse (30 A)
Engine
compart-
ment
Interior of
the vehicle
Drill a 14 mm
(1/2 inch) hole
into the vehicle
body.
Insert the O-ring rubber
grommet into the vehicle
body.
Positive terminal
GND terminal
Power terminal
Battery wire
System remote
control terminal
System remote
control wire
Ground wire
Speaker
output
terminal
Terminal screw
Fuse (30 A)
Speaker wire
Input Select Switch
For two-channel input, slide
this switch to the left. For four-
channel input, slide this switch
to the right.
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows according to the type of speaker that is connected
to the speaker output connector and the car stereo system:
LPF/HPF Select Audio frequency range Speaker Remarks
Switch to be output Type
LPF (Left) 80 Hz and below with Subwoofer Connect a subwoofer.
–12 dB/oct. cut off slope
OFF (Center) Full range Full range
HPF (Right) 80 Hz and above with Full range Use if you want to cut the
–12 dB/oct. cut off slope very low frequency range
because it is not necessary
for the speakers you are
using.
Speaker Channel Speaker Type Power
Four-channel
Subwoofer Nominal input: Min. 45 W
Other than subwoofer Max. input: Min. 80 W
Two-channel
Subwoofer Nominal input: Min. 120 W
Other than subwoofer Max. input: Min. 200 W
Three-channel Subwoofer Nominal input: Min. 45 W
Speaker output A Other than subwoofer Max. input: Min. 80 W
Three-channel Subwoofer Nominal input: Min. 120 W
Speaker output B Other than subwoofer Max. input: Min. 200 W
Amplifier with
RCA input jacks
External Output
If only one input plug is used,
do not connect anything to
RCA input jack B.
RCA input
Input Select Switch
For two-channel input, slide this
switch to the left. For four-channel
input, slide this switch to the right.
Speaker input terminal
See the “Using the Speaker Input”
section.
Back side
RCA input jack A
Connecting wire with RCA pin
plugs (sold separately).
RCA output jack
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
standard tip screwdriver.