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6
Connection Diagram
• This diagram shows connections using external output. Slide the input switch to the left.
• In the case of connecting the external output from a car stereo to an RCA input, use the jack used for full-
range output. This is because the LPF of the amplifier cannot be turned OFF. If this jack cannot be used,
connect the subwoofer output jack to the RCA input.
• When you connect with speaker output, connections defers from the diagram. For details, see the “Using
the Speaker Input” section. In either case, you need to set the input switch. For details, see the “Setting the
Unit” section.
• Always use the special red battery and ground wire ([RD-223] and [RD-222]), which are sold separately.
Connect the battery wire directly to the car battery positive terminal (+) and the ground wire to the car
body. There is the risk of a fuse burning out if only one of these is connected.
Fuse (40 A)
Car stereo with
RCA output jacks
External Output
Connecting wire with RCA
pin plugs (sold separately).
RCA input jack
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
terminal, connect the male terminal to the power terminal through the ignition switch.
Speaker output terminal
See the “Connecting the
Speaker Wires” section for
speaker connection instruc-
tions.
Bass Boost Remote
Control Wire
Bass Boost
Remote Control
6 m
Jack for the bass boost
remote control
Connect this jack and
the bass boost remote
control with the bass
boost remote control
wire.
SYNC OUTPUT/SYNC INPUT jack
See the “Connecting the Speaker Wires”
section for SYNC OUTPUT/SYNC
INPUT jack connection instructions.
Fuse (30 A) × 3
Grommet
Special red battery wire
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)
Connect to metal body or chassis.
[RD-223]
(sold separately)
[RD-222] (sold separately)
