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Controls
A
B
5
1
2 3 4
The unit is a 5-channel amplifier incorporating 2
stereo amplifiers and 1 monaural amplifier in a
single body.
The stereo amplifier on one side is called amplifier
A, while the one on the other side is amplifier B.
The monaural amplifier is called the amplifier SUB.
This unit is compatible with a large variety of
systems by combining the switches and functions
described in the following.
1 Fuse (25 A ´ 2)
2 Power control terminal
3 Battery terminal
4 Ground terminal
5 Amplifier A/B speaker output
terminals
• Stereo Connections:
When you wish to use the unit as a stereo
amplifier, stereo connections are used.
• Bridged Connections:
When you wish to use the unit as a high-
output monaural amplifier, bridged
connections are used. (Make connections to
the LEFT channel (+) and the RIGHT channel
(-) SPEAKER OUTPUT terminals.)
6 Amplifier SUB speaker output
terminal
As this unit accepts speakers with a minimum
impedance of 2 ohms, connect speakers with
2-ohm or higher impedance to these terminals.
7 Speaker level input terminals
A center unit with no RCA output can still be
System examples
5-channel system
L
CENTER
A
R
UNIT
L
B
9
A
B SUB
R
%
L
A
A
B
INPUT
$
SUB
SELECTOR
INPUT SELECTOR
R
N-F
L
CENTER
A
R
UNIT
L
B
9
A
B SUB
R
%
L
A
A
B
INPUT
SUB
$
SELECTOR
INPUT SELECTOR
R
L
CENTER
A
R
UNIT
L
B
9
A
B SUB
R
%
L
A
A
B
INPUT
SUB
$
SELECTOR
INPUT SELECTOR
R
3-channel system
L
L
A
CENTER
R
UNIT
L
R
B
9
A
B SUB
R
%
L
A
A
B
INPUT
SUB
$
SELECTOR
INPUT SELECTOR
R
N-F
L
L
A
CENTER
R
UNIT
L
R
B
9
A
B SUB
R
%
L
A
A
B
INPUT
SUB
$
SELECTOR
INPUT SELECTOR
R
SPEAKER LEVEL INPUT
A
1
2
A
3
B
B
4
L
R
(MIN)5
A.CH INPUT
SENSITIVITY(V)
150Hz
150Hz
6
7
80Hz
OFF
80Hz
OFF
A
A
B
INPUT SELECTOR
8
9
connected to the speaker output.
Again, even without a power control signal, the
power is switched ON/OFF automatically by
the speaker signal.
8 HPF(High-Pass Filter) switch
When this switch is set to 80 Hz or 150 Hz,
frequencies below the setting value will be cut.
9 INPUT SELECTOR (A/AB) switch
This switch toggles the input signal of amplifier
B.
• A position:
The input for terminal A is output from
amplifiers A and B.
• AB position:
The input for terminal A is output from amplifier
A, while the input for terminal B is output from
amplifier B.
0 INPUT SENSITIVITY control
Set this control according to the pre-output
level of the center unit connected with this
unit, or to the maximum power output of the
genuine-accessory car stereo.
Use the diagram on the right as a guide.
The sensitivities of amplifiers A, B and SUB can
be adjusted independently regardless of the
position of the input selector switch.
NOTE
For the pre-output level or the maximum power
output, refer to the "Specifications" in the
instruction manual of the center unit.
! RCA cable ground lead terminal
Connection
NOTE
RCA cable connection
L
Front left speaker
CENTER UNIT (Cassette receiver,
A
R
Front right speaker
CD receiver, etc.)
L
Rear left speaker
B
R
Rear right speaker
SUB
Subwoofer
150Hz
150Hz
80Hz
OFF
8
80Hz
OFF
150
100
80
170
70
50
200
!
SUB.CH LPF
#
FREQUENCY(Hz)
Speaker stereo connection
Left speaker
A
Right speaker
B
Lead terminal*
SUB
Subwoofer
BRIDGED
A
150Hz
150Hz
80Hz
OFF
80Hz
OFF
8
B
150
100
5
80
170
ID G
70
B R
F T
L E
50
200
SUB.CH LPF
#
FREQUENCY(Hz)
Power wire connection
L
1
1
100
150
0.5
0.5
0.5
80
2
2
170
3
3
70
150Hz
150Hz
0.3
0.3
0.3
80Hz
OFF
80Hz
OFF
4
R
4
A
B
SUB
50
200
0.2(MAX)
(MIN)5
0.2(MAX)
(MIN)5
0.2(MAX)
B.CH INPUT
SUB.CH INPUT
SUB.CH LPF
SENSITIVITY(V)
SENSITIVITY(V)
FREQUENCY(Hz)
A
A
B
A
B
SUB
INPUT
INPUT SELECTOR
SELECTOR
!
@
#
0
When using an RCA cable with a ground lead
attached, connect the ground lead to this terminal.
2CAUTION
Do not use this terminal for power source
grounding. This unit will be damaged if the power
source grounding wire is connected to this
terminal.
@ Amplifier A/B/SUB LINE IN terminal
# SUB.CH LPF(Low-Pass Filter)
FREQUENCY control
This control adjusts the frequency band output
from this SUB channel.
$ OPERATION switch
This switch is used to select the operation
mode of the amplifier.
• STEREO position:
The amplifier can be used as a stereo amplifier.
• MONO (Lch) position:
Amplifies the signal input from the left side
only. Set to this position and make bridged
connections to use as a high-power monaural
amplifier. (The input right signal is not output.)
% INPUT SELECTOR (AB/SUB) switch
This switch toggles the input signal of amplifier
SUB.
• AB position:
The input for terminals A and B input is mixed
and output from amplifier SUB.
NOTE
The input signal varies according to the setting
For safe installation, read "Installation procedure" before starting work.
A
L
R
B
L
1
1
1
2
0.5
2
0.5
2
0.5
3
3
3
0.3
150Hz
150Hz
0.3
0.3
4
R
80Hz
OFF
80Hz
OFF
4
4
(MIN)5
(MIN)5
0.2(MAX)
0.2(MAX)
0.2(MAX)
(MIN)5
A.CH INPUT
B.CH INPUT
SUB.CH INPUT
SENSITIVITY(V)
SENSITIVITY(V)
SENSITIVITY(V)
A
A
B
A
B
SUB
INPUT SELECTOR
Power control wire*
A
L
A
2
A
B
L
R
SUB
B
S U
6
H T
R IG
E D
B
L
B
A
B
2
3
4
Lead terminal*
Terminal cover
Power control wire*
Battery wire*
Ground wire*
Protective Fuse*
Battery
0
40
1
25
0.5
2
5/4/3 CHANNEL
15
POWER AMPLIFIER
3
0.3
4
10
(W)
0.2(MAX)
(MIN)5
A
B
SUB
INPUT
SENSITIVITY(V)
INPUT
SELECTOR
$
%
Power indicator
• SUB position:
Power indicator
When the power is turned on, the Power indicator
lights.
If the Power indicator does not light when the power
is turned on, the protection function may be
activated. Check whether there is any indication of
trouble.
The protection function is activated
in the following situations:
This unit is equipped with a protection function for
protecting this unit and your speakers from various
accidents or problems that can occur.
When the protection function is triggered, the
Power indicator goes off and the amplifier stops
operating.
• When a speaker wire may be short-circuited.
• When a speaker output contacts ground.
• When the unit malfunctions and a DC signal is
• When the internal temperature is high and unit
• When a ground wire of the center unit (cassette
Speaker level input connection
Genuine-accessory car stereo (No
line output center unit etc.)
L
L
R
RCA cable*
A
R
SUB
7
T
P U
IN
H T
L
V E
R IG
L E
E R
K
E A
F T
S P
L E
100
150
80
170
70
5/4/3 CHANNEL
A
B
SUB
POWER AMPLIFIER
50
200
SUB.CH LPF
FREQUENCY(Hz)
INPUT
SELECTOR
Speaker bridge connection
R
SUB
2
Lead terminal*
BRIDGED
SPEAKER LEVEL INPUT
A
A
B
A
B
B
L
R
L
R
SUB
B
S U
5
6
H T
R IG
E D
ID G
B R
F T
L E
R
Description of markings in the figure.
A
/ L
Left
SPEAKER LEVEL INPUT
A
L
Front left
A
A
B
B
L
R
A
R
Front right
/ R
B
Right
B
L
Rear left
Rear right
B
R
SUB
Subwoofer
Front
F
Rear
R
Non-fader
N-F
Commercially available
*
parts
MAXIMUM POWER
of the INPUT SELECTOR (A/AB) switch and the
OPERATION switch.
The input for the SUB terminal is output by
amplifier SUB.
sent to the speaker output.
won't operate.
receiver, CD receiver, etc.) or this unit is not
connected to a metal part serving as an electrical
ground passing electricity to the battery's
negative - terminal.
L
R
B
SPEAKER LEVEL INPUT
A
A
A
B
B
B
L
R
ACC
Battery
Car fuse box
A
SUB
Bridge
SPEAKER LEVEL INPUT
A
A
A
B
B
B
L
R
B
Bridge
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