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Controls
POWER IN
GND
FUSE(40A)
BATT.
P.CON(REMOTE)
KAC-829
KAC-729S
1
2 34
POWER IN
GND
BRIDGED
FUSE(25A)
BATT.
P.CON(REMOTE)
LEFT
KAC-629S
KAC-529S
1 234
5
Operations of the following control and switches
are required in accordance with the center unit
and speakers connected with this unit.
1 Fuse
40 A × 1 : KAC-829/729S
25 A × 1 : KAC-629S
15 A × 1 : KAC-529S
NOTE
If you can't find the specified capacity fuse at your
store etc., consult your Kenwood dealer.
2 Battery terminal
3 Ground terminal
4 Power control (REMOTE) terminal
5 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.)
System examples
■ 2-channel system
Left speaker
CENTER
L
L
UNIT
Right speaker
R
R
KAC-829/729S/529S
KAC-629S
7
8
7
8
OPERATION
OPERATION
FILTER
FILTER
L+R
OFF
LPF
STEREO
MONO(Lch)
OFF
STEREO
MONO(Lch)
HPF
LPF
■ Subwoofer system
CENTER
Left speaker
UNIT
Right speaker
L
L
Subwoofer
R
R
KAC-829/729S/529S
KAC-629S
8
7
8
7
OPERATION
OPERATION
FILTER
FILTER
OFF
L+R
OFF
LPF
STEREO
MONO(Lch)
HPF
LPF
STEREO
MONO(Lch)
■ 1-channel system
L
L
L
Left speaker
CENTER
R
R
UNIT
L
L
R
Right speaker
R
R
KAC-829/729S/529S
KAC-629S
8
7
8
7
OPERATION
OPERATION
FILTER
FILTER
OFF
L+R
OFF
LPF
STEREO
MONO(Lch)
HPF
LPF
STEREO
MONO(Lch)
■ Tri-mode
L
High pass
C
L
L
CENTER
UNIT
R
R
C
KAC-829/729S/529S
KAC-629S
8
7
7
8
OPERATION
FILTER
OPERATION
FILTER
OFF
L+R
OFF
LPF
STEREO
MONO(Lch)
HPF
LPF
STEREO
MONO(Lch)
Principle of Tri-mode
Method of frequency band division using a coil
and capacitor
...
in case of 6dB/oct. slope
Coil (L): Passes low frequencies and blocks
high frequencies. (Low pass)
Capacitor (C): Passes high frequencies and
blocks low frequencies. (High pass)
Example:
When it is required to set a crossover
frequency of 120 Hz using speakers with an
impedance of 4 ohms.
fc=Cut of Frequency (Hz)
R=Speaker Impedance (Ω)
BRIDGED
FILTER
OPERATION
LEFT
RIGHT
OFF
LPF
STEREO
SPEAKER OUTPUT
GND
POWER AMPLIFIER
5
6
7
89
FILTER
OPERATION
OFF
L
RIGHT
HPF
LPF
STEREO
SPEAKER OUTPUT
GND
POWER AMPLIFIER
6 7
89
6 RCA cable ground lead terminal
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.
7 FILTER switch
These switches allow filtering of the speaker
output signals.
• HPF (High Pass Filter) position (KAC-
629S only)
Only frequencies of 150 Hz or higher are output.
(Frequencies below 150 Hz are cut.)
• LPF (Low Pass Filter) position
Only frequencies of 80 Hz or lower are output.
(Frequencies above 80 Hz are cut.)
The Lch and Rch will be mixed before output
even if the operation switch is set to STEREO.
• OFF position
The original sound without filtering is output.
8 OPERATION switch
This switch allows selection of the amplification
method of input signals.
Connection
NOTE
■ RCA cable connection
CENTER UNIT (Cassette receiver,
CD receiver, etc.)
6
■ Speaker stereo connection
Lead terminal*
5
Crossover Frequency
0 dB
Subwoofer
-3 dB
(L + R)
L
159000
159000
C=
(µF)
=
fc x R
120Hz x 4Ω
159 x R
159 x 4Ω
L=
(mH)
=
fc
120Hz
2CAUTION
• If you wish to bridge-connect a speaker, the
speaker impedance must be no less than 4
ohms. Connecting a speaker with an
impedance lower than 4 ohms may damage
the unit.
• Be sure to connect capacitors to speakers to
which high frequencies will be passed.
Failure to do so will result in a drop of the
combined impedance with the subwoofer.
• Ensure that the withstand voltage and
current ratings of the capacitors (C) and coils
(L) are sufficient.
KAC-829
SPEAKER LEVEL INPUT
LEFT
RIGHT
MONO(Lch)
LINE IN
KAC-729S
0.5
0.3
L
R
1.0
KAC-529S
MIN
MAX
INPUT
SENSITIVITY(V)
0
!
SPEAKER LEVEL INPUT
+
R
LEFT
RIGHT
LINE IN
MONO(Lch)
0.5
0.3
L
R
1.0
KAC-629S
MIN
MAX
INPUT
SENSITIVITY(V)
0
!
• STEREO position
The amplifier can be used as a stereo amplifier.
• L+R position (KAC-629S only)
The input left and right signals are combined
before being amplified. Use this position when
the unit is used for subwoofer speakers or the
L+R (monaural) sound is required.
• 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.)
9 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.
NOTE
For the pre-output level or the maximum power
output, refer to the "Specifications" in the
instruction manual of the center unit.
0 LINE IN terminal
! Speaker level input terminals
For safe installation, read "Installation procedure" before starting work.
RCA cable*
SPEAKER LEVEL INPUT
FILTER
OPERATION
OFF
LPF
STEREO
MONO(Lch)
LINE IN
0.5
0.3
L
R
GND
1.0
MIN
MAX
INPUT
SENSITIVITY(V)
Power control wire*
4
POWER IN
GND
BRIDGED
BATT.
P.CON(REMOTE)
LEFT
H T
R IG
E D
ID G
B R
F T
L E
Left speaker
■ Power wire connection
C
Frequency
= 331.25 µF
= 5.3 mH
Battery wire*
Protective Fuse*
9
0.5
0.3
10
1.0
15
20
MIN
MAX
(W)
INPUT
SENSITIVITY(V)
MAXIMUM POWER
25W or greater
KAC-829
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
■ Speaker level input connection
Genuine-accessory car stereo (No
line output center unit etc.)
Car fuse box
Battery
LEFT
RIGHT
!
T
P U
IN
H T
L
V E
R IG
L E
E R
K
E A
F T
S P
L E
■ Speaker bridge connection
Lead terminal*
RIGHT
SPEAKER OUTPUT
5
H T
R IG
E D
ID G
POWER AMPLIFIER
B R
F T
L E
Right speaker
POWER IN
GND
BRIDGED
BATT.
P.CON(REMOTE)
LEFT
RIGHT
SPEAKER OUTPUT
POWER AMPLIFIER
2
3
4
Lead terminal*
Terminal cover
Power control wire*
Ground wire*
Battery
STEREO/BRIDGEABLE
AMPLIFIER
STEREO/BRIDGEABLE
AMPLIFIER
KAC-829
KAC-729S
Power indicator
KAC-629S
KAC-529S
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
sent to the speaker output.
• When the internal temperature is high and unit
won't operate.
• When a ground wire of the center unit (cassette
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.
*...Commercially available parts
Speaker
ACC
SPEAKER LEVEL INPUT
FILTER
OPERATION
LEFT
RIGHT
OFF
LPF
STEREO
MONO(Lch)
LINE IN
0.5
0.3
L
R
GND
1.0
MIN
MAX
INPUT
SENSITIVITY(V)
4
POWER IN
GND
BRIDGED
BATT.
P.CON(REMOTE)
LEFT
RIGHT
SPEAKER OUTPUT
POWER AMPLIFIER
Subwoofer
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