STEREO/BRIDGEABLE POWER AMPLIFIER
KAC-6202
INSTRUCTION MANUAL
© B64-3043-00/00 (MV)
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Installation
Self-tapping screw
(ø4 × 16 mm)
330 mm
231 mm
Ø4.6
Installation board, etc.
(thickness : 15 mm or more)
2CAUTION
• Do not install in the below locations;
(Unstable location, In a location that interferes with driving, In a location that gets wet, In a dusty location,
In a place that gets hot, In a place that gets direct sunlight, In a location that gets hit by hot air)
• Do not install the unit under the carpet. Otherwise heat build-up occurs and the unit may be damaged.
• Install this unit in a location which allows heat to easily dissipate.
Once installed, do not place any object on top of the unit.
• The surface temperature of the amplifier will become hot during use. Install the amplifier in a place where
people, resins, and other substances that are sensitive to heat will not come into contact with it.
• When making a hole under a seat, inside the trunk, or somewhere else in the vehicle, check that there
is nothing hazardous on the opposite side such as a gasoline tank, brake pipe, or wiring harness, and be
careful not to cause scratches or other damage.
• Do not install near the dashboard, rear tray, or air bag safety parts.
• The installation to the vehicle should securely fasten the unit to a place in which it will not obstruct
driving. If the unit comes off due to a shock and hits a person or safety part, it may cause injury or an
accident.
• After installing the unit, check to make sure that electrical equipment such as the brake lamps, turn signal
lamps and windshield wipers operate normally.
English 3
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Controls / Indicator
40
3
30
20
10
(W)
1
2
3
4
1 FILTER switch
4 OPERATION switch
This switch allows to apply high-pass or low-pass
filtering to the speaker outputs.
This switch is used to select the operation mode
of the amplifier.
• HPF (High-Pass Filter) position:
The filter outputs the band of higher frequencies
than the frequency set with the FILTER
FREQUENCY control.
• OFF position:
The entire bandwidth is output without filtering.
• LPF (Low-Pass Filter) position:
The filter outputs the band of lower frequencies
than the frequency set with the FILTER
FREQUENCY control.
• 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.)
2 FILTER FREQUENCY control
Sets the cutoff frequency when the FILTER switch
is set to LPF or HPF.
3 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.
4 English
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5
5 Power indicator
■ The protection function is activated in
the following situations:
When the power is turned on, the Power
indicator lights.
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.
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.
• 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.
English 5
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Connection
■ Terminal names
6 7 8 9
0
!
@ #
6 Fuse (25 A)
@ RCA cable ground lead terminal
When using an RCA cable with a ground lead
attached, connect the ground lead to this
terminal.
7 Battery terminal
8 Ground terminal
9 Power control terminal
# Speaker level input terminals
Controls the unit ON/OFF.
NOTE
NOTE
• The genuine-accessory car stereo shall have a
maximum power output of no more than 40 W.
• Do not connect the speaker output leads from
a power amplifier (Optional) to the speaker
level input terminals of this unit, for this may
cause malfunction or damage.
• Do not connect cables and leads to both RCA
cable input jacks and the speaker level input
terminals simultaneously, for this may cause
malfunction or damage.
• Connect the power control lead to a power
supply which can be turned ON/OFF by
the ignition key switch (ACC line). With this
connection, shock noise may be generated
when the power of the genuine-accessory car
stereo is switched ON/OFF.
Controls the unit power. Be sure to connect it
with all the systems.
0 Speaker output terminals
• Stereo Connections:
When you wish to use the unit as a stereo
amplifier, stereo connections are used.
The speakers to be connected should have an
impedance of 2Ω or greater. When multiple
speakers are to be connected, ensure that the
combined impedance is 2Ω or greater for each
channel.
• 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 9 and the RIGHT channel ·
SPEAKER OUTPUT terminals.)
The speakers to be connected should have an
impedance of 4Ω or greater. When multiple
speakers are to be connected, ensure that the
combined impedance is 4Ω or greater.
2CAUTION
The rated input of the speakers should be no
less than the maximum output of the amplifier.
Otherwise malfunction may result.
! LINE IN terminal
6 English
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■ Installation procedure
■ Wiring
Since there are large variety of settings and
connections possible according to applications, read
the instruction manual well to select the proper
setting and connection.
1. Remove the ignition key and disconnect the
negative - terminal of the battery to prevent
short circuits.
2. Set the unit according to the intended usage.
3. Connect the input and output wires of the units.
4. Connect the speaker wires.
5. Connect the power wire, power control wire and
grounding wire following this order.
• Take the battery wire for this unit directly from the
battery. If it's connected to the vehicle’s wiring
harness, it can cause blown fuses etc.
• If a buzzing noise is heard from the speakers when
the engine is running, connect a line noise filter
(optional) to each of the battery wire.
• Do not allow the wire to directly contact the edge
of the iron plate by using Grommets.
• Connect the ground wire to a metal part of the car
chassis that acts as an electrical ground passing
electricity to the battery‘s negative - terminal.
Do not turn the power on if the ground wire is not
connected.
6. Install the unit in the car.
7. Connect the negative - terminal of the battery.
• Be sure to install a protective fuse in the power
cord near the battery. The protective fuse should
be the same capacity as the unit’s fuse capacity or
somewhat larger.
• For the power cord and ground, use a vehicle
type (fireproof ) power wring cord with a current
capacity greater than the unit’s fuse capacity. (Use
a power wiring cord with a diameter of 5 mm²
(AWG 10) or greater.)
• When more than one power amplifier are going
to be used, use a power supply wiring wire
and protective fuse of greater current-handling
capacity than the total maximum current drawn by
each amplifier.
2WARNING
To prevent fire caused by a short in the wiring,
connect a fusible link or breaker nearby the battery’s
positive terminal.
2CAUTION
• If sound is not output normally, immediately turn
power off and check connections.
• Be sure to turn the power off before changing the
setting of any switch.
• If the fuse blows, check wires for shorts, then
replace the fuse with one of the same rating.
• Check that no unconnected wires or connectors
are touching the car body. Do not remove caps
from unconnected wires or connectors to prevent
short circuits.
• Connect the speaker wires to appropriate speaker
connectors separately. Sharing the negative wire
of the speaker or grounding speaker wires to the
metal body of the car can cause this unit to fail.
• After installation, check that the brake lamps,
winkers, and wipers work properly.
■ Speaker Selection
• The rated input power of the speakers that are
going to be connected should be greater than the
maximum output power (in Watts) of the amplifier.
Use of speakers having input power ratings that
are less than the output power of the amplifier will
cause smoke to be emitted as well as damage.
• The impedance of the speakers that are going
to be connected should be 2Ω or greater (for
stereo connections), or 4Ω or greater (for bridged
connections). When more than one set of speakers
are going to be used, calculate the combined
impedance of the speakers and then connect
suitable speakers to the amplifier.
4Ω
4Ω
4Ω
4Ω
2 Ω
8 Ω
Combined impedance
English 7
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Connection
■ RCA cable or Speaker level input connection
(RCA cable Connections)
RCA cable*
!
CENTER UNIT
(CD receiver, etc.)
@
Power control wire
(Blue/ White)
@
GND
Right input
Left input
RCA cable ground terminal
Speaker level input cable
(Speaker level input Connections)
Genuine-accessory car
stereo (No line output
center unit etc.)
Cable Color of the connector
White
Left
White/Black
Gray
Car fuse box
#
Right
Gray/Black
Battery
ACC
8 English
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* Commercially available parts
■ Speaker wire connection
(Stereo Connections)
Left speaker
0
0
Right speaker
Lead terminal*
(Bridged Connections)
Speaker (Bridged)
0
■ Power wire connection
7 8 9
Lead terminal*
Terminal cover
Power control wire
Battery wire*
Ground wire*
Protective Fuse*
Battery
English 9
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System examples
■ 2-channel system
Left speaker
L
L
CENTER UNIT
R
R
Right speaker
4
1
■ High-power 2-channel system
¡
L
L
L
Left speaker (Bridged)
Right speaker (Bridged)
R
R
CENTER UNIT
L
L
R
R
R
™
4
1
¡
™
■ 2-channel + Subwoofer system
¡
Left speaker (High pass)
Right speaker (High pass)
L
L
R
R
CENTER UNIT
L
L
Subwoofer (L + R) (Bridged)
R
R
™
2
2
4
4
1
1
¡
™
10 English
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■ Tri-mode
L
C
C
L
L
Subwoofer
(L + R) (Bridged)
(High pass)
CENTER UNIT
R
R
4
1
●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.
Crossover Frequency
(Low pass)
0 dB
Capacitor (C): Passes high frequencies and blocks low
-3 dB
frequencies. (High pass)
L
C
159000
C=
L=
(µF)
fc x R
159 x R
fc
fc=Cut of Frequency (Hz)
R=Speaker Impedance (Ω)
Frequency
(mH)
●Example:
When it is required to set a crossover frequency of 120 Hz using speakers with an impedance of 4
ohms.
Prepare commercially-available coil and capacitor with the closest ratings to the results calculated from the
formula above. The capacitor rating should be as close as possible to 331.25 (µF) and the coil rating should
be as close as possible to 5.3 (mH).
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.
English 11
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Troubleshooting Guide
What might appear to be a malfunction in your unit may just be the result of slight misoperation or
miswiring. Before calling service, first check the following table for possible problems.
PROBLEM
POSSIBLE CAUSE
SOLUTION
• Connect the input (or output)
cables.
No sound.
• Input (or output) cables are
(No sound from one side.) disconnected.
(Blown fuse.)
• Protection circuit may be activated. • Check connections by referring to
<Protection function>.
• Volume is too high.
• Replace the fuse and use lower
volume.
• The speaker cord is shorted.
• After check the speaker cord and
fixing the cause of the short, replace
the fuse.
The output level is too
small (or too large).
• The input sensitivity adjusting
control is not set to the correct
position.
• Adjust the control correctly referring
to <Controls>.
The sound quality is bad. • The speakers wire are connected
• Connect them properly checking the
+ / - of the terminals and wires
well.
(The sound is distorted.)
with wrong + /-polarity.
• A speaker wire is pinched by a screw • Connect the speaker wire again so
in the car body. that it is not pinched by anything.
• The switches may be set improperly. • Set switches properly by referring to
<System examples>.
12 English
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Specifications
Specifications subject to change without notice.
Audio Section
Max Power Output ...............................................................................................................................................................................................400 W
Rated Power Output
Normal (4 Ω) (20 Hz – 20 kHz, 0.08 % THD)...................................................................................................................................60 W x 2
Normal (2 Ω) (1 kHz, 0.8 % THD)........................................................................................................................................................100 W x 2
Bridged (4 Ω) (1 kHz, 0.8 % THD).......................................................................................................................................................200 W x 1
Frequency Response (+0, –3 dB).............................................................................................................................................. 10 Hz – 45 kHz
Sensitivity (rated output) (MAX.) ..................................................................................................................................................................... 0.2 V
Sensitivity (rated output) (MIN.) ...................................................................................................................................................................... 5.0 V
Signal to Noise Ratio........................................................................................................................................................................................... 100 dB
Input Impedance.....................................................................................................................................................................................................10 kΩ
Low Pass Filter Frequency (12 dB/oct.) ..................................................................................................................50 – 200 Hz (variable)
High Pass Filter Frequency (12 dB/oct.).................................................................................................................50 – 200 Hz (variable)
General
Operating Voltage.................................................................................................................................................. 14.4 V (11 – 16 V allowable)
Current Consumption ............................................................................................................................................................................................25 A
Dimensions (W x H x D).........................................................................................................................................................330 x 59 x 242 mm
Weight............................................................................................................................................................................................................................2.8 kg
English 13
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