Kenwood Stereo Amplifier KAC X41 User Manual

KAC-X41  
FOUR CHANNEL POWER AMPLIFIER  
INSTRUCTION MANUAL  
© B64-4200-00/00 (MV)  
 
Installation  
Accessories  
Part name  
External View Number of Items  
380 mm  
320 mm  
Self-tapping screws  
(ø5 × 18 mm)  
4
ø6  
Hexagon Wrench (Large)  
Hexagon Wrench (Small)  
1
1
1
Terminal cover (Power terminal)  
Installation procedure  
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. Remove the Dressing cover.  
4. Connect the input and output wires of the units.  
5. Connect the speaker wires.  
6. Connect the power wire, power control wire and grounding wire following  
this order.  
7. Install the installation fittings in the unit.  
8. Attach the unit.  
9. Attach the Dressing cover.  
Hexagon Wrench  
(Small)  
Hexagon socket  
head cap screw  
(M4 × 8 mm)  
10. Connect the negative · terminal of the battery.  
Dressing cover  
CAUTION  
• 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.  
• This unit has cooling fan to decrease the internal temperature. Do not  
mount the unit in a place where the cooling fan and ducts of the unit are  
blocked. Blocking these openings will inhibit the cooling of the internal  
temperature and result in malfunction.  
• 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.  
Cooling fan  
Installation board, etc.  
(thickness : 15 mm or more)  
Self-tapping screw  
(ø5 × 18 mm)  
English ꢁ  
 
Connection  
WARNING  
Remove the ignition key and  
disconnect the negative · terminal of  
the battery to prevent short circuits.  
RCA cable*  
CENTER UNIT  
(CD receiver, etc.)  
NOTE  
Hexagon Wrench  
(Small)  
Use a RCA cable  
with a straight  
terminal. If a RCA  
cable with L type  
terminal is used, it  
may not be able to  
connect.  
Power control wire*  
Use the  
attached  
Hexagon  
Wrench.  
CAUTION  
• If sound is not output normally, immediately  
turn power off and check connections.  
• Be sure to turn the power off before  
Left input  
changing the setting of any switch.  
Hexagon Wrench  
LEFT  
RIGHT  
LEFT  
RIGHT  
BATT.  
GND  
• If the fuse blows, check wires for shorts, then  
(Small)  
L
replace the fuse with one of the same rating.  
R
• 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.  
2]  
PN  
BRED  
SPEAKEOUTPUT  
BRIED  
PEAKER OUTUT  
A
B
+
B
A
B
LINE IN  
LINE OUT  
Right input  
Hexagon  
A channel input  
Wrench (Large)  
B channel input  
Use the  
attached  
Hexagon  
Wrench.  
• After installation, check that the brake  
lamps, winkers, and wipers work properly.  
Battery wire*  
Protective Fuse*  
B channel  
Right speaker  
B channel  
Left speaker  
* Commercially available parts  
A channel  
Terminal cover  
Ground wire*  
Right speaker  
WARNING  
A channel  
Left speaker  
To prevent fire caused by a short in the  
wiring, connect a fusible link or breaker  
nearby the battery’s positive terminal.  
Battery  
LEFT  
RIGHT  
LEFT  
RIGHT  
Bridged Connections  
BRIDGED  
PEAKER OUTUT  
BRIDGED  
PEAKER OUTPUT  
A
B
B channel  
Speaker (Bridged)  
A channel  
Speaker (Bridged)  
About the Lead Terminals  
1. Wire Thicknesses  
You can use wires with the following thicknesses:  
Hexagon  
Wrench  
(Large)  
Battery wire and ground wire  
Speaker wire  
AWG 4 – AWG 6  
AWG 8 – AWG 12  
10 - 13 mm  
(3/8" - 1/2")  
Hexagon Wrench  
(Small)  
2. Strip the wire  
Make a cut in the wire sheath (insulator made from vinyl, etc.) at the  
position 10-13 mm away from the end of the wire, and then remove the  
unnecessary portion of the sheath by twisting it.  
3. Install the wire  
Loosen the screw using the supplied hexagon wrench. Insert the  
conductor of the wire in the terminal hole, and then tighten the screw.  
English  
 
System examples  
ꢂ-channel system  
High-power ꢀ-channel system  
L
L
L
Front Left speaker  
Front Right speaker  
Left speaker (Bridged)  
Right speaker (Bridged)  
L
L
A
B
A
B
CENTER UNIT  
CENTER UNIT  
R
R
R
R
L
L
R
Rear Left speaker  
Rear Right speaker  
L
L
R
R
R
R
6
6
60  
60  
1
70  
1
70  
1
70  
1
70  
100  
100  
100  
100  
4
4
0
10  
15  
10  
15  
70  
80  
70  
80  
50  
50  
2
2
2
2
0.5  
0.3  
0.5  
0.3  
0.5  
0.3  
2
0.5  
0.3  
2
60  
60  
60  
60  
150  
150  
200  
150  
150  
200  
3
4
3
3
3
90  
100  
BASS BOOST  
90  
100  
BASS BOOST  
4
4
4
]
[
]
[
]
50  
200  
[
]
[
]
40  
0
18  
50  
[
]
[
]
50  
200  
[
[
]
40  
18  
50  
MIN  
MAX  
MIN  
MAX  
MIN  
MAX  
MIN  
MAX  
5
0.2  
5
0.2  
5
0.2  
5
0.2  
INPUT  
SENSITIVITY  
HPF/LPF  
INPUT  
BASS BOOST  
LEVEL dB  
HPF/LPF  
FREQUENCY Hz  
INPUT  
SENSITIVITY  
HPF/LPF  
INPUT  
BASS BOOST  
LEVEL dB  
HPF/LPF  
[
[
]
V
[
]
[
]
V
[
]
[
]
[
]
[
]
V
[
]
[
]
V
[
]
[
]
]
FREQUENCY Hz  
FREQUENCY Hz SENSITIVITY  
FREQUENCY Hz  
FREQUENCY Hz SENSITIVITY  
FREQUENCY Hz  
A ch  
B ch  
A ch  
B ch  
INPUT  
A ch  
B ch  
INPUT  
A ch  
B ch  
SELECTOR OPERATION FILTER  
FILTER  
SELECTOR OPERATION FILTER  
FILTER  
A
MONO  
HPF  
LPF  
HPF  
A
MONO  
HPF  
LPF  
HPF  
[
]
[
]
Lch  
Lch  
OFF  
OFF  
OFF  
OFF  
A
B
A
B
STEREO  
LPF  
STEREO  
LPF  
ꢀ-channel + Subwoofer system (1)  
ꢀ-channel + Subwoofer system (ꢀ)  
Left speaker (High pass)  
Right speaker (High pass)  
L
L
L
L
Left speaker (High pass)  
Right speaker (High pass)  
A
B
A
B
CENTER UNIT  
CENTER UNIT  
R
R
R
R
L
L
L
L
Subwoofer  
(Bridged)  
Subwoofer  
(Bridged)  
R
R
R
R
6
6
60  
60  
1
70  
1
70  
1
70  
1
70  
100  
100  
100  
100  
4
0
4
0
10  
15  
10  
15  
70  
80  
70  
80  
50  
50  
2
2
2
2
0.5  
0.3  
0.5  
0.3  
0.5  
0.3  
2
0.5  
0.3  
2
60  
60  
60  
60  
150  
150  
200  
150  
150  
200  
3
4
3
3
4
3
90  
100  
BASS BOOST  
90  
100  
BASS BOOST  
4
4
[
]
[
]
50  
200  
[
]
[
]
40  
18  
50  
[
]
[
]
50  
200  
[
]
[
]
40  
18  
50  
MIN  
MAX  
MIN  
MAX  
MIN  
MAX  
MIN  
MAX  
5
0.2  
5
0.2  
5
0.2  
5
0.2  
INPUT  
SENSITIVITY  
HPF/LPF  
INPUT  
BASS BOOST  
LEVEL dB  
HPF/LPF  
FREQUENCY Hz  
INPUT  
SENSITIVITY  
HPF/LPF  
INPUT  
BASS BOOST  
LEVEL dB  
HPF/LPF  
[
[
]
V
[
]
[
]
V
[
]
[
]
[
]
[
]
V
[
]
[
]
V
[
]
[
]
]
FREQUENCY Hz  
FREQUENCY Hz SENSITIVITY  
FREQUENCY Hz  
FREQUENCY Hz SENSITIVITY  
FREQUENCY Hz  
A ch  
B ch  
A ch  
B ch  
INPUT  
A ch  
B ch  
INPUT  
A ch  
B ch  
SELECTOR OPERATION FILTER  
FILTER  
SELECTOR OPERATION FILTER  
FILTER  
A
MONO  
HPF  
LPF  
HPF  
A
MONO  
HPF  
LPF  
HPF  
[
]
[
]
Lch  
Lch  
OFF  
OFF  
OFF  
OFF  
A
B
A
B
STEREO  
LPF  
STEREO  
LPF  
English ꢃ  
 
Controls  
Z
6
60  
1
70  
1
70  
50  
100  
100  
4
10  
15  
70  
80  
50  
2
2
0.5  
0.5  
0.3  
2
60  
60  
150  
150  
200  
3
3
90  
100  
BASS BOOST  
0.3  
4
4
]
[
]
[
]
50  
200  
[
[
]
40  
0
18  
MIN  
5
0.2 MAX  
MIN  
5
0.2 MAX  
INPUT  
SENSITIVITY  
HPF/LPF  
INPUT  
BASS BOOST  
LEVEL dB  
HPF/LPF  
[
[
]
V
[
]
[
]
V
[
]
[
]
]
FREQUENCY Hz SENSITIVITY  
FREQUENCY Hz  
FREQUENCY Hz  
A
ch  
B
ch  
INPUT  
A
ch  
B
ch  
SELECTOR OPERATION FILTER  
FILTER  
HPF  
A
MONO  
HPF  
[
]
Lch  
OFF  
OFF  
A
B
STEREO  
LPF  
LPF  
ꢍ ꢎ  
NOTE  
The control panel locates under the front side cover. Remove  
the cover to access to its controls for adjustment. (See page 3)  
THERMAL MANAGEMENT  
PROTECTION  
LEFT  
RIGHT  
LEFT  
RIGHT  
BATT.  
GND  
L
R
[
x ]  
2
BRIDGED  
SPEAKER OUTPUT  
BRIDGED  
SPEAKER OUTPUT  
A
B
A
+
B
FUSE 40A  
P.CON  
LINE IN  
LINE OUT  
A
B
This is a 4 channel amplifier including 2 stereo  
amplifiers in a body. One amplifier is referred  
to as amplifier A and the other is amplifier B.  
This unit is compatible with a large variety of  
systems by combining the switches and functions  
described in the following.  
They always output the stereo signals regardless  
of the position of the "OPERATION" switch.  
# OPERATION switch  
The amplification methods of the signals input  
can be selected.  
8 THERMAL MANAGEMENT indicator  
Lights this indicator when the internal  
temperature is high.  
• STEREO position:  
The amplifier can be used as a stereo amplifier.  
• MONO (Lch) position:  
9 PROTECTION indicator  
1 Fuse (ꢂ0 A x ꢀ)  
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.)  
Lights this indicator when the protection function  
is activated. (See page 2)  
NOTE  
If you can’t find the specified capacity fuse at your  
store etc., consult your Kenwood dealer.  
0 Power indicator  
When the power is turned on, the Power indicator  
lights.  
$ FILTER switch (A.ch/B.ch)  
2 Battery terminal  
This switch allows to apply high-pass or low-pass  
filtering to the speaker outputs.  
- INPUT SENSITIVITY control (A.ch/B.ch)  
Set this control according to the pre-output level  
of the center unit connected with this unit.  
The sensitivities of amplifiers A and B can be  
adjusted independently regardless of the position  
of the input selector switch.  
3 Power control terminal  
Controls the unit ON/OFF.  
• HPF (High-Pass Filter) position:  
The filter outputs the band of higher frequencies  
than the frequency set with the "HPF  
FREQUENCY" control.  
NOTE  
Controls the unit power. Be sure to connect it with  
all the systems.  
• OFF position:  
4 Ground terminal  
NOTE  
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 "LPF  
FREQUENCY" control.  
The speaker output is automatically switched to  
monaural (L+R).  
5 Speaker output terminals (A.ch/B.ch)  
For the pre-output level, refer to the  
<Specifications> in the instruction manual of the  
center unit.  
• 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.  
= HPF/LPF FREQUENCY control (A.ch/  
B.ch)  
Sets the cutoff frequency when the "FILTER"  
switch is set to "HPF" or "LPF".  
~ BASS BOOST FREQUENCY control (B.ch)  
Sets the center frequency around which the low  
frequency range should be boosted.  
• 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.)  
! BASS BOOST LEVEL control (B.ch)  
Sets the level by which the low frequency range  
should be boosted.  
@ INPUT SELECTOR switch  
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.  
This switch selects the input method of the  
signals to be amplified by amplifiers A and B.  
• A B position:  
Amplifies both of the signals input to amplifiers  
A and B.  
6 LINE IN terminal (A.ch/B.ch)  
• A position:  
7 LINE OUT terminal  
Amplifies only signal input amplifier A with both  
amplifiers A and B.  
These jacks output respectively the signals input  
to amplifiers A and B.  
English  
 
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  
No sound.  
(Blown fuse.)  
POSSIBLE CAUSE  
SOLUTION  
• Input (or output) cables are disconnected.  
• Protection circuit may be activated.  
• Volume is too high.  
• Connect the input (or output) cables.  
• Check connections by referring to <Protection function>.  
• Replace the fuse and use lower volume.  
• After check the speaker cord and fixing the cause of the short,  
replace the fuse.  
• The speaker cord is shorted.  
The output level is too small • The input sensitivity adjusting control is not set to the correct • Adjust the control correctly referring to <Controls>.  
(or too large).  
The sound quality is bad.  
(The sound is distorted.)  
position.  
• The speakers wire are connected with wrong ª / · polarity. • Connect them properly checking the ª / · of the terminals  
and wires well.  
• A speaker wire is pinched by a screw in the car body.  
• The switches may be set improperly.  
• Connect the speaker wire again so that it is not pinched by  
anything.  
• Set switches properly by referring to <Controls>.  
Specifications  
Specifications subject to change without notice.  
Audio Section  
Max Power Output.........................................................................................................................................................................................................................................1200 W  
Rated Power Output (+B = 14.4 V)  
Normal (4 Ω) (20 Hz – 20 kHz, 0.05 % THD).................................................................................................................................................................100 W × 4  
(2 Ω) (1 kHz, 0.5 % THD)........................................................................................................................................................................................150 W × 4  
Bridged (4 Ω) (1 kHz, 0.5 % THD).......................................................................................................................................................................................300 W × 2  
Frequency Response (+0, –3 dB)..............................................................................................................................................................................................5 Hz – 50 kHz  
Sensitivity (rated output) (MAX.) .................................................................................................................................................................................................................0.2 V  
Sensitivity (rated output) (MIN.) ..................................................................................................................................................................................................................5.0 V  
Input Impedance............................................................................................................................................................................................................................................... 10 kΩ  
Signal to Noise Ratio......................................................................................................................................................................................................................................105 dB  
Low Pass Filter Frequency (-12 dB/oct.)...............................................................................................................................................................50 – 200 Hz (variable)  
High Pass Filter Frequency (-12 dB/oct.) .............................................................................................................................................................50 – 200 Hz (variable)  
Bass Boost Level (B channel)........................................................................................................................................................................................0 – +18 dB (variable)  
Bass Boost Frequency (B channel)..........................................................................................................................................................................40 – 100 Hz (variable)  
Bass Boost Frequency...................................................................................................................................................................................................................................................  
General  
Operating Voltage .............................................................................................................................................................................................. 14.4 V (11 – 16 V allowable)  
Current Consumption ........................................................................................................................................................................................................................................64 A  
Installation Size (W × H × D) .........................................................................................................................................................................................380 × 66 × 286 mm  
Weight .....................................................................................................................................................................................................................................................................4.9 kg  
Weight ..................................................................................................................................................................................................................................................................................  
English ꢅ  
 
 

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