Kenwood Car Stereo System KAC8101D User Manual

SUBWOOFER POWER AMPLIFIER  
KAC-8101D  
INSTRUCTION MANUAL  
© B64-3416-00/00 (MV)  
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Installation  
Self-tapping screw  
(ø4 × 16 mm)  
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  
(W)  
40  
20  
10  
1
2
3
4
5
1 EXPANDER switch  
5 INPUT SENSITIVITY control  
When this switch is turned ON the dynamic  
range is increased.  
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.  
2 LPF (Low-Pass Filter) FREQUENCY control  
This control adjusts the frequency band output  
from this unit.  
Use the diagram on the right as a guide.  
NOTE  
3 INFRASONIC switch  
For the pre-output level or the maximum power  
output, refer to the <Specifications> in the  
instruction manual of the center unit.  
Ultralow frequencies that cannot be reproduced  
even by a subwoofer speaker do not become  
sound but become unnecessary oscillations,  
which affect the sound by causing distortion, etc.  
Setting this switch to "15 Hz" or "25 Hz" cuts the  
frequencies below the respective frequency.  
This improves the reproduction performance  
of the speakers by eliminating unnecessary  
oscillations which will not become sound.  
4 BASS BOOST switch  
Sets the boost level for bass control.  
• 12dB position:  
BASS BOOST is +12 dB.  
• OFF position:  
BASS BOOST is OFF.  
4 English  
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6
6 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.  
• 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.  
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 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  
7
8
9 0  
!
@
# $  
%
7 Fuse (40 A)  
% Speaker level input terminals  
NOTE  
NOTE  
If you can’t find the specified capacity fuse at your  
store etc., consult your Kenwood dealer.  
• 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.  
8 Battery terminal  
9 Ground terminal  
0 Power control terminal  
Controls the unit ON/OFF.  
NOTE  
Controls the unit power. Be sure to connect it  
with all the systems.  
! Speaker output terminals  
As this unit accepts speakers with a minimum  
impedance of 1 ohm, connect speakers with 1-  
ohm or higher impedance to these terminals.  
2CAUTION  
The rated input of the speakers should be no  
less than the maximum output of the amplifier.  
Otherwise malfunction may result.  
@ RCA cable ground lead terminal  
When using an RCA cable with a ground lead  
attached, connect the ground lead to this  
terminal.  
# LINE IN terminal  
$ LINE OUT terminal  
The signal that’s input from the line input  
terminal is output.  
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.  
• 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.  
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.  
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.  
• Use speakers that have an impedance of 1Ω or  
greater. 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 ground terminal  
#
RCA cable*  
GND  
#
$
CENTER UNIT  
(CD receiver, etc.)  
Right input  
Left input  
Power control wire  
(Blue/ White)  
(Speaker level input Connections)  
Cable Color of the connector  
Genuine-accessory car  
stereo (No line output  
center unit etc.)  
White  
Left  
White/Black  
Gray  
Right  
Car fuse box  
Gray/Black  
%
Battery  
ACC  
8 English  
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* Commercially available parts  
Speaker wire connection  
Lead terminal*  
!
!
Subwoofer (L + R)  
Power wire connection  
8
9
0
Lead terminal*  
Terminal cover  
Extension wire*  
Battery wire*  
Ground wire*  
Protective Fuse*  
Battery  
English 9  
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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  
No sound.  
(No sound from one side.)  
(Blown fuse.)  
• Input (or output) cables are  
disconnected.  
• Protection circuit may be activated. • Check connections by referring to  
<Indicator>.  
• Connect the input (or output)  
cables.  
• 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 sound is distorted.)  
• The speakers wire are connected  
with wrong + / -polarity.  
• Connect them properly checking  
the + / - 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 ................................................................................................................................................................................... 1000 W × 1  
Rated Power Output  
(4 Ω) (20 Hz – 200 Hz, 0.5 % THD)....................................................................................................................................................200 W × 1  
(2 Ω) (100 Hz, 0.5 % THD)......................................................................................................................................................................400 W × 1  
(1 Ω) (100 Hz, 1.0 % THD)......................................................................................................................................................................500 W × 1  
Frequency Response (+0, –3 dB).................................................................................................................................................5 Hz – 200 Hz  
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 (18 dB/oct.) ..................................................................................................................50 – 200 Hz (variable)  
Infrasonic Filter Frequency (18 dB/oct.)............................................................................................................................. OFF / 15 / 25 Hz  
Bass Boost Circuit (90 Hz) .................................................................................................................................................................OFF / +12 dB  
General  
Operating Voltage.................................................................................................................................................. 14.4 V (11 – 16 V allowable)  
Current Consumption (4 Ω, 10 % THD).........................................................................................................................................................31 A  
Dimensions (W × H × D).....................................................................................................................................................285 × 57 × 268 mm  
Weight.........................................................................................................................................................................................................................2.96 kg  
10 English  
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