KENWOOD KAC-818 Owner's Manual

Cover page of KENWOOD KAC-818 Owner's Manual

Owner's Manual for KENWOOD KAC-818, downloadable as a PDF file.

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KAC-818
© B64-1355-00 (EM)
MONO POWER AMPLIFIER
INSTRUCTION MANUAL
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KAC-818
© B64-1355-00 (EM)
MONO POWER AMPLIFIER
INSTRUCTION MANUAL
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2 English
Safety precautions
To prevent injury or fire, take the following
precautions:
· When extending the ignition, battery, or
ground wires, make sure to use automotive-
grade wires or other wires with a 5mm2
(AWG10) or more to prevent wire
deterioration and damage to the wire
coating.
· To prevent a short circuit, never put or leave
any metallic objects (such as coins or metal
tools) inside the unit.
· If the unit starts to emit smoke or strange
smells, turn off the power immediately and
consult your Kenwood dealer.
· Do not touch the unit during use because the
surface of the unit becomes hot and may
cause burns if touched.
To prevent damage to the machine, take the
following precautions:
· Be sure the unit is connected to a 12V DC
power supply with a negative ground
connection.
· Do not open the top or bottom covers of the
unit.
· Do not install the unit in a spot exposed to
direct sunlight or excessive heat or humidity.
Also avoid places with too much dust or the
possibility of water splashing.
· When replacing a fuse, only use a new one
with the prescribed rating. Using a fuse with
the wrong rating may cause your unit to
malfunction.
· To prevent a short circuit when replacing a
fuse, first disconnect the wiring harness.
· If you experience problems during
installation, consult your Kenwood dealer.
· If the unit does not seem to be working
right, consult your Kenwood dealer.
Cleaning the unit
If the front panel gets dirty, turn off the power
and wipe the panel with a dry silicon cloth or
soft cloth.
Do not wipe the panel with a hard cloth or a
cloth dampened by volatile solvents such as
paint thinner and alcohol. They can scratch the
surface of the panel and/or cause the indicator
letters to peel off.
Accessories
2CAUTION
NOTE
2CAUTION
2WARNING
Part name
Number
of Items
External
View
Round terminal
(Large)
1
Round terminal
(Medium)
2
Round terminal
(Small)
1
Terminal cover
(Power terminal)
1
Self-tapping screws
(ø4
×16 mm)
4
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English
3
Installation procedure
Installation
Since the power amplifier has no parts which require operation, it can be installed at a position
away from the driver's seat without any hindrances.
As generally accepted positions for its installation, places such as inside the trunk, etc. can be
considered.
· 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.
2CAUTION
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Installation board, etc.
(thickness : 15 mm or more)
Self-tapping screw
(ø4
×16 mm)
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 cables of the units.
4. Connect the center unit and this unit according to the required application.
5. Connect the speaker cables and sigma servo feed back cables.
6. Connect the power cable, power control cable and grounding cable following this order.
7. Install the unit in the car.
8. Connect the negative - terminal of the battery.
9. Turn power ON and ensure that sound is output normally.
· If sound is not output normally, immediately turn power off and check connections. Be sure to
perform the sigma servo connection correctly.
· Be sure to make correct connections of the sigma servo terminals.
· Be sure to turn the power off before changing the setting of any switch.
· If the fuse blows, check cables for shorts, then replace the fuse with one of the same rating.
· Check that no unconnected cables or connectors are touching the car body. Do not remove
caps from unconnected cables or connectors to prevent short circuits.
· Connect the speaker cables to appropriate speaker connectors separately. Sharing the negative
cable of the speaker or grounding speaker cables 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.
2CAUTION
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4 English
Controls
Operations of the following control and switches are required in accordance with the center
unit and speakers connected with this unit.
MONO
POWER AMPLIFIER
L
25Hz
15Hz
INFRASONIC
OFF
INPUT
SENSITIVITY(V)
LPF
FREQUENCY(Hz)
GND
R
LINE IN
0.3
0.5
1
2
3
4
5
0.2
150
100
70
50
200
LEFT
RIGHT
SPEAKER LEVEL INPUT
POWER IN
FUSE(20A)
BATT
GND
FUSE(20A)
P.CON(REMOTE)
SPEAKER OUTPUT
20
20
SERVO
SERVO
1 2 3
45
6
@
7
8 9 0 !
1
FUSE (20 A
×2)
2
Battery terminal
3
Ground terminal
4
Power control (REMOTE) terminal
5
Speaker output terminals
As this unit accepts speakers with a minimum impedance of 2 ohms, connect speakers with
2-ohm or higher impedance to these terminals.
The rated input of the speakers should be no less than the maximum output of the amplifier.
Otherwise malfunction may result.
6
SIGMA SERVO FEED BACK terminals (See p.8)
Be sure to make proper connections to the SIGMA SERVO FEED BACK terminals. Incorrect
connection may result in lack of sound output or other malfunctions.
7
INFRASONIC FILTER switch
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.
8
LOW PASS FILTER FREQUENCY control
This control adjusts the frequency band output from this unit.
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.
2CAUTION
2CAUTION
0.3
0.2
0.5
1
2
3
4
5 (V)
(W)
25
15
10
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For the pre-output level or the maximum power output, refer to the "Specifications" in the
instruction manual of the center unit.
0
RCA cable ground lead terminal
!
LINE IN terminal
@
Speaker level input terminals
NOTE
s 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.
s 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.
· A speaker cable may be short-circuited.
· A speaker output may be in contact with the ground.
· The temperature of the internal parts may be higher than 120°C (248°F).
· The sigma servo connection may be erroneous.
· The fuse of this unit may be blown.
· The unit may be malfunctioning and sending DC signal to the speaker output.
· The grounding cable of this unit may not be connected with a metallic part which is
electrically connected with the negative terminal of the battery.
· The power control cable may not be connected to this unit.
· The grounding cable of the center unit (cassette receiver, CD receiver, etc.) may not be
connected with a metallic part which is electrically connected with the negative terminal of
the battery.
English
5
Power indicator
Power indicator

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