KENWOOD KAC718 - Owner's Manual Immediate Download

KAC-718

MONO POWER AMPLIFIER

INSTRUCTION MANUAL

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 3mm2

(AWG12) 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

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

,,,,,,,,,,,,,,,,,,

,,,,,,,,,,,,,,,,,,,,,,,,,,

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 speaker cables.

5. Connect the power cable, power control cable and grounding cable following this order.

6. Install the unit in the car.

7. Connect the negative - terminal of the battery.

· 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

4 English

Controls

Operations of the following control and switches are required in accordance with the center

unit and speakers connected with this unit.

GND

LINE IN

MAX

30

200

0.3

0.5 50

170

120

1.0

90

MIN

INPUT SENSITIVITY(V)

BASS

ENPHASIS

POWER IN

GND

FUSE(25A)

BATT

P.CON(REMOTE)

OFF

ON

LEFT

LOWPASS FILTER

FREQUENCY(Hz)

L

R

RIGHT

SPEAKER LEVEL INPUT

25

MONO POWER AMPLIFIER

MONO

SPEAKER OUTPUT

!

2

14

7 8 9

0

5

6

3

1

RCA cable ground lead terminal

2

LINE IN terminal

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.

For the pre-output level or the maximum power output, refer to the

"Specifications" in the instruction manual of the center unit.

4

LOW PASS FILTER FREQUENCY control

This control adiusts the frequency band output from this unit.

5

BASS EMPHASIS switch

This switch allows to emphasize the output from this unit.

6

Speaker level input terminals

7

Battery terminal

8

Ground terminal

9

Power control (REMOTE) terminal

0

FUSE (25 A

× 1)

!

Speaker output terminals

NOTE

0.3

0.2

0.5

1

2

3

4

5 (V)

(W)

25

15

10

English

5

Protection function

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.

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 activates in the following situations:

· When a speaker cable 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 temperature of internal parts exceeds 120°C (248°F).

· When a ground cable 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.

MONO POWER AMPLIFIER

MONO

SPEAKER OUTPUT

Power indicator

Connection

s Speakers cable connection

MONO POWER AMPLIFIER

MONO

SPEAKER OUTPUT

MONO

SPEAKER

O

UTPU

T

Lead terminal

(Commercially available parts)

Subwoofer

s 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 2

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.

240W

(4

)

4

240W

(4

)

240W

(4

)

240W

(4

)

8

2

120W

(4

)

240W

(4

)

240W

(4

)

120W

(4

)

(120W/8

)

(420W/2

)

Maximum output of

the amplifier

Combined

impedance

Rated input power and

impedance of the speakers