KENWOOD KACX521 - Owner's Manual Immediate Download

KAC-X621

KAC-PS621

KAC-X521

KAC-PS521

STEREO/BRIDGEABLE POWER AMPLIFIER 7 page 2-9

INSTRUCTION MANUAL

AMPLIFICATEUR DE PUISSANCE STEREO/COMPATIBLE 7 page 10-17

MODE D'EMPLOI

ESTÉRO/AMPLIFICADOR DE POTENCIA CONECTABLE 7 página 18-25

MANUAL DE INSTRUCCIONES

Take the time to read through this instruction manual. Familiarity

with installation and operation procedures will help you obtain the

best performance from your new power amplifier.

For your records

Record the serial number, found on the back of the unit, in the spaces

designated on the warranty card, and in the space provided below.

Refer to the model and serial numbers whenever you call upon your

KENWOOD dealer for information or service on the product.

Model KAC-X621/PS621/X521/PS521

Serial number

2 English

Safety precautions

WARNING

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 8 mm² (AWG 8) 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.

FCC WARNING

This equipment may generate or use radio frequency energy. Changes or

modifications to this equipment may cause harmful interference unless the

modifications are expressly approved in the instruction manual. The user could

lose the authority to operate this equipment if an unauthorized change or

modification is made.

CAUTION

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.

Available Control Units:

A KENWOOD's LX-Bus supporting Center Unit released in 2004 or later can

control this unit. The operations of the (LX) AMP Control are explained in the

Operation Manual of the Center Unit.

NOTE

· The LX AMP and the sensor unit cannot be connected simultaneously. You

must connect any of them at a time.

NOTE

· If you experience problems during installation, consult your Kenwood dealer.

· If the unit does not seem to be working right, consult your Kenwood dealer.

NOTE

This Class B digital apparatus complies with Canadian ICES-003.

This Product is not installed by the manufacturer of a vehicle on the production

line, nor by the professional importer of a vehicle into an EU Member State.

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.

CAUTION

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.

To prevent battery rise

When the unit is used in the ACC ON position without turning the engine ON, it

depletes the battery. Use it after starting the engine.

Protection function

There is a Protection function installed in the unit to protect the unit and

speakers from various problems. When Protection operates, the display informs

you of the condition.

Display

Informations

"E-01"

When the inside of the unit is overheating.

"E-02"

When the unit has failed and direct current voltage is generated to the speaker's

output.

NOTE

Turn the power OFF and release the protection. If the "E-02" code does not disappear,

contact your Kenwood dealer.

"E-03"

When the speaker cord is shorted.

When the speaker output is in contact with the vehicle ground.

"VOLT" display is

blinked.

When voltage gets out of operation range.

Wiring

· 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.

· 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 8 mm² (AWG 8) 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.

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 2

or greater (for stereo connections), or 4 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.

Combined impedance

English

Installation board, etc.

(thickness : 15 mm or more)

Self-tapping screw

(ø5 × 18 mm)

Cooling fan

Installation

Accessories

Part name

External View Number of Items

Self-tapping screws

(ø5 × 18 mm)

Hexagon socket head cap screw

(M4 × 8 mm)

Cover

Terminal cover (Power terminal)

Hexagon Wrench

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.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 installation fittings in the unit.

7.Attach the unit.

8.Install the terminal cover.

9.Connect the negative - terminal of the battery.

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 fans 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.

Hexagon socket

head cap screw

(M4 × 8 mm)

Hexagon Wrench

Cover

Duct

Cooling fan

4 English

Connection

CENTER UNIT

(CD receiver, etc.)

RCA cable ground terminal

RCA cable*

Lead terminal*

Left speaker

Right speaker

Bridged Connections

Speaker (Bridged)

Battery

Ground wire*

Battery wire*

Protective Fuse*

* Commercially available parts

Power control wire

Left input

Right input

LX-Bus connection

S-video cable*

Master amplifier

Slave amplifier 1

CENTER UNIT

To KENWOOD disc changer/

External optional accessory

WARNING

To prevent fire caused by a short in the wiring,

connect a fusible link or breaker nearby the

battery's positive terminal.

CAUTION

· 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.

RCA cable*

Slave amplifier 7

Extension wire*

Set the ID number of the Master amplifier to "0".

You can connect up to 7 Slave amplifiers. Assign them ID numbers "1"

to "7" and do not duplicate them.

CAUTION

· Do not connect 2 Master amplifiers to the Center Unit. If done, you

cannot control all amplifiers connected to the Center Unit.

· The LX AMP and the sensor unit cannot be connected

simultaneously. You must connect any of them at a time.

NOTE

· The total length of S-video cables you can connect is 14 meters

(46 ft) maximum. If the cable length exceeds this limit, you cannot

control amps from the Center Unit.

· If you assign the same ID number to multiple amplifiers, they

malfunction when you operate any of them from the Center Unit.

· If you assign ID number "8" or "9" to a Slave amplifier, it is not

recognized by the Center Unit.

Not more than

14m (46 ft)

Control cable

(option)

Terminal cover

Power control wire

English

Controls

Fuse (KAC-X621/PS621 : 25 A × 3 , KAC-X521/PS521 : 30 A × 2)

Battery terminal

Ground terminal

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

· 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 2 or greater.

When multiple speakers are to be connected, ensure that the combined

impedance is 2 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

and the RIGHT channel

· SPEAKER OUTPUT terminals.)

The speakers to be connected should have an impedance of 4 or greater.

When multiple speakers are to be connected, ensure that the combined

impedance is 4 or greater.

CAUTION

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.

ID NUMBER switch

Sets an amp identification number (ID) to be used for amplifier control from

the Center Unit.

Assign ID Number "0" to an amplifier when you use it as the Master amplifier.

Assign ID Numbers "1" to "7" to amplifiers when you use them as Slave

amplifiers. Do not duplicate these numbers.

NOTE

After you have changed ID numbers of amplifiers, turn Off the POWER switch

of the Center Unit and turn it On again.

TO H/U terminal

After you have set the Master amplifier, connect it to the Center Unit.

REMOTE terminals

Used to connect to Slave amplifiers.

RESET button

Resets the microprocessor of the unit.

NOTE

The values you have set with the Amplifier Control are NOT reset.

LINE IN terminal

LINE OUT terminal

The signal that's input from the line input terminal is output.

Power indicator

Lights when the POWER switch is turned On.

The indicator flashes several seconds when the POWER switch is turned On

or when the Protection function is activated.

LPF FREQUENCY control

Sets the cutoff frequency when the "FILTER" switch is set to "LPF".

HPF FREQUENCY control

Sets the cutoff frequency when the "FILTER" switch is set to "HPF".

FILTER switch

This switch allows to apply high-pass or low-pass filtering to the speaker

outputs.

· HPF (High-Pass Filter) position:

The filter outputs the band of higher frequencies than the frequency set

with the "HPF 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 "LPF FREQUENCY" control.

The speaker output is automatically switched to monaural (L+R).

AMP CONT (amplifier control) switch

Used to bypass the circuit when you do not control the sound with the

Amplifier Control.

· ON position:

Allows you to control the sound with the Amplifier Control.

· OFF position:

Bypasses the Amplifier Control circuit.

NOTE

Amplifier control is possible even while OFF.

ISF (infrasonic filter) switch

When this switch is "ON", the frequencies which are below the audible

range and therefore inaudible are cut off so that the quality of the audible

frequencies can be improved.

(

OPERATION switch

This switch is used to select the operation mode of the amplifier.

· 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.)

)

INPUT SENSITIVITY control

Set this control according to the pre-output level of the center unit

connected with this unit.

NOTE

For the pre-output level, refer to the "Specifications" in the instruction manual

of the center unit.

KAC-X521/

KAC-PS521

KAC-X621/

KAC-PS621