Kenwood KAC-7251, KAC-7201 User Manual

KAC-7251 KAC-7201

POWER AMPLIFIER 7 page 2-13

INSTRUCTION MANUAL

AMPLIFICATEUR DE PUISSANCE 7 page 14-25

MODE D’EMPLOI

AMPLIFICADOR DE POTENCIA 7 página 26-37

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-7251/7201 Serial number

Safety precautions

F F

+ 6

+ 12

2WARNING

To prevent injury or fire, take the following precautions:

•When extending the ignition, battery, or ground wires, make sure to use automotivegrade wires or other wires with a 5 mm (AWG 10) 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.

2CAUTION

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.

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.

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.

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.

2CAUTION

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 indicator informs you of the condition. (Refer to page 5)

Accessories

Part name

Self-tapping screws

(ø4 × 16 mm)

Terminal cover

(Power terminal)

Speaker level input

cable

External

View

Number of

Items

(KAC-7251 only)

Part name

External

View

Remote cable 1

Remote controler 1

Knob 1

Dressing plate 1

Nut 1

Washer 1

Self-tapping screws

(ø3 × 12 mm)

Number of

Items

2 English

Double-side tape 1

Installation

OFF

+12

Remote controler (KAC-7251 only)

Double-side tape

Remote cable

Remote controler

Knob

Self-tapping screw

Cooling fan

(ø4 × 16 mm)

Self-tapping screw (ø3 × 12 mm)

Dressing plate

Washer

Nut

NOTE

Mount the Dressing plate

OFF

+12

according to the mount angle of the Remote Controller.

Installation board, etc. (thickness : 15 mm or more)

Fully rotate the knob counterclockwise (CCW), and adjust the marking of the knob to the "OFF" position of the Dressing plate.

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.

• This unit has cooling fans to decrease the internal temperature. Be careful not to block the cooling fan openings when installing the unit. 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.

English 3

Controls / Indicator

12 3 45

(W)

1 LPF FREQUENCY control

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

2 FILTER switch

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

• HPF (High-Pass Filter) position:

Only frequencies of 150 Hz or higher are output. (Frequencies below 150 Hz are cut.)

• 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).

3 BASS BOOST switch

Sets the boost level for bass control.

• 12dB position:

BASS BOOST is +12 dB.

• KAC-7201: OFF position:

BASS BOOST is OFF.

• KAC-7251: OFF(REMOTE) position:

Can be set from the Remote Controller.

NOTE

If you have disconnected the Remote Controller, the BASS BOOST is turned OFF.

4 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.)

5 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.

NOTE

For the pre-output level or the maximum power output, refer to the “Specifications” in the instruction manual of the center unit.

6 Remote controler control (KAC-

7251 only)

When the "BASS BOOST" switch is in the "OFF (REMOTE)" position, control the Bass Boost level from the Remote Controller.

• OFF position:

BASS BOOST is OFF.

• +6/+9/+12 position:

Boost the bass sound by +6 dB, +9 dB and +12 dB, respectively.

4 English

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