Controls

This is a 4 channel amplifier including 2 stereo amplifiers in a body. One amplifier is referred to as amplifier A and the other is amplifier B. This unit is compatible with a large variety of systems by combining the switches and functions described in the following.

 

 

 

5

 

FUSE(25A)

POWER IN

SPEAKER OUTPUT

BRIDGED

RIGHT

 

GND

 

LEFT

 

A

 

 

BATT

P.CON(REMOTE)

 

 

25

B

 

1

2 3 4

6

SPEAKER LEVEL INPUT

LEFT RIGHT

A

B

7

SPEAKER LEVEL INPUT

A

B

L R

89 0 !

FILTER

OPERATION

INPUT SELECTOR

LINE IN

 

LINE OUT

OPERATION

FILTER

 

(Lch)

 

OFF

STEREO MONO(Lch)

A B

A

A

B

A + B

STEREO MONO

OFF

HPF LPF

 

 

 

 

 

 

 

HPF LPF

 

 

1.0

 

 

 

1.0

 

 

 

0.5

MONO L

L

 

0.5

 

 

 

GND

 

 

 

 

 

 

 

0.3

 

 

 

0.3

 

 

MIN

MAX

 

 

MIN

MAX

4 CHANNEL

 

INPUT

 

 

INPUT

 

SENSITIVITY(V)

R

R

SENSITIVITY(V)

POWER AMPLIFIER

CONTROL

A

 

 

 

 

CONTROL

B

mA

 

 

@

 

 

 

mA

#

$

%

1 Fuse (25 A 1)

When multiple speakers are to be

2 Battery terminal

connected, ensure that the combined

impedance is 4Ω or greater.

3 Ground terminal

2CAUTION

 

4 Power control (REMOTE) terminal

The rated input of the speakers should be

5 Amplifier A speaker output

no less than the maximum output of the

amplifier. Otherwise malfunction may

terminals

result.

 

6Amplifier B speaker output terminals

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 2Ω or greater. When

multiple speakers are to be connected, ensure that the combined impedance is 2Ω 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 4Ω or greater.

7Speaker level input terminals

8INPUT SELECTOR switch

This switch selects the input method of the signals to be amplified by amplifiers A and

B.

A B A

INPUT SELECTOR

A B position:

Amplifies both of the signals input to amplifiers A and B.

A position:

Amplifies only signal input amplifier A with both amplifiers A and B.

9Amplifier A LINE IN terminal

0Amplifier B LINE IN terminal

4

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Kenwood KAC-648 instruction manual Controls

KAC-648 specifications

The Kenwood KAC-648 is a highly regarded car amplifier that is designed to enhance the audio experience in vehicles. Known for its robust performance and advanced features, this amplifier is a top choice for audio enthusiasts looking to upgrade their sound system.

One of the standout features of the KAC-648 is its powerful output capability. It delivers a peak power output of 600 watts, with a continuous power of 75 watts per channel at 4 ohms. This ensures that even the most dynamic audio tracks can be played with clarity and volume without distortion. The amplifier is capable of driving various speaker configurations, making it versatile for different setups in automobiles.

The KAC-648 employs a Class AB circuitry design, which is known for providing a good balance between sound quality and power efficiency. Class AB amplifiers are favored in the automotive audio community because they deliver a warm and rich sound while also maintaining low heat levels during operation. This means that users can enjoy long listening sessions without worrying about the amplifier overheating.

In terms of installability, the KAC-648 comes with various features that facilitate easy integration into any car audio system. It includes speaker level inputs, allowing the amplifier to connect directly to the factory radio without requiring a line output converter. Additionally, the amplified system has adjustable bass boost and crossover controls that provide tuning flexibility, enabling users to adapt the sound to their personal preferences and achieve a custom audio experience.

The build quality of the Kenwood KAC-648 is notable, featuring a durable metal chassis that not only protects the internal components but also ensures longevity. The amplifier is designed to withstand the rigors of automotive environments, with features that guard against short circuits and overheating.

Another key aspect of the KAC-648 is its compact design, which allows for flexible installation options in various vehicle types. Due to its relatively small footprint, it can be mounted in tight spaces without sacrificing power or performance.

Overall, the Kenwood KAC-648 amplifier stands out in the competitive car audio market for its robust performance, versatility, and user-friendly features. Whether you are looking to simply enhance your vehicle's sound system or build a complete high-performance audio setup, the KAC-648 is an excellent choice that delivers exceptional value and quality.