!LINE OUT terminal

These jacks output respectively the signals input to amplifiers A and B. They always output the stereo signals regardless of the position of the OPERATION switch.

@RCA cable ground lead terminal

#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.

The sensitivities of amplifiers A and B can be adjusted independently regardless of the position of the input selector switch.

Use the diagram on

 

15

 

10

the right as a guide.

 

 

 

1.0

 

 

 

 

 

 

 

 

 

1.0

 

 

 

 

2.0

 

0.5

0.5

 

 

 

3.0

 

0.3

0.3

 

 

25

MIN

MAX

 

 

 

 

 

 

 

 

4.0 (V)

 

 

 

 

 

 

0.2

 

NOTE

 

 

 

(W)

 

 

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

$OPERATION switch

The amplification methods of the signals input to amplifiers A and B can be selected

independently according to the setting of this switch.

•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.)

%FILTER switch

These switches allow filtering of the speaker output signals.

•HPF(High Pass Filter) position:

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

•LPF(Low Pass Filter) position:

Only frequencies of 80Hz or lower are output. (Frequencies above 80Hz are cut.) The Lch and Rch will be mixed before output even if the operation switch is set to

STEREO.

•OFF position:

The original sound without filtering is output.

System examples

■Full-range 4-channel + Subwoofer system

 

 

 

 

 

 

1.0

 

FILTER

 

OPERATION

0.5

 

OFF

 

STEREO

MONO(Lch)

 

 

HPF

LPF

0.3

 

 

 

 

 

MIN

MAX

INPUT SELECTOR CONTROL

A

 

INPUT

 

SENSITIVITY(V)

A B

A

 

B

 

 

 

 

CONTROL

 

 

1.0

 

FILTER

 

OPERATION

0.5

 

OFF

 

 

(Lch)

 

 

HPF

LPF

STEREO

MONO

0.3

 

 

 

 

 

MIN

MAX

 

 

 

 

 

INPUT

 

 

 

 

 

SENSITIVITY(V)

CENTER UNIT

Switch setting

L

A

L

Front

R

R

speaker

 

 

L

B

 

Rear

R

L

L LINE

R

speaker

 

R OUT

 

 

L

 

 

Subwoofer

R

 

 

 

 

 

Power amplifier

 

5

Page 4 Page 6
Page 5
Image 5
Kenwood KAC-648 instruction manual System examples
Page 4 Page 6

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.
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