Safety precautions

2WARNING

To prevent injury and/or fire, take the following precautions:

•When extending the battery or ground cables, make sure to use automotive-grade cables or other cables with an area of 3 mm2 (AWG12) or more to prevent cable deterioration and damage to the cable coating.

•To prevent short circuits, never put or leave any metallic objects (e.g., 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 short circuits 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.

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.

Accessories

Part name

External

Number of

View

Items

 

Round terminal

 

1

(Large)

 

 

 

Round terminal

 

2

(Medium)

 

 

 

Round terminal

 

1

(Small)

 

 

 

Terminal cover

 

1

(Power terminal)

 

 

 

Self-tapping screws

 

4

(ø4 ⋅ 16 mm)

 

 

 

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.

■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

Power indicator

protection function may be activated. Check whether there is any

 

indication of trouble.

 

■The protection function activates in the following

situations:

• When a speaker cable may be short-circuited.

•When a speaker output contacts ground.

•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.

2

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Kenwood KAC-648 instruction manual Safety precautions, Protection function
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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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