INSTALLATION / CONNECTION

Warning

•The unit can only be used with a 12 V DC power supply, negative ground.

•Disconnect the battery’s negative terminal before wiring and mounting.

•Do not connect Battery wire (yellow) and Ignition wire (red) to the car chassis or Ground wire (black) to prevent a short circuit.

•Insulate unconnected wires with vinyl tape to prevent a short circuit.

•Be sure to ground this unit to the car’s chassis again after installation.

Caution

•

For safety’s sake, leave wiring and mounting to professionals. Consult

 

the car audio dealer.

• Install this unit in the console of your vehicle. Do not touch the metal

 

parts of this unit during and shortly after use of the unit. Metal parts

 

such as the heat sink and enclosure become hot.

•

Do not connect the · wires of speaker to the car chassis, Ground wire

 

(black), or in parallel.

•

Connect speakers with a maximum power of more than 50 W. If the

 

maximum power of the speakers is lower than 50 W, change the

•

[AMP GAIN] setting to avoid damaging the speakers. (➜10)

Mount the unit with the angle of 30° or less.

•

If your vehicle wiring harness does not have the ignition terminal,

 

connect Ignition wire (red) to the terminal on the vehicle’s fuse box

 

which provides 12 V DC power supply and is turned on and off by the

 

ignition key.

Installing the unit (in-dash mounting)

Do the required wiring.

(➜ 15)

Bend the appropriate tabs to hold the sleeve firmly in place.

Make sure the direction of the trim plate.

•

After the unit is installed, check whether the brake lamps, blinkers,

 

wipers, etc. on the car are working properly.

•

If the fuse blows, first make sure the wires are not touching car’s

 

chassis, then replace the old fuse with one that has the same rating.

Basic procedure

1Remove the key from the ignition switch, then disconnect the · terminal of the car battery.

2Connect the wires properly. See Wiring connection. (➜15)

3Install the unit to your car.

See Installing the unit (in-dash mounting).

4Connect the · terminal of the car battery.

5 Reset the unit. (➜3)

When installing without the mounting sleeve

Flat or round head screws (not supplied)

M5 × 8 mm (M5 × 3/8")

Pocket

Bracket (not supplied)

How to remove the unit

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JVC KD-R640, KD-A645 Installing the unit in-dash mounting, Basic procedure, When installing without the mounting sleeve
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KD-R540, KD-A645, KD-R440, KD-R640 specifications

The JVC KD series of car stereos includes several popular models: the KD-A645, KD-R640, KD-R540, and KD-R440. Each model is equipped with features tailored to enhance the in-car audio experience, making them a favorite among both casual listeners and serious audiophiles.

Starting with the KD-A645, this model stands out with its support for Bluetooth connectivity, allowing users to stream music wirelessly from their devices. The built-in Bluetooth capabilities also facilitate hands-free calling, promoting safer driving without sacrificing communication. The KD-A645 also incorporates a large illuminated display, making it easy to read track and playlist information even in low-light conditions. It comes with a 13-band equalizer, enabling personalized sound tuning to match the listener's preferences. Additionally, it supports USB ports, auxiliary inputs, and is compatible with various file formats, including MP3 and FLAC, ensuring versatile audio playback.

Moving on to the KD-R640, this model retains many of the core features of the KD-A645 while placing a stronger emphasis on traditional connectivity options. It features a USB input compatible with both Android and iOS devices. The KD-R640 is designed with a 50W x 4 MOSFET power amplifier, delivering powerful sound output. Its variable color illumination allows users to customize the display color to match their vehicle's interior. The model is also known for its CD playback capabilities alongside support for FM/AM radio, making it a reliable choice for those who still enjoy traditional audio sources.

The KD-R540 brings forward a simplified interface aimed at users who prefer straightforward functionality. It features a single USB input and auxiliary input for external devices. The model is equipped with a 24-bit DAC, enhancing sound clarity and quality during playback. While it lacks Bluetooth functionality, it compensates with a strong emphasis on traditional audio formats, including CD and radio, making it ideal for users who prioritize these options.

Lastly, the KD-R440 represents an entry-level option without sacrificing essential features. This model also offers a CD player, AM/FM radio, and an auxiliary input for external connections. Its easy-to-read display and intuitive controls make it user-friendly, especially for those who may not be tech-savvy. The KD-R440 is built to provide solid audio performance, with a focus on delivering dependable sound quality at an accessible price.

Collectively, the JVC KD series models offer a range of features suitable for varying user preferences, from advanced connectivity and personalized settings to user-friendly interfaces. Whether for streaming music or enjoying classic audio formats, each model ensures a dynamic and enjoyable in-car listening experience.
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