Antenna Receptacle

Power Antenna Lead (Blue)

Connect this lead to the +B terminal of your power antenna, if applicable.

•This lead should be used only for controlling the vehicle's power antenna. Do not use this lead to turn on an amplifier, or a signal processor, etc.

Remote Turn-On Lead (Blue/White)

Connect this lead to the remote turn-on lead of your amplifier or signal processor.

Audio Interrupt In Lead (Pink/Black)

Illumination Lead (Orange)

This lead may be connected to the vehicle's instrument cluster illumination lead. This will allow the backlighting of the CDA-9857 to dim whenever the vehicle's lights are turned on.

Switched Power Lead (Ignition) (Red)

Connect this lead to an open terminal on the vehicle's fuse box or another unused power source which provides (+)12V only when the ignition is turned on or in the accessory position.

Battery Lead (Yellow)

Connect this lead to the positive (+) post of the vehicle's battery.

Ground Lead (Black)

Connect this lead to a good chassis ground on the vehicle. Make sure the connection is made to bare metal and is securely fastened using the sheet metal screw provided.

Power Supply Connector

Right Front (+) Speaker Output Lead (Gray) Right Front (-) Speaker Output Lead (Gray/Black) Right Rear (-) Speaker Output Lead (Violet/Black) Right Rear (+) Speaker Output Lead (Violet)

Left Rear (+) Speaker Output Lead (Green)

Left Rear (-) Speaker Output Lead (Green/Black) Left Front (-) Speaker Output Lead (White/Black) Left Front (+) Speaker Output Lead (White)

Fuse Holder (10A)

Ai-NET Connector

Connect this to the output or input connector of another device (CD Changer, Equalizer, HD Radio™ TUNER MODULE, etc.) equipped with Ai-NET.

•Interface adapter for iPod™ (KCA-420i) is not recommended for use with this product.

•You can input TV/video sound by connecting an optional Ai-NET/ RCA Interface cable (KCA-121B) to this component.

Steering Remote Control Interface Connector

To steering Remote control interface box.

Rear Output RCA Connectors

RED is right and WHITE is left.

Front Output RCA Connectors

RED is right and WHITE is left.

Subwoofer RCA Connectors

RED is right and WHITE is left.

Ai-NET Cable (Included with CD Changer)

RCA Extension Cable (sold separately)

iPod Direct Connector

iPod control signals.

Connect this to an iPod, using the (also separately sold) FULL SPEED™ connection cable (KCE-422i).

FULL SPEED™ Connection Cable KCE-422i (sold separately)

System Switch

When connecting a processor or divider using Ai-NET, place this switch in the EQ/DIV position. When no device is connected, leave the switch in the NORM position.

•Be sure to turn the power off to the unit before changing the switch position.

To prevent noise/interference in the audio system.

•Locate the unit and route the leads at least 10 cm away from the car harness.

•Keep the battery power leads as far away from other leads as possible.

•Connect the ground lead securely to a bare metal spot (remove any paint, dirt or grease if necessary) of the car chassis.

•If you add an optional noise suppressor, connect it as far away from the unit as possible. Your Alpine dealer carries various noise suppressors, contact them for further information.

•Your Alpine dealer knows best about noise prevention measures so consult your dealer for further information.

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CDA-9857 specifications

The Alpine CDA-9857 is a versatile single DIN car stereo that combines advanced sound quality with user-friendly features, making it a popular choice among car audio enthusiasts. Launched in the mid-2000s, it reflects Alpine's commitment to innovation, providing drivers with an exceptional listening experience. The CDA-9857 stands out due to its extensive sound tuning capabilities, allowing users to customize audio settings to suit their preferences.

One of the key features of the CDA-9857 is its 24-bit DAC (Digital-to-Analog Converter), which enhances sound clarity and detail. This technology significantly improves audio playback quality, making music sound crisp and well-defined across all genres. Additionally, the stereo supports multiple audio formats, including MP3, WMA, and AAC, ensuring compatibility with various media sources.

The CDA-9857 is equipped with a built-in EQ, featuring customizable presets and a 3-band parametric EQ. This allows users to adjust the bass, midrange, and treble frequencies independently, tailoring the audio output to match the acoustics of their vehicle. Furthermore, the stereo includes Alpine's proprietary “Media Xchange” technology, which enables the connection of external devices, like iPods and USB drives, thus allowing easy access to vast music collections.

For those who prioritize connectivity, the CDA-9857 features AUX inputs, a front USB port, and is compatible with Bluetooth hands-free calling when paired with a Bluetooth adapter, ensuring safety and convenience while driving. The unit also includes a convenient remote control, allowing easy navigation of its numerous options without having to reach for the dial.

Visually, the CDA-9857 boasts an attractive design, featuring a vibrant blue illuminated display that enhances readability and complements most car interiors. Its ergonomic controls make it user-friendly, enabling quick adjustments while on the go.

Overall, the Alpine CDA-9857 stands out as a feature-rich unit with a robust set of technologies designed to enhance the car audio experience. With its exceptional sound quality, customizable features, and excellent connectivity options, the CDA-9857 remains a solid choice for anyone looking to improve their in-car entertainment system.
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