Kenwood KDC X791 Manual

The Kenwood KDC X791 is a high-performance car stereo receiver featuring CD/MP3/WMA playback, built-in MOSFET 50Wx4 amplifier, detachable faceplate security, 3 preamp outputs (4V), advanced sound customization with 13-band EQ, Sirius Satellite Radio ready, HD Radio compatible, Bluetooth connectivity, USB input, and auxiliary input. Below are key sections for features, installation, operation, settings, and troubleshooting.

Features at a Glance

Key components: Main unit with detachable faceplate, remote control, wiring harness, mounting sleeve, user manual.

Feature	Description
CD/MP3/WMA Playback	Plays CDs, MP3, and WMA formats
MOSFET Amplifier	50W x 4 high-power output
Detachable Faceplate	Security feature to prevent theft
3 Preamp Outputs	4V outputs for external amplifiers
13-Band Equalizer	Advanced sound customization
Bluetooth Connectivity	Wireless audio streaming and hands-free
USB Input	For USB devices and charging
Auxiliary Input	3.5mm jack for external audio sources
Sirius Satellite Ready	Satellite radio compatibility
HD Radio Compatible	Digital radio reception

Installation

Prepare vehicle and gather necessary tools before installation.

1. Disconnect negative battery terminal for safety.
2. Remove existing stereo using removal tools.
3. Connect wiring harness following color-coded wires.
4. Install mounting sleeve and secure unit.
5. Connect antenna and all input cables.
6. Test all functions before final assembly.

WARNING! Always disconnect battery before installation to prevent electrical shorts.

Basic Operation

Power on unit and familiarize with basic controls.

1. Power: Press SRC/OFF button to turn on/off.
2. Source Selection: Press SRC to cycle through available sources.
3. Volume Control: Use rotary knob or remote control buttons.
4. Playback Controls: Use transport buttons for CD/USB playback.
5. Mode Selection: Access different audio modes via FUNCTION button.

CAUTION! Do not operate while driving if it distracts from safe vehicle operation.

Specifications

• Power Output: 50W x 4 (MOSFET)
• Preamp Outputs: 3 channels (4V front, rear, sub)
• Frequency Response: 10Hz - 20kHz
• Signal-to-Noise Ratio: 105dB
• Supported Formats: CD, CD-R/RW, MP3, WMA
• Equalizer: 13-band graphic EQ
• Bluetooth Version: 2.1 + EDR
• USB Support: USB 2.0, up to 32GB
• Power Requirement: 12V DC negative ground

Controls and Settings

Front panel controls: SRC/OFF, Volume knob, Function, Audio, Band, Loudness, ATT.

Remote Control: Power, Volume, Mode, Track up/down, Preset, Mute, Display.

Basic Settings: Clock set, Display dimmer, Beep on/off, Language selection. Audio Settings: Bass, Treble, Balance, Fader, Loudness, Subwoofer level. Source Settings: CD repeat/shuffle, USB mode, Aux input level.

Audio Customization

Advanced sound adjustment options available.

1. 13-Band Equalizer: Adjust frequencies from 50Hz to 16kHz.
2. Crossover Settings: High-pass and low-pass filter adjustments.
3. Time Alignment: Adjust speaker delay for optimal sound staging.
4. Loudness: Enhance bass at low volume levels.
5. Sound Presets: Rock, Pop, Jazz, Classical, User custom.

Tip: Use test tones and measurement tools for precise audio calibration.

Bluetooth Connectivity

Wireless audio streaming and hands-free calling.

1. Pairing Mode: Hold BT button until display shows "PAIRING".
2. Device Search: Enable Bluetooth on mobile device and select "KENWOOD X791".
3. Connection: Enter PIN "0000" if prompted.
4. Audio Streaming: Play music from connected device.
5. Phone Calls: Answer/end calls using unit controls.

WARNING! Always park vehicle in safe location when pairing new devices.

USB and Auxiliary Input

Connect external devices for expanded media playback.

1. USB Connection: Insert USB device into front panel port.
2. File Navigation: Use folder/track buttons to browse files.
3. Aux Input: Connect 3.5mm cable from external device.
4. Source Selection: Press SRC until AUX mode is selected.
5. Playback Control: Control playback from connected device.

CAUTION! Do not remove USB device during playback to prevent data corruption.

Security Features

Protect your investment with built-in security measures.

Detachable Faceplate: Remove when parked to deter theft. Security Code: Set 4-digit code in menu (default 0000). Auto-Lock: Unit locks automatically after power loss. LED Indicator: Flashing red light indicates security mode active.

Regulatory Information

FCC Part 15: Class B digital device compliant. Bluetooth SIG qualified. Copyright © Kenwood Corporation. For technical support, visit www.kenwood.com or contact 1-800-536-9663. This device complies with part 15 of FCC rules.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Wiring/security lock	Check fuse and connections; enter security code
No sound	Settings/speakers	Check volume, mute, speaker connections
Bluetooth not connecting	Pairing mode/device	Enable pairing mode; delete old pairing; restart devices
USB not recognized	Format/compatibility	Use FAT32 format; check file compatibility
CD skipping	Disc/dirty lens	Clean disc; use CD lens cleaner; check vibration

Reset: Hold SRC and Audio buttons for 3 seconds to factory reset.

Service: 1-800-536-9663; www.kenwood.com