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Kenwood KDC-BT648U

CD receiver (New Stock)

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  • Kenwood KDC-BT648U

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Item #: 113BT648U
 

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Original price $179.99
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Our take on the Kenwood KDC-BT648U

by Ken Nail
Kenwood

Why replace your factory radio?

Two good reasons - sound quality and cool features. A new car stereo offers power that's superior to most factory radios, along with more sophisticated tone controls. And most car stereos offer built-in or optional features that add safety and fun to life in your car, including inputs for your iPod or MP3 player, Bluetooth connectivity for hands-free cell phone calls, satellite radio or HD Radio reception, and connections for building an audio system in your car.

Driving can be dangerous when you're distracted. The Bluetooth capability that's built into Kenwood's KDC-BT648U CD receiver keeps your mind where it should be — on the road. When you answer a call, it's just like talking to someone who's sitting next to you, so you can keep your hands on the wheel and leave your phone in your pocket. A dedicated "phone" button on the receiver's face makes it easy to "pick up" when a call comes in.

iPod® control for your drive-time tunes
Connect your player to the receiver's front-panel USB input, and you're ready to navigate the tracks and playlists on your iPod. Dedicated "Search" and "Return" keys cut down on the need to work through menus when you're looking for a specific song, while the "Passenger Mode" lets you control your iPod or iPhone® from the device itself — that's a useful feature if you're listening to streaming content like Internet radio stations over your iPhone.

And more entertainment options
The front-panel auxiliary input offers an instant connection for a portable satellite radio or another sound source. You can play all kinds of CDs, even discs that you've loaded with MP3 and WMA files. And, you can add a Kenwood HD Radio™ tuner or satellite radio to enjoy the best in radio.

Want to keep your car's steering wheel audio controls?
In most vehicles, you can use an adapter to connect your vehicle's steering wheel controls to this Kenwood stereo. Connect a few wires, then program the adapter for your particular car and the Kenwood, and you'll retain the convenience of your steering wheel controls. Check the "Accessories" tab for compatible adapters.

Bluetooth note: Use of this receiver's Bluetooth features will depend upon your phone's Bluetooth capabilities. Learn more in our article explaining Bluetooth profiles.

Note: If you're going to use your iPod with this receiver, be sure to check "Details" for specific iPod model compatibility with this receiver.

See more info on this item

Highlights:

    General features:
    • CD receiver with AM/FM tuner
    • built-in MOSFET amplifier (22 watts RMS/50 peak x 4 channels)
    • plays CDs, CD-Rs, and CD-RWs, including discs loaded with MP3, WMA and AAC files
    • built-in Bluetooth for hands-free calling
    • detachable face with 13-character fluorescent display
    • wireless remote control
    Audio features:
    • System Q sound control (3-band parametric equalizer and 8 preset EQ curves)
    • high-pass filters (speaker and preamp outputs), low-pass filter and subwoofer level control (sub preamp output)
    • speaker settings that let you tailor the sound to the size and location of speakers in your car
    • Supreme Setting improves the sound of low-bitrate music files
    • 24-bit DAC
    Expandability:
    • built in iPod control — no adapter necessary, but adding Kenwood's optional connecting cable lets you leave your iPod cable at home
    • compatible with optional satellite radio and HD Radio™ tuners
    • inputs: front panel auxiliary and USB inputs
    • outputs: 6-channel preamp outputs (2.5-volt front, rear, subwoofer)
    Other info:

    Hands-on research from the Crutchfield Labs (what are the Labs?)

    Features and Specs
    General
    CEA-2006 Compliant
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    No
    RMS Power Output
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    22 watts
    Peak Output
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    50 watts
    RMS Power Bandwidth
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    20-20kHz
    Preamp Outputs
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    6-channel
    Sub Preamp Outputs
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    Yes
    Switchable Rear Preamp Outputs
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    No
    Preamp Voltage
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    2.5 volts
    Display Color
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    Bluish white
    Key Button Color
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    Blue
    EQ Bands
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    3
    Wireless Remote
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    Yes
    Steering Wheel Control Compatible
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    Adapter required
    Parts Warranty
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    1 Year
    Labor Warranty
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    1 Year
    Expandability
    AUX Input
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    Front and Optional Rear
    USB Input
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    Front
    Memory Card Slot
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    USB memory
    Bluetooth Compatible
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    Built-in
    Satellite Radio Ready
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    Both
    HD Radio
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    Optional
    Navigation
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    ---
    iPod Compatibility
    Full size
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    Classic/5Gen
    Nano
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    Nano6/Nano5/Nano4/Nano3/Nano2/
    Touch
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    Touch4/Touch3/Touch2/Touch1
    Mini
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    No
    iPhone
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    Phone4S/Phone4/Phone3GS/Phone3
    Tuner
    FM Sensitivity
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    11.2 dBf
    European Tuning
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    Yes
    Seek/Scan
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    Seek
    Radio Data System
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    Yes
    Product Research
    What's in the box?

    Download owner's manual

    • AM/FM CD receiver (with 10-amp fuse inserted into the chassis)
    • Sleeve (attached)
    • Face (attached)
    • Trim ring (attached)
    • Wiring harness
    • RC-405 Wireless remote control (with CR2025 3V lithium-battery installed)
    • Face pouch
    • 2 Removal tools
    • 4 Panhead ISO-mount screws
    • 4 Flathead ISO-mount screws
    • Face-fixing screw
    • Instruction Manual (Eng/Fre/Spa)
    • Warranty Card

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

    Overview: The Kenwood KDC-BT648U AM/FM CD receiver features a detachable face, front-panel auxiliary and USB input, and three pairs of 2.5-volt preamp outputs. The KDC-BT648U offers MP3/WMA/AAC playback via CD-R/RW audio discs, as well as connected USB flash memory devices. The Kenwood CD receiver's USB port also supports direct connection of your compatible iPod or iPhone. In addition, The KDC-BT648U features built-in Bluetooth technology for hands-free communication. The head unit also supports HD and Satellite Radio (via optional tuners). For added convenience, the Kenwood KDC-BT648U comes with an IR remote control for wireless operation of the head unit and supports OEM steering wheel controls (via optional adapter). The CD receiver's amplifier is rated at 22 watts x 4 channel RMS and 50 watts x 4 channel peak.

    Display Features
    Audio Section
    Radio Functions
    Disc Playback
    USB/iPod/Aux Connectivity
    Built-in Bluetooth
    Remote Control
    Optional Software

    Display Features

    Detachable Face: The Kenwood KDC-BT648U features a single front loading CD face that detaches from the chassis to deter theft. The head unit includes a cloth pouch for storing the face-plate when detached. A face-fixing screw is supplied for making the face non-detachable, if desired.

    Note: An optional soft face case (142DFC1X, sold separately) can also be purchased for this unit.

    Fluorescent Display: The Kenwood head unit features a 14-segement, 13-character bluish white backlit fluorescent display with blue button illumination.

    Display Illumination/Clock Display: When the unit is in Standby mode, the face/button illumination is "keyed." In addition, while the unit is in Standby mode, you can turn the clock display on or off. When the Clock Display is turned on and the unit is in Standby mode, the Clock Display is also "keyed." Pressing and holding the source button turns the unit off completely.

    Display Dimmer: The display has two brightness settings to adjust the brightness of the display according to the surrounding illumination. You can change this setting within the menu from On or Off.

    Demo Mode: This unit features a Demo mode which can be turned "on" or "off" within the menu.

    Audio Section

    24 Bit D/A Converter: The Kenwood KDC-BT648U utilizes a 24-bit digital to analog converter for superior CD sound quality.

    MOSFET Amplifier: The Kenwood KDC-BT648U is equipped with a MOSFET amplifier. Compared to conventional power supplies, the MOSFET amplification circuit is smaller and more efficient, and it delivers increased power with less distortion and absolutely zero on/off switching noise. More power means louder and cleaner music at higher volumes because you're not pushing the limits of the amplification circuit. The power output specs for the KDC-BT648U are as follows:

    • Full Bandwidth Power: 22 watts RMS x 4 channels (at 4 ohms, 20-20kHz, 1% THD)
    • Maximum Output Power: 50 watts x 4 channels

    Rotary Volume Control: The CD receiver uses a 3-way rotary volume control that increases and decreases the volume of the stereo from 0 to 35. The rotary knob also controls other audio settings such as Balance, Fader, Bass, Mid, Treble and preset EQ settings. In addition, the rotary knob allows you to scroll through and select your music tracks when the Music Search function is activated.

    Volume Offset: The level of each source may be independently adjusted to prevent radical leaps in output volume when switching from one source to another. The available settings range from -8 to 0 (-8 to +8 for Aux source).

    Supreme Setting: When MP3, WMA, and AAC files encoded at a low bit rate (less than 96 kbps, 44.1k, 48kHz) are played, the Supreme Setting function restores their high frequencies so the sound quality is closer to files encoded at a high bit rate. The processing is optimized for the compression format and the bit rate used. When the Supreme Setting is Off, the unit plays the original sound stored in the audio file.

    Speaker Settings: The Speaker Setting function tailors the System Q Sound Control settings according to the type of speakers in your vehicle. You may select a Speaker Setting of "SP Off" (flat), "SP OEM" (for OEM factory speaker systems), "SP 6x9/6" (for systems with 6" and 6"x9" speakers), or "SP 5/4" (for systems with 4" and 5" speakers).

    System Q Sound Control: Eight EQ curves are preset into memory, allowing you to recall the best preset EQ curve for different types of music. Each preset has its own level settings for bass (100Hz), midrange (1kHz), and treble (12.5kHz). You can choose from the following preset EQ curves - Rock, Pops, Easy, Top 40, Jazz, Natural, Game, and User.

    Bass/Treble/Mid Control: The System Q's User Mode features independent Bass (100 Hz), Treble (10 kHz), and Midrange (1 kHz) control from - 8 to +8 dB.

    Bass Boost: The Kenwood CD receiver also features a Bass Boost control that can be set to the following levels - LV1, LV2 or Off.

    Source Tone Memory: This feature allows you to store System Q bass, middle and treble tone settings for each source (CD, Tuner, Aux, and USB).

    6ch/2.5V Preamp Outputs: The KDC-BT648U features front, rear and subwoofer 2.5-volt preamp outputs. The front and rear speaker preamp outputs are balance and fade adjustable. The subwoofer preamp output is non-fading. The front, rear, and subwoofer preamp outputs are fixed to the rear chassis of the head unit.

    Front & Rear High-Pass Filter: The KDC-BT648U features an independent High-Pass Crossover for the front & rear channels when your front & rear speakers are connected by the unit's speaker-outputs or preamp-outputs. You can adjust the high-pass crossover from "Through", 80, 100, 120, 150, or 180Hz. The "Through" selection is a full-range setting. This feature is very helpful when you have smaller-type speakers in the front and larger-type speakers installed in the rear of the vehicle.

    Subwoofer Controls: The Kenwood KDC-BT648U provides the following subwoofer preamp output controls.

    • Low-Pass Filter: The receiver features a built-in Low Pass Filter control for the unit's subwoofer preamp output. You can select from 60, 80, 120Hz, or "Through". The "Through" setting allows your external amplifier's crossover network to do all the filtering for your subwoofer.
    • Subwoofer Phase: You can adjust the phase of the subwoofer output between 180-degrees (Reverse) or 0-degrees (Normal).
    • Subwoofer Level: You can independently control the subwoofer preamp output level from the CD receiver. You select levels between -15 to +15.

    Key Beep: The in-dash head unit provides an audible beep to confirm button operation. This function can be turned On or Off.

    Radio Functions

    AM/FM Tuner: The Kenwood KDC-BT648U features a built-in AM/FM tuner. You can choose one of three tuning modes: Auto 1 (seek tuning), Auto 2 (cycles through and tunes the selected band's preset stations only with each button press), or Manual.

    RDS: The Radio Data System (RDS) feature displays radio broadcast information such as artist, title, and album when listening to compatible AM/FM stations.

    Tuner Presets: The KDC-BT648U's tuner features 3 FM banks (1, 2, 3) and 1 AM bank for storing presets. The Kenwood KDC-BT648U offers two preset modes.

    • Normal: You can store 6 presets for each AM/FM bank giving you a total of 18 FM presets and 6 AM presets (total of 24).
    • Mix: A total of of 6 stations can be assigned to a total of 6 preset buttons, regardless of AM/FM band and connected Satellite Radio tuner. You can recall a preset station without switching between bands.

    Auto Memory Tuning: Not only does the CD receiver's tuner allow you manually enter your desired presets you can choose to have the unit automatically put stations with good reception in the memory banks automatically; this is a handy feature when traveling.

    Direct Access Tuning: You can directly access an AM/FM station by entering in the frequency number using the include wireless remote control.

    Mono Mode: This feature reduces the noise (static) when a stereo broadcast is received as monaural (for FM band only).

    Satellite Radio Ready: There are several options for connecting an optional XM or SIRIUS Satellite Radio receiver to this receiver:

    • SIRIUS Satellite Radio: To receive SIRIUS Satellite Radio, you can connect the optional SIRIUS Universal Vehicle Tuner  and the optional Kenwood Sirius Satellite Radio Interface (package # 700SIRKENW, sold separately); or you can connect the optional Kenwood Sirius Satellite Radio Interface and the SiriusConnect vehicle docking kit (package # 700SIRPKEN, sold separately), along with your compatible SIRIUS Dock & Play receiver.
    • XM Satellite Radio: To receive XM Satellite Radio connect the optional CNP2000UCA XM Tuner and the CNP-KEN1 Kenwood adapter cable (package item number 700XMKEN2).

      Note: A subscription is also required to receive satellite radio programming from SIRIUS or XM.

    HD Radio Ready (with iTunes Tagging): With an optional Kenwood HD Radio tuner (113HR300, sold separately), you will be able to receive digital AM/FM broadcasts from local stations where available. This new technology will significantly improve audio quality and reception, as well as include information such as artist name and song titles or traffic news, viewable on the receiver's display. The Kenwood KTC-HR300 HD Radio tuner(113HR300) is also capable of iTunes tagging. iTunes tagging gives you the ability to tag a song (up to 50) and stores it to a connected iPod. The next time your iPod is connected to iTunes, the tagged songs are displayed with the option to purchase them from the iTunes Store.

    Note: You cannot connect both a Satellite Radio Interface and HD Radio tuner to the head unit.

    Disc Playback

    Disc Compatibility: The unit features a single disc player that will playback CD-Audio, CD-Text, and finalized CD-R/CD-RW audio discs.

    MP3/WMA/AAC Playback: The KDC-BT648U can play MP3 (8-320 kbps), WMA (32-192 kbps), and AAC (8-320 kbps) audio files recorded on CD-ROM, CD-R, and CD-RW discs in ISO9660 Level 1/Level 2, Joliet, Romeo, and Long file name formats. Each disc should have a maximum of 8 directory levels, 50 folders, and 255 files per folder with a maximum of 512 files and folders. During MP3/WMA/AAC playback, the unit displays recorded ID3 Tag (ver. 1.x/2.x) information. The head unit will display up to 60 characters.

    Text Scroll: The KDC-BT648U will display CD text or Audio file text. You can set the text scrolling feature to two different modes (Auto or Manual) to scroll longer titles across the screen.

    Music Search: The Kenwood AM/FM CD receiver features a Music Search feature which allows you to scroll through and select your MP3/WMA/AAC music folders and files, as well as scroll through your audio CD's music tracks using the head unit's rotary knob.

    Direct Music Search: The supplied IR wireless remote control (RC-405) allows you to search for music directly by entering the track number.

    Playback Modes: The Kenwood KDC-BT648U features the following Repeat, Random, and Scan playback modes.

    • Repeat Play: Track, File, or Folder
    • Random Play: Disc or Folder
    • Scan Play: Track or File (plays the first 10-seconds of each music track on a disc or music file in a folder)

    Last Position Memory: If the unit is shut off or switched to the tuner mode while a CD is playing, the next time CD is selected as the source, playback will resume from the point where it left off.

    CD Read: This function sets the method for reading a CD disc. You can choose between two modes.

    • CD1: Automatically distinguishes between audio file disc and music CD when playing a CD, CD-R/RW disc.
    • CD2: When unable to play a special formatted CD, set this function to CD2 to force playing. Some music CD  discs may be unplayable even when set to this mode.

    Off Insert/Eject: A CD disc can be inserted or ejected with the power off. When a disc is inserted with the power off, the unit will automatically power up and begin playback.

    Auto Insert: The CD player will automatically reinsert the disc if it's ejected, but not removed for 20 seconds or more.

    Changer Controls: The Kenwood KDC-BT648U offers connection and control of Kenwood's 10-disc CD-changer (113KDCC719, sold separately).

    USB/iPod/Aux Connectivity

    USB Port: The Kenwood KDC-BT648U features a front-panel USB (1.1/2.0) type-A port that is hidden behind a sliding cover. The USB port enables connection and control of a portable USB mass-storage class device with MP3 (8-320 kbps), WMA (32-192 kbps), and AAC (8-320 kbps) music files. The USB port is compatible with all USB mass storage class devices that support the FAT16 or FAT32 file system. Your USB device should only have a maximum of 8 directory levels, 255 folders, and 255 files per folder with a maximum of 65,025 files and folders. During MP3/WMA/AAC playback, the unit displays recorded ID3 Tag (ver. 1.x/2.x)  information. The head unit will display up to 60 characters. The KDC-BT648U will also charge your connected USB device's battery, when the head unit is powered up.

    Note: You cannot connect a USB device via a USB hub or Multi-Card Reader to this unit.

    iPod/iPhone Direct Connection: The KDC-BT648U's front-panel USB port also acts as an iPod/iPhone high-speed direct connection when used with the optional Kenwood USB Direct Connection Cable (113KCIP102, sold separately) or the USB/iPod cable that comes with your iPod/iPhone. Using either cable allows audio playback, music navigation, information display, and charging of select iPod/iPhone models from the KDC-BT648U.

    iPod/iPhone Audio Playback: The USB connection allows your iPod/iPhone's large music libraries to be loaded instantly to the head unit and sound quality to be maximized through the head unit's 24-bit D/A converter, allowing for a Signal to Noise ratio up to 105dB. The Kenwood head unit supports audio playback of music files and podcasts stored on your iPod or iPhone.

    iPod/iPhone Control: You can choose to control the iPod/iPhone from the head unit or from your iPod/iPhone's clickwheel or touchscreen.

    • Music Browsing: The Kenwood head unit allows you to navigate your iPod's music by Playlist, Artists, Album, Genre, Composer, Song, or Podcast. You can search these categories alphabetically or using a percentage search (0.5%, 1%, 5%, 10%).
    • Playlists: You can create your own custom iPod/iPhone playlist (up to 10 songs) from the head unit.
    • Repeat & Random: The head unit supports Repeat (file) & Random (folder) playback functions of your connected iPod/iPhone.

    iPod/iPhone Display: The KDC-BT648U will display your iPod/iPhone's music file information when you are controlling your iPod or iPhone from the Kenwood head unit. The head unit will display Track number, Elapsed playing time, Artist name, Song title, and Album label. If you choose to operate your connected iPod/iPhone via its clickwheel or touchscreen controls, the KDC-BT648U will not display your iPod/iPhone's music information (the head unit will instead display iPod MODE).

    iPod/iPhone Charging: While connected and the ignition switch is set to ACC or ON, the head unit's USB connection will power and charge your iPod/iPhone.

    Note: If your iPod/iPhone has no initial battery charge, then the unit will not recognize it.

    iPod/iPhone Compatibility Chart: The Kenwood KDC-BT648U is "Made for iPod/iPhone" compatible and supports the following iPod/iPhone model features (as of November 2011):

    iPod/iPhone Model Generation Tested Version Media Type Control Type Display Type Charge
    Audio Video Head Unit iPod/iPhone Song/Artist Text Track Info
    dock connector 3rd N/A N N N N N N N
    clickwheel
    color
    4th N/A N N N N N N N
    mini 1st N/A N N N N N N N
    2nd N/A N N N N N N N
    video 5th 1.3 Y N Y N Y Y Y
    classic 80GB 1.1.2 Y N Y Y Y Y Y
    120GB 2.0.1 Y N Y Y Y Y Y
    160GB 2.0.4 Y N Y Y Y Y Y
    nano 1st 1.3.1 Y N Y N Y Y Y
    2nd 1.1.3 Y N Y Y Y Y Y
    3rd 1.1.3 Y N Y Y Y Y Y
    4th 1.0.4 Y N Y Y Y Y Y
    5th 1.0.2 Y N Y Y Y Y Y
    6th 1.1 PC Y N Y Y Y Y Y
    touch 1st 2.2.1 Y N Y Y Y Y Y
    2nd 4.2.1 Y N Y Y Y Y Y
    3rd 5.0.1 Y N Y Y Y Y Y
    4th 5.0.1 Y N Y Y Y Y Y
    iPhone 2G 3.1.3 Y N Y Y Y Y Y
    3G 4.2.1 Y N Y Y Y Y Y
    3GS 4.3.5 Y N Y Y Y Y Y
    4 5.0.1 Y N Y Y Y Y Y
    4S 5.0.1 Y N Y Y Y Y Y

    Note: Apple iPod/iPhone software updates may change functionality results. If you download a newer software version, you may need to reset the head unit and your iPod/iPhone to regain functionality. If this doesn't work, you may need to revert to the older software version or wait until a newer software update is available.

    Aux In: The unit is equipped with a front panel 3.5mm minijack auxiliary input that can be used to input audio from a portable audio source, such as a portable MP3 player. The KDC-BT648U allows you to select the source type displayed when using the auxiliary input. You can choose from AUX, DVD, Portable, Game, Video, or TV. The Aux input must be turned on to function. The unit has 3 auxiliary input modes.

    • On1: Outputs the sound of the external unit connected to the Aux terminal when switched to the Aux source.
    • On2: Activates the attenuator function when turning on the power with the auxiliary source selected. This prevents the noise when no external unit is connected to the Aux terminal. Turn off the attenuator function when listening to output from an external unit.
    • Off: Disables the selection of the Aux source.

    Rear Auxiliary Input "Ready": The unit already features a front panel auxiliary input, but if you need a second auxiliary input, one can be added to the rear of the unit. When used with an optional adapter, this unit can accept a rear input from an auxiliary source. When the CA-C1AUX adapter (113CAC1AX, sold separately) is used, you cannot connect an optional HD/Satellite Radio tuner to the head unit because the adapter plugs into the DIN changer control connection on the head unit.

    Built-in Bluetooth

    Bluetooth Technology: Bluetooth is a two-way wireless communication system allowing you to make and receive cell phone calls wirelessly from your mobile phone, using the Kenwood in-dash CD receiver. Bluetooth wireless technology operates on a 2.4GHz frequency band within a range of approximately 10 meters (about 33 feet).

    Bluetooth Profiles: The Kenwood KDC-BT648U CD-Receiver features built-in 2.4GHz Bluetooth technology (version 2.0) powered by Parrot. The KDC-BT648U supports Bluetooth hands-free communication. The KDC-BT648U supports the following Bluetooth profiles:

    • HFP (Hands-Free Profile): Hands-free communication with your Bluetooth enabled cellular phone in the vehicle (incoming/outgoing calls supported).
    • HSP (Headset Profile): Provides support for Bluetooth headsets to be used with mobile phones.
    • OPP (Object Push Profile): Phonebook transfer from your Bluetooth enabled mobile phone to the head unit.
    • PBAP (Phone Book Access Profile): Phonebook access from your Bluetooth enabled cell-phone to the head unit.
    • SPP (Serial Port Profile): SPP defines how to set up virtual serial ports and connect two Bluetooth enabled devices.
    • SYNC (Synchronization Profile): The SYNC profile enables synchronization of data information between Bluetooth enabled devices.

    Note: This unit does not support Bluetooth audio music streaming.

    Bluetooth Hands-Free Communication: The head unit supports Bluetooth hands-free communication for your Bluetooth enabled mobile phone. The controls of the KDC-BT648U can be used to dial a number, answer an in-coming call, or end a call. The unit also features an integrated microphone (featuring adjustable gain), so you can carry on your side of the conversation while listening to the caller through your vehicles speakers.

    Pairing: Your Bluetooth enabled mobile phone must be paired with the KDC-BT648U before hands-free operation. You can register up to five Bluetooth enabled cell-phones with the Kenwood head unit (only one paired phone can be used at a time).

    Note: Not all Bluetooth mobile phones will be compatible. Visit http://www.kenwood.com/cs/ce/bt/index.php for a complete list of compatible Bluetooth enabled phones.

    Auto Answer: The KDC-BT648U can be setup to automatically answer an incoming call. You can have the head unit automatically answer a call immediately or after 1-99 seconds.

    Dialing: Using the KDC-BT648U, you can dial a phone number in one of the following ways:

    • Entering a Phone Number: Allows you to directly dial a phone number up to 25 digits from the head unit's control knob or remote control.
    • Speed (Preset) Dialing: Allows you to register up to 6 phone numbers for quick dialing. These can be accessed from the head unit's preset buttons (1-6).
    • Phone Book: You can dial by using the downloaded phone book. You can download phone book data from your cell phone to the KDC-BT648U. Up to 1000 numbers can be stored for each registered cell phone. Each number can be up to 25 digits long and each name can be up to 50 characters long.  Stored phone numbers can be categorized by General, Home, Office, Mobile, or Other. You can search each category of the phone book in alphabetical order.
    • Call Log: The Call Log is a list of calls that have originated from and were received by this unit that you can dial. You can select Outgoing, Incoming, or Missed calls.
    • Voice Dialing: If your mobile phone supports voice recognition, then you can dial out by voice command. Simply speak into the included microphone.  You can register up to 35 voice tags.

    Call Waiting: The KDC-BT648U supports the Call Waiting function, so you can answer another incoming call while suspending the current call you are on. Your compatible cell-phone must also support this feature.

    SMS: You can wirelessly download the short message (SMS) arrived at your cell-phone so that is can be read on the Bluetooth connected Kenwood head unit. Your cell-phone must support SMS for this feature to function. The SMS downloaded to this unit is cleared when this unit is turned off.

    Note: You cannot send text messages using this unit (read only).

    Private/Hands-Free Mode: During a conversation, you can switch between the Private Mode (talking directly on your cell phone) and the Hands Free Mode. 

    Integrated Microphone: The Kenwood KDC-BT648U features an integrated microphone for added convenience, so you don't have to mount an external microphone in your vehicle.

    Note: There is no mic input for adding an external microphone.

    Bluetooth Detailed Settings: The KDC-BT648U offers the following Bluetooth Detailed Settings, so you can configure the unit to suit your needs.

    • Call Beep: You can choose to output a beep from your vehicle's speaker's when a call comes in, or you can turn this function off.
    • Speaker Output: You can select whether the call beep and caller's voice is heard through only the front speakers or all speakers.
    • Mic Gain: Adjusts the volume of the external microphone from -3 to +3.
    • NR Level: Reduces the noises generated by the surrounding environment without changing the mic volume. The NR Level can be set to -2 or +2.
    • EC Level: Adjusts the level of echo cancellation from -2 to +2.

    Remote Control

    Wireless Remote Control: The KDC-BT648U comes with an IR remote control (RC-405) for wireless operation of the head unit. The remote will control Audio, CD, USB, Tuner, and Bluetooth functions. It is powered by a single CR2025 3V lithium-cell battery (supplied).

    • Numeric Keypad: The wireless remote control features a numeric keypad (0-9) which allows direct track access of your music tracks & files (from CD or USB), as well as AM/FM presets. The numeric keypad also lets you manually enter a phone number.
    • Attenuator: The CD receiver features an Attenuator button on the supplied remote control that turns the volume down very quickly with one touch of the button.

    Steering Wheel Remote Compatibility: The head unit also features an OEM steering wheel remote control input wire (blue/yellow) within the included wiring harness that lets you keep your vehicle's factory radio steering wheel remote controls when used with the optional PAC SWI-JACK Steering Wheel Control Interface Adapter (127SWIJACK, sold separately); or the optional Metra ASWC Steering Wheel Control Interface Adapter (120ASWC, sold separately).

    Note: Please consult the Crutchfield Car Selector to see if your vehicle is compatible.

    Optional Software

    Music Editor Compatible: The Kenwood KDC-BT648U supports the PC application, Kenwood Music Editor Lite (ver.1.1). Kenwood Music Editor Lite is a Windows-based desktop software that helps organize, manage and transfer MP3 and WMA music files to your USB devices from your PC. When you playback audio files that have been stored on your USB device using Kenwood Music Editor Lite through this unit, you can search a file by title, album, or artist name using the head unit's Music Search function.

    System Requirements: The Kenwood Music Editor Light (ver.1.1) Windows-based software can be downloaded for free from Kenwood.com to your PC. The Kenwood Music Editor Light is compatible with the following Windows Microsoft Operating Systems.

    • Windows XP Professional, Home Edition SP2 or later (32-bit)
    • Windows Vista (32/64-bit)
    • Windows 7 (32/64-bit)
     
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    Kenwood KDC-BT648U Reviews

    Average Customer Review:

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    1 out of 5

    Garbage

    Written By Anonymous, Arnold, MD on Sunday, December 15, 2013
     
    Garbage Garbage Garbage. Just over a year later and a USB error appears making iPod connectivity useless. Bluetooth option is terrible. The hand controls are non existent.
    Pros:
    Easy to install.
    Cons:
    Difficult to use. Plagued with firmware problems. Bluetooth sounds terrible. Menu layout is not intuitive
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    3 out of 5

    Disappointed

    Written By Ken R, Hanover, PA on Thursday, June 14, 2012
    Crutchfield Customer Review (What's this?)
     
    When seeing Bluetooth and iPod/iPhone listed I expected to be able to stream from the iPhone. With this unit you will only be able to utilize Bluetooth/iPhone together for the purpose of making/receiving phone calls. Streaming of music over BT is not supported. I am planning on removing the unit for a return and making another purchase.
    Pros:
    Crutchfield has been great to deal with. Sound quality is good and install was easy.
    Cons:
    Bluetooth is only for phone, not streaming of music. Interface is a not the easiest to use.
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    4 out of 5

    Absolutely satisfied

    Written By Erin, Atlanta, GA on Tuesday, June 12, 2012
    Crutchfield Customer Review (What's this?)
     
    Great piece of gear. Eons better than my factory radio, that's for sure! The sound is great, the controls are easy to use once you get the hang of it, and the remote control is the bomb! I love it. Some people have complained about the blue tooth, but I've not found it to be really all that bad. It just sounds like you're talking on a speaker phone, which you are. All in all, excellent stereo. It was easy to install and sounds great.
    Pros:
    Sound, controls, looks great, just awesome.
    Cons:
    The one con is that the display is hard to read in the sunlight.
    1 out of 1 people found this helpful
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    1 out of 5

    Bluetooth Fail

    Written By cbeccone, New Mexico on Saturday, March 17, 2012
    Crutchfield Customer Review (What's this?)
     
    Got this to replace an older Pioneer BT7000 which I had sold with a previous vehicle. As usual, shipping was fast, all accessories included and usual Crutchfield attention to detail. Installed easily, fit perfectly in the dash and navigation was much better than the Pioneer unit. Sound is clear and the whole package is great with the glaring exception of the bluetooth connection, which is a complete bust and totally unusable. With the Pioneer, I had a clear phone connection for years but with this one, despite tweaking all of the mic sensitivity settings, there is simply no way to get the party on the other end to hear anything above a whisper, no matter how loud I speak. I can pull off to the side of the road, roll up all the windows and still have to shout to be heard at all on the other end. Basically, it does not work at all.
    Pros:
    great navigation, good sound quality from tuner, cd, ipod or other usb device
    Cons:
    total and complete phone connection fail.
    1 out of 1 people found this helpful
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    5 out of 5

    Great Receiver

    Written By Jorge, McAllen, TX on Sunday, February 12, 2012
    Crutchfield Customer Review (What's this?)
     
    Was looking for factory replacement with AUX and USB, BT was not needed but it came with it. Had read some reviews about the BT being terrible, not the case with me. Turned BT on cell a Motorola Bionic, turn BT on Kenwood got paired fairly quickly next came some downloading to receiver. Receiver displays name of caller and their number the sound is good, still trying to figure txt but have not read manual. Remember I did all this without reading manual just turned on BT on both devices.
    Pros:
    BT works great, sound is awesome and super easy install.
    Cons:
    None so far, if wiring harness was put together already would just make install that much faster, but them I'm just being picky.
    3 out of 3 people found this helpful
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    5 out of 5

    Kenwood still Rocks

    Written By Billy L, Wayne, Mi. on Wednesday, February 01, 2012
    Crutchfield Customer Review (What's this?)
     
    It is very nice, I wish I could change the color of the radio at night just blue is boring.
    Pros:
    It is Load and has great functions to adjust my speakers, trade listening on game mode( very great sound, no I think I need better speakers to go with it)
    Cons:
    It is lighted with blue only( it would be cool to change the color when your mood changes)
    1 out of 2 people found this helpful
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    5 out of 5

    Just what I expected

    Written By Jeff, Tacoma, WA on Tuesday, January 31, 2012
    Crutchfield Customer Review (What's this?)
     
    Just what I expected from Kenwood. I bought this to not only replace but upgrade the Kenwood KDC-HD545U that had been stolen out of my truck. Decided on this model for the BT ability and the ability to add satellite radio. The BT works very well the only time I have any issues is if there is a lot of noise inside the cab of my truck which only happens when I have the windows down driving down the highway. The radio controls are exactly the same as my old radio so figuring it out was pretty easy for me. Hooking up the satellite radio to it was a breeze. Overall it is exactly what I wanted and performs exactly how I expected from a Kenwood.
    2 out of 2 people found this helpful
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    4 out of 5

    Kenwood KDC-BT648U

    Written By Anonymous, new fairfield ct on Tuesday, January 31, 2012
    Crutchfield Customer Review (What's this?)
     
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    3 out of 5

    Bluetooth capability a little frustrating

    Written By Sarcasm3, Souderton, PA on Monday, January 23, 2012
    Crutchfield Customer Review (What's this?)
     
    Chose this unit to replace the stock head unit. Bought it because of its bluetooth compatibility, and the radio text function. Initially disappointed that the clock has to be chosen by pressing a button, rather than being displayed along with the radio text. But the biggest frustration for me is the bluetooth function. I've changed the settings per the instruction, but this unit never does the same thing twice. Sometimes I get in the car, and it interfaces with my phone. Sometimes it doesn't. Sometimes it tries to, and fails, and then my display reads "HF Disconnect" and I have to reset the radio to make it go away. I'm tempted to disable the whole function just because it's making me nuts.
    Pros:
    Inexpensive, decent power, compatible with many of my car's OEM controls
    Cons:
    Buttons very small, hard to locate while driving. Bluetooth funtion is unreliable in my application.
    1 out of 1 people found this helpful
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    5 out of 5

    Great for the Price! Nice Sound

    Written By italianboss316, Los Angeles, CA on Sunday, January 15, 2012
     
    Easy to use! All the Functions you need! Plays everything! Great Bluetooth feature. Works fine if you knowhow to adjust the volume and your phone right...
    Pros:
    BLuetooth function. read you texts and emails as well. Sound and Quality!
    Cons:
    no face plate holder. Thats it!
    3 out of 3 people found this helpful
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    5 out of 5

    Groovy

    Written By Anonymous, Katy, Tx on Tuesday, November 15, 2011
    Crutchfield Customer Review (What's this?)
     
    Installed in my Ford Transit. Sounds great, aux input works, I can charge my phone with the USB port or drive an Ipod from the head unit controls. Intuitive, simple upgrade. Pretty, but not ostentatious. If you want a good head unit with lots of big dog features on a budget, this is it. Only downside is that it doesn't have much flash and the display is rudimentary.
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    4 out of 5

    BT okay, Sound good. Clock Display?

    Written By Nissan Truck, SC on Tuesday, October 18, 2011
     
    Bought a Refurbished Kenwood mainly to get an Ipod Docking port. The cost of a Kit to upgrade the old Nissan radio with a USB input was $85 more than this unit cost. Bluetooth was a bonus feature not originally looking for, but at the price, WHY Not? Installation was easy with only one call to a service tech because one of the wires didn't match the Nissan harness. Also, had to slightly modify one of the trim pieces with a knife for a better fit. Sound is good with low-end factory truck speakers and reception is 2X better. BT took a little fiddling to get decent mic quality...still a little "echoer" on the other end but not bad, nay still need tweaking. Setting up the BT phonebook is tedious and limited to 30 contacts. Can't figure out how to make the Clock display the time so the only way to know the time is go to the Clock Set screen.
    1 out of 1 people found this helpful
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    4 out of 5

    Just like new

    Written By Rg, il on Saturday, October 15, 2011
    Crutchfield Customer Review (What's this?)
     
    just like new came fast an works great kenwood never let's u down ! For the price u can't beat it
    Was this review helpful?    Yes | No
     
    1 out of 5

    Bluetooth is worthless

    Written By shane, maryland on Friday, October 14, 2011
     
    Don't waste your time. No one could hear me at all. Get the Kenwood KDC-X695 instead the Bluetooth is excellent on that one because it has a wired mic. I will have to return this one.
    3 out of 4 people found this helpful
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    3 out of 5

    Forget about phone calls

    Written By Lloyd, Jacksonville, FL on Friday, June 24, 2011
     
    I bought this from my local big box store, which was my first mistake. It cost almost twice as much installed. Good radio, but the Bluetooth performance, which was important to me, was as bad as other reviewers say. I'm swapping it out for a Pioneer and next time I'll buy from Crutchfield, which gave me a good deal and good service on a unit I bought for my other car.
    3 out of 3 people found this helpful
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    4 out of 5

    Kenwood KDC-BT648U

    Written By mstuhr, Nebraska on Friday, June 17, 2011
    Crutchfield Customer Review (What's this?)
     
    The sound is great. The bluetooth option is questionable at best but I may need to mess with the settings to get it tuned in better. For some reason there is a crackle occasionally when in ipod mode, but this goes away when it is unplugged and then plugged back in. For the money it seems to be a good product. The crutchfield service has been outstanding. Thanks!
    1 out of 1 people found this helpful
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    4 out of 5

    Nice Sound..

    Written By Korondo, Southern NH on Wednesday, May 18, 2011
    Crutchfield Customer Review (What's this?)
     
    Great deck for the money. I haven't had much luck with the Bluetooth clarity through
    my cell phone though. I'll see if I can get a minute to clear it up??
    2 out of 2 people found this helpful
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    3 out of 5

    Good Stereo, Not So Good BT

    Written By Scott R, California on Friday, May 13, 2011
    Crutchfield Customer Review (What's this?)
     
    I got this stereo to replace a previous Kenwood I had that went out on me. The
    installation was a breeze and it fired right up with amazing sound through the
    new Kenwood speakers I got along with it. All was good and I had my DROID X
    synced up in no time and the bluetooth was working well. Until I needed to make
    a call, when my first call came in the person on the other
    end couldn't hear a thing I was saying. (I asked them later what it sounded like
    and they said it was like I was driving through a tornado.) I even tried to pull
    off to the side of the road and talk directly into the face of the unit and my
    phone with no luck of improved sound. Overall this a great unit if you just want
    to use it as a stereo but the bluetooth features are lacking and not worth it
    for this unit. However with the help of Crutchfield I will be exchanging it for
    a better unit possibly the BT848U or the X695 or X895.
    4 out of 4 people found this helpful
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    5 out of 5

    Great Features, but beware the BlueTooth function

    Written By Jon M, Big Lake, MN on Monday, May 02, 2011
    Crutchfield Customer Review (What's this?)
     
    Great Stereo all around. Let me break it down:

    Functions: Awesome tweaking ability for true audiophiles, plenty of functions to
    keep you busy. Setup is very easy and the manual's step-by-step instructions are
    nice. The faceplate is readable in direct sunlight, too.

    Power: the speakers sound great! I bought new Kicker 6x9's for the back and Polk
    5's for the front and there is no shortage in power. The radio comes in loud and
    clear, too.

    Blue Tooth: The setup is pretty easy if your phone is compatible (mine was). The
    deck can read your phone book, call list, speed dials, etc. Very cool. THE
    DOWNSIDE: APPARENTLY THE SOUND ON THE CALLER'S END IS VERY
    POOR, THEY HAVE TROUBLE HEARING YOU AND IS VERY ECHO-Y (this may
    have something to do with their voice being played back through the speakers).
    The manual shows several tweaking options for the BlueTooth function, which I
    have yet to play with. Until i can investigate further, i don't use the BlueTooth
    function.

    Everything else works great! This is a great deck! But if I cannot remedy the
    BlueTooth function I could have spent a little less money.
    5 out of 5 people found this helpful
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    4 out of 5

    Jolly good show

    Written By JohnS, Rosamond, CA on Wednesday, April 13, 2011
    Crutchfield Customer Review (What's this?)
     
    This unit replaced a previous Kenwood unit in a 4Runner. This unit is easier to
    use and easier to programme. It gets good radio reception and I really like the
    USB input right in the face of the unit. The Blue Tooth portion of the radio is
    also easier to use and control than the unit it replaced.

    Bad: I have to press "Ok" on my phone every time it syncs with the radio. The
    previous phone I had would do this automatically (so I either have a preference
    not set right, or it's my phone). Only other thing is that the volume knob is
    smooth. This makes it so you have to put a little grip on it to turn it (dumb
    complaint I know). Previous unit had rough edge making it easier to turn, but
    controls on that radio were much more complicated.
    1 out of 1 people found this helpful
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    2 out of 5

    Love Hate Relationship

    Written By TomC, Boston, MA on Thursday, April 07, 2011
    Crutchfield Customer Review (What's this?)
     
    First I loved it. Great radio reception, actual buttons to instantly select the station I wanted. Awesome iPod connectivity (never used the CD player). Then I set up the Bluetooth - very poor directions. Why do I need a PIN? Finally got it synced and it tested OK when parked in the garage with engine off. Next day while driving my wife calls. She can't hear me, only road noise and a bad echo. I'm driving a 2000 Range Rover. It has a fairly quiet ride. I try the mic adjustments. NO help. Frustration sets in. I have to turn it off to use my phone. The faceplate-mic is worthless. There is no jack for a wired mic. Returned it after 3 days for KDC-X695 which is the exact radio only with a wired mic. Now I totally love my Kenwood. Crutchfield was great - free shipping both ways for my return.
    3 out of 3 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    So far so good

    Written By twnboarder, ND on Monday, April 04, 2011
    Crutchfield Customer Review (What's this?)
     
    There are a lot of good options with this deck, and for the price I think it's a great
    value, especially with the built-in bluetooth. I've installed nothing but Kenwood
    decks in the last of my 3 cars and I've been very happy with them based on the
    price and performance. This is a very clean deck, easy to use, and has many
    useful options for tweaking sound based on the type of music you listen to, and
    the speakers you have. I would definitely buy this again. I didn't give it a 5 star
    review as it's not perfect in every way, but I would recommend this to a friend.
    Also I'm working on getting the bluetooth to sound good, I've been told by others
    that with the stock settings, it was hard to hear me over the road noise, but my
    car is a bit noisy and I hadn't changed any bluetooth settings yet, and there are
    plenty of settings to mess with.
    Was this review helpful?    Yes | No
     
    3 out of 5

    Programing issues

    Written By JimS, caldwell nj on Monday, April 04, 2011
    Crutchfield Customer Review (What's this?)
     
    Great radio for the price. Blutooth works great as well. Installed myself with no problems. Was disappointed with the Preset memory. You can set your seek mode to search presets only, however, it goes back to channel search everytime you turn the radio off, or change the band. Kinda dumb to have a SETTING for that then...... Called tech support, figured I was doing something wrong, turns out I was right. Thats how its Programmed???
    Was this review helpful?    Yes | No
     
    1 out of 5

    Disapointed

    Written By Vince, San Jose CA on Thursday, March 31, 2011
    Crutchfield Customer Review (What's this?)
     
    Very disapointed. The bluetooth mic was horrible. Does not stream music over bluetooth. The display on mine would blink only sometimes. With Crutchfield's awesome customer service I was able to exchange it for a Sony. Much happier
    1 out of 1 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    Kenwood KDC-BT648U

    Written By Ray, Houston on Monday, March 28, 2011
    Crutchfield Customer Review (What's this?)
     
    Nice Stereo, blue tooth mic needs improving.
    Was this review helpful?    Yes | No
     
    4 out of 5

    Great Sound at a reasonable price

    Written By mrmuski, Pittsburgh, PA on Wednesday, March 23, 2011
    Crutchfield Customer Review (What's this?)
     
    Replaced a factory radio in a GM Envoy and wow, what a difference. The
    KDC-BT648U sounds great. For a low priced system, I couldn't be more pleased
    with the ease of installation and use. I would recommend this unit to anyone who
    doesn't want to sink a lot of money into a new stereo. Easy on the wallet and
    easy on the ears. The instructions for installation were right on the money and
    even a cave man could do it.
    2 out of 2 people found this helpful
    Was this review helpful?    Yes | No
     

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