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USB device compatibility information

Be sure to read the supplied instruction manual before using the USB receiver.

Available USB devices

  • USB devices whose maximum current consumption is
    500 mA or less.
  • USB devices belonging to the USB mass storage class*.
    *"USB Mass Storage Class"
    USB devices that the PC can recognize as an external storage without using any special driver or application software.
    (Contact the sales agent as to whether your USB device conforms to the USB mass storage class.)
    Using an unsupported USB device can result in abnormal playback or display of the audio file. Even if you use the USB device conforming to the above specs, audio files cannot be played normally depending on the type or condition of the USB device.
  • Specifications of USB devices may change by manufacturers matter, Therefore USB devices may not operate normally depending on the change made to the specifications.
  • USB devices with the same model number may have different specifications depending on the sales territory.


USB standard USB 1.1 / USB 2.0
Speed Full speed(Max. 12Mbps)
USB class Mass Storage class(MSC device)
USB subclass SCSI
Protocol Bulk Only
Current supply Max. 500mA
File system FAT16/FAT32*

* Unsupported formats must be converted to FAT16 or FAT32 before recording.


Maximum number of folder layers 8 layers
Maximum number of files* 15,000 files
(Max. 4,096 files/folder)
Maximum number of folders* 500 folders

* The number of files/folders may be less than listed above depending on the number of characters and the specifications of your USB device.

Example:When the average number of characters of a file/folder name is 45, a maximum of 15,000 files can be stored.

  • Since the following folder names are reserved for the internal specifications of the USB receiver, do not use them as the folder names of the USB devices used with the USB receiver.
    "mcd" , "mCd" , "mcD" , "mCD" , "Mcd" , "MCd" , "McD" ,"MCD"


Not compatible(The files with copy protection cannot be played.)
[Multi Partition] Not compatible *

* Some USB devices may have multiple partitions that will be invisible on Windows OS.

For the specifications of your USB device, contact the sales agent of the USB device.

Partition of the USB device

While using the USB device, virtual folders are created to control the partition in the USB device. These folders appear in the first level (root) directory as "#:" . "#" is an alphabet to identify each partition. Even when the USB device does not have partition, the "A:" folder is created, and audio files are
controlled inside this folder.

Playing order of the audio file

When a USB device is used, files are played in the orders which they have been copied. In some PC environments, you can assign sequential numbers to files by copying them on a folder basis after entering "00" to "99" at the beginning of file names.

The connections of the USB device

[About Extended Connection of the USB Device]

When connecting the USB device, usage of the CA-U1EX (an option scheduled to be sold in May) is recommended.

* Normal playback is not guaranteed when a cable other than the USB compatible cable is used. Connecting a cable whose total length is longer than 5 m can result in abnormal playback.

  • You cannot connect a USB device via a USB hub.
  • When using a memory device, be sure to use a USB card reader with a single slot. A USB card reader with multiple slots may fail to recognize the memory device.
  • When using a USB card reader, be sure to put a memory device into the reader before connecting it to the USB receiver.
  • If the USB mode is selected with no USB device connected, it will take about 20 seconds for the receiver to detect that no USB device is connected.
  • When connecting a USB device to a 2DIN system, use the supplied USB cable.
  • Install the USB device in the place where it will not prevent you from driving your vehicle properly.

Notification of the supported CODEC

The scope of application for compression formats that USB devices can use are disclosed.

For Americas Market

>KDC-X890 >KDC-X590 >KDC-MP832U >KDC-MP632U
>KDC-MP532U >DPX701 >DPX501

For European Market

>KDC-W7534U >KDC-W6534U >KDC-W5534U >KDC-W534U
>DPX701U >DPX501U

For Asian Market

>KDC-X9533U >KDC-W7533U >KDC-MP5033U >DPX-MP7090U


  • No USB device comes with the USB receiver. You need to purchase a commercially available USB device.
  • Take backups of the audio files used with the USB receiver.
    The files can be erased depending on the operating conditions of the USB device. We shall have no compensation for any damage arising out of erasure of the stored data.
  • Audio files cannot be played depending on the USB device type or the recording condition.
  • The playable MP3/WMA/AAC file and the media format has the following limitation. The audio file, which is not conforming to the specification, may not play normally or the file and folder names may not be displayed correctly.
  • Do not leave the USB device in the vehicle for a long time. It can deform or damage due to direct sunlight, high temperature, etc.
  • Normal operation and power supply are not guaranteed for some USB devices.
  • The USB Device Operation Verification Results List may contain discontinued products. Contact the sales agent to confirm whether each product is still on the market.
  • Specifications described in this document are subject to change without notice.
  • Duplication (recording), distribution, and broadcasting of copyrighted works such as songs without the permission of the copyright owner are prohibited by the copyright law except for personal use.
  • Microsoft and Windows are trademarks or registered trademarks of Microsoft Corporation in the US and other countries.
  • Use of iPod and iTunes is permitted only when uncopyrighted materials or the materials legally allowed to be reproduced or played are reproduced or played for personal use. Infringement of copyright is banned by the law. Apple, iPod, and iTunes are registered trademarks of Apple Computer, Inc. in the US and other


USB Device Operation Verification Results List

Category Not applicable
USB device
Flash Memory Memory Player *1
HDD Player *1 Card Reader
As of September,2006
Category Maker Model Capacity
  • The verification result may vary depending on the individual specificity of USB device.
  • This list indicates the results of verification of operation of some USB devices (not all USB devices) conforming to our specifications and functional requirements.
  • The playback operation was verified using the files transferred to the USB device with Windows Explorer. (The playback status depends on the USB device status.)

    *1 This verification of operation was conducted in the mass storage mode. Only the files in the areas belonging to the mass storage class can be played. For how to enable use of a file as the file belonging to the mass storage class, refer to the description of the setup procedure of each player. Some players cannot be used on the mass storage class.
  Copyright 2006 KENWOOD Corporation