WAIT - Read the Required Files section before downloading this file.

Required Downloads

Unless stated otherwise, the file listed below must be installed BEFORE the STR-DA6400ES Firmware Version 1.071 in order for it to work properly. If more than one Required file is listed, install them in the order presented on this page.

This update is required if your current firmware version is 1.061 or lower.

Install this software if it's not already installed on your computer and you do not have the ES Utility CD.

Applicable Models

IMPORTANT: This file is only for use with the models identified. Not all models are sold in all countries.

This information is for the following models:

  • STR-DA6400ES

About this download

Benefits and improvements

This utility updates the firmware to version 1.071 which resolves an issue where the audio may dropout when playing some DVD or Blu-ray Disc® titles.

System Requirements

Operating Systems

  • Windows Vista®
  • Windows Vista® 64-bit
  • Windows® 7
  • Windows® 7 64-bit
  • Windows® XP

File Info

File Name

  • A64U_1071.zip

File Version

  • 1.071

File Size

  • 14.45 MB

Release Date

  • 02-14-2012

Download & Install


  1. On the remote commander, press the "GUI MODE" button to display "GUI MODE OFF" in the display window of the receiver.
  2. On the remote commander, press the "MENU" button, then press the up/down arrow () buttons to select "System Settings", and then press the enter () button.
  3. Use the up/down arrow () buttons to select "VERSION x.xxx".
  • IMPORTANT: Firmware version 1.062 is required to install this update.
  • If your firmware version is 1.061 or lower, please use the link in the "Required Files" section on the right to download and install the STR-DA6400ES Firmware Update version 1.062.
  • If your firmware version is 1.062, please continue with the installation.
  • If your firware version is 1.071 or higher, your receiver does not need this update.

  • A compatible computer with an active Internet connection.
  • Network LAN cable to connect the receiver to the network.
  • Supplied CD with ES Utility software.
    Note: If you do not have the ES Utility CD, please use the link in the "Required Files" section on the right to download and install the software. to your computer. Please refer to the ES Utility installation procedures below for additional details.
  • Supplied remote commander.
  • TV connected to the receiver.

  1. WARNING!! Do not power off the receiver or disconnect the network cable during the firmware update process. Doing so may cause may cause a malfunction.
  2. To ensure that no other program interferes with the installation, save all work and close all other programs. The Taskbar should be clear of applications before proceeding.
  3. Download the A64U_1071.zip file to a temporary or download directory (please note this directory for reference).
  4. Connect the receiver to your network using a network LAN cable.
  5. Ensure the receiver is connected to the TV.
  6. Power on the receiver and wait 30-50 seconds for the U-com communication.
  7. On the remote commander, press the "GUI MODE" button to show "GUI MODE ON" in the display window.
  8. Ensure the TV is powered on. The menu is displayed on the TV screen.

    Note: If your receiver has already been configured to connect with your home network, please skip to step 13.
  9. On the remote commander, use the up/down arrow () buttons to select Settings, Network, Network Setup.

    Network Setup selection
  10. At the "Network Setup" menu, select Internet Setup.

    Internet Setup selection
  11. At the "Internet Setup" screen, select Connect Automatically(DHCP).

    Network Settings DHCP selection
    The message "Connecting... Please wait." may appear.
  12. When the receiver has successfully connected to the network, select "Finish" and press the enter () button.
  13. On the remote commander, use the up/down arrow () buttons to select Settings, System, System Update.

    Settings Setup selection
  14. At the "Select the update service" menu, select "PC update" and press the enter () button.
  15. At the "Are you sure you want to update the firmware?" message, select "Start".
  16. After 15 seconds, the "PC update" window will appear.
    • IMPORTANT: Do not power off the receiver or disconnect the network cable during the firmware update process. Doing so may cause may cause a malfunction.
    • It may take 30 minutes to complete the update.
  17. On the computer, double-click the ES Utility icon.
  18. At the "ES Utility - Select AV Receiver" screen, double-click the icon for your receiver.
  19. At the "ES Utility" screen, move the scroll bar on the left to select System.

    Select System selection
  20. At the "System Settings" screen, click the Browse button to locate and select the A64U_1071.zip file previously downloaded.
    Note: If the "Browse" button does not appear, please ensure that the previous steps using the TV menu to configure the System setup and selecting System Update on the TV has been properly completed.

    Start Update selection
  21. With the A64U_1071.zip file selected, click the Start Update button.

    Settings Setup Browse selection
  22. At the "Start Update" screen, click "Yes" to start the update process. This update takes 15-30 minutes to complete.
    Note: The MULTI CHANNEL DECODING lamp on the front panel of the receiver flashes while the update is in progress. The flashing will disappear after the update is complete.
  23. After the update completes, click the Exit button.

    Exit selection
  24. Power off the receiver and disconnect from the computer.

The firmware software update is complete.

Note: If the update has not been completed successfully, please check the following for a possible solution:

  1. Please confirm that the correct model (STR-DA6400ES)) and update file (A64U_1071.zip) were selected and used.
  2. Please ensure that the ES Utility was not blocked by the Windows® firewall. Use the firewall settings to add the ES Utility as an exception. (Refer to the operation instructions, Windows Help, or the Microsoft® web site for details).
  3. Please ensure that the ES Utility was not blocked by a third-party firewall. Use the firewall settings to add the ES Utility as an exception or temporarily disable the firewall from blocking the ES Utility. (Refer to the third-party firewall instructions or web site for details).

  1. On the remote commander, press the "GUI MODE" button to display "GUI MODE OFF" in the display window of the receiver.
  2. On the remote commander, press the "MENU" button, then press the up/down arrow () buttons to select "System Settings", and then press the enter () button.
  3. Use the up/down arrow () buttons to select "VERSION x.xxx". This will display the current version information for the receiver.

Questions & Answers


  • The ES Utility software is required to perform the firmware update. Follow the steps below to install the ES Utility software on your computer:
    Note: It is not necessary to install the ES Utility software if you have previously install this utility.
    1. Power on your computer and login as administrator or with an account with administrator rights.
    2. To ensure that no other program interferes with the installation, save all work and close all other programs. The Taskbar should be clear of applications before proceeding.
    3. Insert the the supplied ES Utility CD into your CD-ROM drive.
    4. The installation launcher automatically starts and displays the Software Setup screen.

      Notes:
      • If the installation launcher does not start, navigate to the CD-ROM files and double-click the "SetupLauncher.exe" file.
      • If you do not have the ES Utility CD, please use the link in the "Required Files" section on the right to download and install the software. to your computer, open the downloaded folder, and then double-click the "SetupLauncher.exe" file.
    5. At the "Welcome to the Software Setup" screen, read the agreement, then, if you agree, click "I accept the terms of the license agreement", and then click "Next".
    6. At the "Software Setup" screen, under "Software" click the ES Utility icon.

      ES Utility icon selection
    7. At the "Software Setup" screen, under "ES Utility" click "Install".
    8. At the "Welcome to the ES Utility Installer" screen, click "Next".
    9. At the "Select Type" screen, select "Custom", and then click "Next".
    10. At the "Choose a Destination Folder" screen, click "Next".
    11. At the "Add a desktop shortcut" screen, select "Add a shortcut to the desktop", and then click "Next".
    12. At the "Install the program" screen, click "Install".
    13. At the "ES Utility was successfully installed" screen, click "Finish".
    14. The ES Utility software is installed and the ES Utility icon is placed on your desktop.