Teradek Bolt 4K

Teradek Bolt 4K firmware

Teradek · Bolt 4K · Video

Latest firmware for the Teradek Bolt 4K is v4.5.1 (October 6, 2026).

Changelog

Bolt 4K firmware changelog

  1. v4.5.0 v4.5.1 Added SONY cinema camera metadata support, fixed ALEXA metadata and LUT loading.

  2. v4.4.10 v4.5.0 Extended SDI metadata support for SONY cameras; fixed ALEXA 35 metadata transmission.

  3. v4.4.9 v4.4.10

  4. v4.4.8 v4.4.9

  5. v4.4.7 v4.4.8

  6. v4.4.6 v4.4.7

  7. v4.4.5 v4.4.6

  8. v4.4.4 v4.4.5

  9. v4.4.3 v4.4.4

  10. v4.4.2 v4.4.3

Firmware history

  1. Version 4.5.1 Latest Released Oct 6, 2026 First seen Oct 7, 2026

    Added SONY cinema camera metadata support, fixed ALEXA metadata and LUT loading. — summary by updatemystuff.com

    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.5.1

    Components

    • Controller: 2.38 (LT/XT), 2.4 (HDMI only)
    • TX Vide​o Processor: 1.30.0 (XT), 1.14.0 (LT)
    • RX Video Processor: 1.31.0 (XT), 1.15.0 (LT)
    • Radio: 7.8.21 (TX), 7.8.20 (RX)

    New Features

    • Added support for extended SDI metadata for SONY cinema cameras

    Changes and

    Improvements

    • None

    Bug Fixes

    • Fixed ALEXA 35 SDI metadata transmission​, some fields were not always transmitted correctly
    • 3D LUTs could not be loaded on newer Bolt 6 LT RX devices
    Release notes & download
  2. Version 4.5.0 Released Sep 22, 2026 First seen Sep 23, 2026

    Extended SDI metadata support for SONY cameras; fixed ALEXA 35 metadata transmission. — summary by updatemystuff.com

    Show release notes

    Teradek Bolt 6/​Bolt 4K Firmware Version 4.5.0

    Components

    • Controller: 2.37 (LT/XT), 2.4 (HDMI only)
    • TX Video Processor: 1.30.0 (XT), 1.14.0 (LT)
    • RX Video Processor: 1.31.0 (XT), 1.15.0 (LT)
    • Radio: 7.8.21 (TX), 7.8.20 (RX)

    New Features

    • Added support for extended SDI metadata for SONY cinema cameras

    Cha​nges and

    Improvements

    • None

    Bug Fixes

    • Fixed ALEXA 35 SDI metadata transmission, some fields were not always transmitted correctly
    Release notes & download
  3. Version 4.4.10 Released Jun 22, 2026 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.4.10

    Components

    • Controller: 2.37 (LT/XT), 2.3 (HDMI only)
    • TX​ Video Processor: 1.29.0 (XT), 1.13.0 (LT)
    • RX Video Processor: 1.30.0 (XT), 1.14.0 (LT)
    • Radio: 7.8.21 (TX), 7.8.20 (RX)

    New Features

    • None

    Changes and Improv​ements

    • None

    Bug Fixes

    • Screen tearing/artifacts could occur when using 1080i video formats
    Release notes & download
  4. Version 4.4.9 Released May 4, 2026 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.4.9

    ​Components

    • Controller: 2.37 (LT/XT), 2.3 (HDMI only)
    • TX Video Processor: 1.29.0 (XT), 1.13.0 (LT)
    • RX Video Processor: 1.30.0 (XT), 1.14.0 (LT)
    • Radio: 7.8.21

    N​ew Features

    • None

    Changes and

    Improvements

    • None

    Bug Fixes

    • Bolt app was failing to update device settings
    • Device names could be listed twice when pairing with app
    Release notes & download
  5. Version 4.4.8 Released Jan 16, 2026 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.4.8

    Components

    • Controller: 2.36 (LT/XT), 2.3 (HDMI only)
    • TX Video Proces​sor: 1.29.0 (XT), 1.13.0 (LT)
    • RX Video Processor: 1.30.0 (XT), 1.14.0 (LT)
    • Radio: 7.8.20

    New Features

    • Added 2K DCI output support

    Changes and

    Improvements

    • None

    Bug Fixes

    • AC​E 750 overheat warning was activating at lower than necessary temperatures
    Release notes & download
  6. Version 4.4.7 Released Aug 18, 2025 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware ​Version 4.4.7

    Components

    • Controller: 2.36 (LT/XT), 2.3 (HDMI only)
    • TX Video Processor: 1.29.0 (XT), 1.13.0 (LT)
    • RX Video Processor: 1.29.1 (XT), 1.13.1 (LT)
    • Radio: 7.8.20

    New Features

    • Added input/output range settings to RX
    • Added 1D LUT support to Bolt 4K and Bolt 6 XT RX

    Changes and

    Improvements

    • BlackMagic record flags are now detected/transmitted for fan c​ontrol

    Bug Fixes

    • TX status could be stuck at PLEASE WAIT when only DFS frequencies are enabled
    • NOTE: after disabling non-DFS frequencies, settings may take up to 1 minute to take effect
    Release notes & download
  7. Version 4.4.6 Released Mar 4, 2025 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Fi​rmware Version 4.4.6

    Components

    • Controller: 2.35 (LT/XT), 2.2 (HDMI only)
    • TX Video Processor: 1.28.7 (XT), 1.12.5 (LT)
    • RX Video Processor: 1.28.9 (XT), 1.12.8 (LT)
    • Radio: 7.8.20

    New Features

    • None

    Changes and

    Improvements

    • None

    Bug ​Fixes

    • Bolt LT receivers would sometimes incorrectly report No Video and output black screen<br>
    • Radios would reset after being powered on and linked for a long time (20-30 days)
    Release notes & download
  8. Version 4.4.5 Released Dec 5, 2024 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.4.5

    Components

    • Controller: 2.35 (LT/XT), 2.2 (HDMI only)
    • TX Video Processor: 1.28.6 (XT), 1.12.4 (LT)
    • RX Video Processor: 1.28.7 (XT), 1.12.6 (LT)
    • Radio: 7.8.20

    New​ Features

    • Added 5/6GHz support for Bolt 6 in Australia region

    Changes and

    Improvements

    • Changed Static Video Optimization default setting to disabled
    • Changes to OSD name are now reflected without unpairing and re-pairing devices

    Bug Fixes

    • HDR metadata was not transmitted, output on RX HDMI
    • If pairing failed, unpaired RX would display 'No Link' instead of 'Not Paired'
    • Bolt LT HDMI TX was stu​ck at 5965 MHz when fixed frequency is enabled in U-NII-5 band
    • 3D LUT was not applied to RX correctly when sent via Bolt Manager
    Release notes & download
  9. Version 4.4.4 Released Sep 5, 2024 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.4.4

    Components

    • Controller: 2.35 (LT/XT), 2.2 (HDMI only)
    • TX Video Processor: 1.28.6 (XT), 1.12.4​ (LT)
    • RX Video Processor: 1.28.7 (XT), 1.12.6 (LT)
    • Radio: 7.8.20

    New Features

    • Added 5/6GHz support for Bolt 6 in Australia region

    Changes and

    Improvements

    • Changed Static Video Optimization default setting to disabled
    • Changes to OSD name are now​ reflected without unpairing and re-pairing devices

    Bug Fixes

    • HDR metadata was not transmitted, output on RX HDMI
    • If pairing failed, unpaired RX would display 'No Link' instead of 'Not Paired'
    • Bolt LT HDMI TX was stuck at 5965 MHz when fixed frequency is enabled in U-NII-5 band
    • 3D LUT was not applied to RX correctly when sent via Bolt Manager
    Release notes & download
  10. Version 4.4.3 Released Jun 13, 2024 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.4.3

    Components

    • Controller: 2.34 (LT/XT), 2.1 (HDMI o​nly)
    • TX Video Processor: 1.28.3 (XT), 1.12.1 (LT)
    • RX Video Processor: 1.28.2 (XT), 1.12.2 (LT)
    • Radio: 7.8.17

    New Features

    • Added support for Bolt 6 LT internal antenna models, additional ACE 750 hardware versions

    Changes and

    Improvements

    • N​one

    Bug Fixes

    • ARRI extended metadata was not output when using UHD formats
    Release notes & download
  11. Version 4.4.2 Released Mar 5, 2024 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.4.2

    Components

    • Controller: 2.33 (LT/XT), 2.1 (HDMI ​only)
    • TX Video Processor: 1.28.3 (XT), 1.12.1 (LT)
    • RX Video Processor: 1.28.1 (XT), 1.12.1 (LT)
    • Radio: 7.8.17

    New Features

    • NOTE: This firmware requires Bolt Manager 3.7.0 or later
    • Added U-NII-5 (6GHz) support for Japan Indoor region

    Changes and

    Improvements

    • Improved TX frequency scanning
    • Improved RED timecode/record flag transmission reliability

    Bug Fixes

    • SDI record flags and timecode were not being transmitted in ​firmware package 4.4.1
    • Pairing failed to start if TX was in Searching Frequency state
    • TX and RX would fail to link if left in standby state for multiple (6+) hours
    • Some Bolt models advertised incorrectly as Bolt 4k 750 over Bluetooth
    • Changing OSD name via mobile apps did not work reliably
    • Fixed TX 4k60 pattern generator for Bolt 4k/6 XT
    Release notes & download
  12. Version 4.4.0 Released Nov 9, 2023 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.4.0

    New Features

    • NOTE: This firmware requires Bolt Manager 3.7.0 or later
    • Added support fo​r additional hardware revisions

    Changes and

    Improvements

    • None

    Bug Fixes

    • Fixed audio stuttering/drops with some video formats
    • TX Loopout audio was out of spec, did not work with some monitors
    • Front panel could fail to read radi​o settings/statuses on start up
    • Antenna test sometimes failed to start
    • Scene optimization option could not be changed via Bolt app
    Release notes & download
  13. Version 4.3.4 Released Sep 8, 2023 First seen Jul 11, 2026
    Show release notes

    Teradek Bolt 6/Bolt 4K Firmware Version 4.3.4

    NOTE: All device radios must be updated before use, including standalone Bolts and SmallHD monitor modules

    New Features

    • Added U-NII-5 (6GHz) support for Europe
    • Added static scene optimization option to reduce noise for some video content
    • Added antenna self test
    • Added pattern generator to TX - generates video at TX to enable testing of video transmission and loop out

    Changes and

    Improvements

    • Temperature and voltage info now updates dynamically
    • Background color men​u now has a 'Video off' option to disable output when no video is received
    • 5GHz/6GHz band is now set to match TX when pairing RX devices
    • 5GHz/6GHz band is now set to match last detected TX band when switching between TX devices at the RX

    Bug Fixes

    • Video colorspace was transmitted incorrectly by Bolt 4K/6 TX monitor modules
    • Video output sometimes failed to initialize for TX monitor modules
    • Video output could sometimes display RECEIVING VIDEO without displaying real video or the video format info
    • RX with multiple paired TXs could sometimes switch to a different TX on power up
    • Applying Settings could show unnecessarily after modifying settings or pairing
    • Bandwidth status was reported incorrectly after changing video​ quality settings
    • HDMI sources were sometimes not detected if connected before powering Bolt TX
    • System would not link in fixed frequency if congestion was detected
    • Fixed some rare cases where TX and RX might not link on start up
    • Fixed 10 bit HDMI output on Bolt 6 XT RX
    • Fixed colorimetry info transmission when using HDMI at TX and RX
    Release notes & download

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