Firmware Update


FENRIS A4 | 24.01.2022
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FENRIS A5 | 24.01.2022
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FENRIS A55 | 24.01.2022
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  • Removed noise gate on all inputs
  • Fixed muting issue on phono input
  • Greatly improved sound tuning on A5 and A55
  • Improved gain on A55
  • Fixed a volume bug when switching between Bluetooth and HDMI ARC
  • Fixed disabling and enabling auto power up/auto power down not working properly
  • USB power now also works in standby

To update the speakers, please do the following:

  1. Unzip the file and put the "ota.bin" file on an empty USB drive (MAX 32 GB - formatted as FAT32)*. Remember to "eject" it properly before removing it from the computer
  2. Plug it into the USB port on the back of the speaker
  3. Turn on the speaker and hold the mute-button for 8 seconds
  4. The LED on the speaker will now start blinking to indicate it is updating
  5. Once it has stopped blinking, please unplug the power cable, disconnect the USB drive and wait 5 seconds before turning on the speaker again. It's now updated!

If you have any further questions, please do not hesitate to contact our support team at