Amazon Fire TV Cube Firmware Update Fixes Some (but not all) Lossless Audio Passthrough Problems

In my original review of the 3rd Generation Amazon Fire TV Cube I said that Amazon’s top of the line streamer is not something I can recommend for enthusiasts due to issues with lossless audio passthrough in Plex and similar apps.

Enthusiasts running Plex typically stream rips of Blu-Ray movies with lossless audio tracks containing Dolby ATMOS True HD audio or one of the many flavors of DTS. The only name-brand box that does it perfectly is the aging Nvidia Shield so many enthusiasts were hoping that Amazon would offer something to meet that need as well.

And then I got a DM from my friend Elias Saba at AFTVNews.com who passed along this story about those issues being addressed in a firmware update. So, I bought another box (I sold my original one to a viewer) and posted this followup video to see if they got it fixed.

The good news is that Dolby TrueHD ATMOS audio is passing through correctly now. The bad news is that no flavor of DTS audio is passing through and it looks like Dolby Vision support for enthusiast media that was working before is no longer working. All of my titles defaulted to HDR10 even with an embedded Dolby Vision track. Dolby Vision continues to works fine in streaming apps which is probably 99% of this product’s audience.

I am going to hold onto my Cube though as it appears Amazon is trying to address this enthusiast need. As new firmwares come down I’ll continually test things to see if anything changes. Stay tuned!