WiiM Ultra Firmware v5.2.725339 Update - Aug 5, 2025

Please review the WiiM Ultra update release notes below. If you encounter any issues, feel free to reach out to us. This firmware update is being rolled out in stages, with devices updating sequentially over the next few days.

5.2.725339 (In Progress)​

Release date:

8 / 5 / 2025

What's New:

1. Room Correction & EQ Integration: Room Correction and EQ now work together to provide an optimized listening experience. Learn More
2. Stabilized Wi-Fi Connection: Enhanced connection reliability, especially for mesh network environments.
3. Screen Enhancements:
   • Corrected highlight behavior for Local Radio and Recently Played.
   • Expanded the tap area for easier Preset selection.
   • Ensured full display of Presets and Recently Played content.
4. Amazon Music: Bitrate information is now displayed when streaming Amazon Music Prime.
5. Sub Pro Intergartion: Improved pairing experience and overall functionality when using the Sub Pro.

Bug Fixes:

1. Alarm Fixes:
   • Resolved an issue where weekly alarms occasionally failed to trigger.
   • Fixed a bug where only the default tone played for Pandora alarm.
2. Dolby Audio Fixes:
   • Fixed no-sound issues when playing Dolby audio in multiroom setups.
   • Corrected volume balance behavior for Dolby audio.
3. USB Indexing Fix: Corrected garbled character display for Chinese.
4. USB Output Fixes:
   • Resolved no-sound issues after reconnecting a USB DAC device when using Google Cast, TIDAL Connect, Spotify Connect, or Qobuz Connect.
   • Fixed audio stuttering when playing at 44.1kHz or 48kHz sample rates.
5. Playing Status: Corrected the playback status indicator when no music is playing.
6. Qobuz: Now displays the correct artist name in the app during playback.

 

[SKApretto71]

If you don't want the latest FW you should block the Wiim device from the Internet.
If you don't do that they will push it out to you at some point.

I do want it, just wondering if I need first to get the one offered now and then the latest (out today) when available here in Europe, or just defer updates (on the app: "not now") to save one cycle.

 

[Machiavelli]

but blocking the internet would mean castrating the wiim of its streaming services possibilities and only being able to play locally stored music. or am I making a serious fallacy?

 

[CliffyBC]

but blocking the internet would mean castrating the wiim of its streaming services possibilities and only being able to play locally stored music. or am I making a serious fallacy?

You are correct sir, it does "castrate" it's streaming capabilities. I block all new firmware until the folks on this forum have ironed out all the snags and bugs that it contains. When I'm sure it OK, I then allow Internet access and get the new firmware.
As 90% of my listening is from a plex server located within my home network or via my TV thru HDMI it's no big problem for me but I accept it would be for a lot of people.

 

[hgo58]

You are correct sir, it does "castrate" it's streaming capabilities. I block all new firmware until the folks on this forum have ironed out all the snags and bugs that it contains. When I'm sure it OK, I then allow Internet access and get the new firmware.
As 90% of my listening is from a plex server located within my home network or via my TV thru HDMI it's no big problem for me but I accept it would be for a lot of people.

Why not just install a beta version? That should block any new update.

 

[CliffyBC]

Why not just install a beta version? That should block any new update.

I never thought of that, good call.

 

[khuntim]

Interested to see how this works out with external USB DACs. I'll get an external DAC/headphone amp while waiting for Amp Ultra availability.

Hopefully no lip-sync issues with ARC input using external USB DAC.

Found some passive speakers I like that will fit my small space (152mm wide):

https://www.dali-speakers.com/en-us/products/opticon-mk2/opticon-1-mk2/

 

[EddNog]

Interested to see how this works out with external USB DACs. I'll get an external DAC/headphone amp while waiting for Amp Ultra availability.

Hopefully no lip-sync issues with ARC input using external USB DAC.

Found some passive speakers I like that will fit my small space (152mm wide):

https://www.dali-speakers.com/en-us/products/opticon-mk2/opticon-1-mk2/

I use ARC input for watching stuff from Apple TV 4K and I have no lip sync issues despite my signal path to my speakers passing through an external DSP (miniDSP Flex digital I/O model applying DIRAC Live) which then feeds an external DAC (Topping E70 Velvet) that feeds monoblocs (Topping B200s) driving my KEF LS50 Metas, and they’re time-aligned (delayed) to three subs that are fed off a second miniDSP that is fed from the first miniDSP, and those three subs have their own DSP delays (SVS 3000 Micros and a PC-2000 Pro).

So yeah, lip sync not an issue.

-Ed

 

[KrimsonAudio]

There isn't a setting to adjust audio delay / lip sync over HDMI? It sounds like there isn't. BUT Isn't that a normal feature? I feel like I have that feature on my amp and I want to move from the wiim ultra to the wiim amp ultra, where I wouldn't need my amp. (I think my Shield TV has that feature. I wonder if the Apple TV does.)

 

[khuntim]

There isn't a setting to adjust audio delay / lip sync over HDMI? It sounds like there isn't. BUT Isn't that a normal feature? I feel like I have that feature on my amp and I want to move from the wiim ultra to the wiim amp ultra, where I wouldn't need my amp. (I think my Shield TV has that feature. I wonder if the Apple TV does.)

Kodi has all that for local files, on the fly lipsync, center channel level (in 2.0 environment) not too sure about Wiim lipsync adjustment. I have never had a problem. What amp do you use?

 

[KrimsonAudio]

Kodi has all that for local files, on the fly lipsync, center channel level (in 2.0 environment) not too sure about Wiim lipsync adjustment. I have never had a problem. What amp do you use?

I have the Sony STR-AN1000. It does have "A/V sync." It's a home theater focused amp but it handles hi-res audio well enough. I want a more minimalist set up though and go all wiim. Wiim is more music focused but a lip sync a/v sync feature is a must right? I see that the group audio delay function exists. I wonder if that is not meeting people's needs?

 

[Wiimer]

I see that the group audio delay function exists. I wonder if that is not meeting people's needs?

Group Audio Delay is only enabled in multi-room group; there is no lip-sync functionality when using a single WiiM device.

When playing the YouTube app on my TV connected to my WiiM Amp Ultra, the audio delay is often within 100ms and I don't experience any problems with normal viewing.

In many cases, there is lip-sync function on either the TV or the video streamer.

 

[EddNog]

There isn't a setting to adjust audio delay / lip sync over HDMI? It sounds like there isn't. BUT Isn't that a normal feature? I feel like I have that feature on my amp and I want to move from the wiim ultra to the wiim amp ultra, where I wouldn't need my amp. (I think my Shield TV has that feature. I wonder if the Apple TV does.)

Apple TV has an auto-calibration/sync.

-Ed