WiiM Ultra Firmware v5.2.725647 Update - Aug 8, 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.

5.2.725647 (In Progress)​

Release date:

8 / 8 / 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.

 

[slartibartfast]

I actually like it
I am actually using it when I didn’t in the past
Ran roomfit accept it then added my eq setting and it sounds good to me

Which target curve did you pick for Roomfit? I choose B&K but if there was a tilt option for EQ I would be more likely to choose flat and then add an EQ on top.

 

[DariuszP]

I actually like it
I am actually using it when I didn’t in the past
Ran roomfit accept it then added my eq setting and it sounds good to me

I fully agree, it has the potential to be VERY useful. And as long as you just have one RoomFit profile it already would work nice - problems start when you have slightly more complicated setup requiring multiple room corrections (e.g. WiiM Ultra connected to wo sets of speakers via two ampfiers).

 

[Skull]

Which target curve did you pick for Roomfit? I choose B&K but if there was a tilt option for EQ I would be more likely to choose flat and then add an EQ on top.

Yea B&k was what I used but I haven’t messed about with it to much as previously I did not like how it sounded
Just used manual eq
I will do more after I get my new speakers in 3 weeks, waste of time until then
Cannot wait to stop using the Sonos speakers tbh

 

[Skull]

Which target curve did you pick for Roomfit? I choose B&K but if there was a tilt option for EQ I would be more likely to choose flat and then add an EQ on top.

Just did a new flat profile will test tomorrow morning

 

[Wiimer]

I am very very sorry if it sounded that I am attacking you - not at all, I very much appreciate your help! I am just a bit frustrated as the much welcome feature actually broke my entire routines due to some tiny UI problem. And in fact I cannot imagine any reason for the presets (or - for the record: outputs) do not include switch for RoomFit - it is not hardware limitation as the gear is perfectly capable of having this applied (I just must apply this manually instead of via pressing button on my remote). Btw: is it anyway to revert to previous firmware and stick to this? - because in fact I would opt for this...

No problem at all
Sorry, I was just joking a bit. I understand your frustrate. When I receive this FW, I will send a request ticket again.

 

[slartibartfast]

Just did a new flat profile will test tomorrow morning

Don't delete the B&K yet

 

[Skull]

Don't delete the B&K yet

I won’t but all will be deleted and rerun in 3 weeks anyway

 

[Steve Woodhouse]

Are we any closer to being able to choose our own icons for custom presets?

 

[DariuszP]

I won’t but all will be deleted and rerun in 3 weeks anyway

Don't delete the B&K yet

Guys, maybe you would know - is there a way to setup RoomFit / EQ in such manner that it automatically equalizes loudness - i.e. if I push one band higher all other would slightly go down proportionally, so total level is unchanged?

 

[SKApretto71]

Guys, maybe you would know - is there a way to setup RoomFit / EQ in such manner that it automatically equalizes loudness - i.e. if I push one band higher all other would slightly go down proportionally, so total level is unchanged?

Not that I'm aware of.

 

[neilbardsley]

This update doesn't seem to be available on my WIIM. Do I wait or can I force the download?

 

[SKApretto71]

This update doesn't seem to be available on my WIIM. Do I wait or can I force the download?

Wait.

 

[harkpabst]

This update doesn't seem to be available on my WIIM. Do I wait or can I force the download?

You have to wait until it's shown as available for your device. No forced update, no manual side loading.

Guys, maybe you would know - is there a way to setup RoomFit / EQ in such manner that it automatically equalizes loudness - i.e. if I push one band higher all other would slightly go down proportionally, so total level is unchanged?

Is there any real benefit in keeping the average of all PEQ filters the same? How exactly should that average be calculated?

RoomFit now has the "Cut-Only Mode" (for as long as it hasn't been renamed to what @Wiimer suggested). It avoids a boost in any frequency range but does not attempt to give a neutral average. Wouldn't make sense with respect to digital clipping.

It's probably better to work with negative manual PEQ adjustments only, as long as the required gain range is sufficient.

 

[QuarryHunslet]

This update doesn't seem to be available on my WIIM. Do I wait or can I force the download?

It was only released today, so you should receive it within the next few days.

 

[anonyless]

Firmware just arrived. I tested this literally for 5 minutes, but it seems that this functionality requires some tweaking to make it fully functional. Please also be so nice to correct me if my analysis is wrong and I simply missed something? @WiiM Team - please advise.

AS OF NOW:
1) You can switch RoomFit on and off, you can also have several RoomFit profiles to select from, however
2) You cannot assign RoomFit status (on / off) nor its particular profiles to particular output (even though each profile indicates on which output it was measured). There is no such switch in the Output section of the settings,
3) You cannot assign RoomFit status nor its particular profile to particular preset. There is no such switch in the Preset section of the settings.

WHY THIS IS SUBOPTIMAL (OR EVEN: IN SOME USE CASES - WORSE THEN BEFORE)
1) Now, when switching to other output you must manually change the status of RoomFit, or else you will stick to the one selected before (not matching particular output - e.g. speakers connected to particular amp),
2) Before the update it was not a problem as you link the EQ status (that included RoomFit data) to particular preset, so you could switch outputs with the presets and get proper RoomFit after such switch. Obviously it was not possible to independently "stack" EQ on this, so you needed e.g. 2-3 EQ settings for each output - e.g. I had different EQ (including already RoomFit data) for radio stations via optical and different for streaming via optical - quite cumbersome but... working. Now apparently it is not possible and everytime I switch output I will have to remember about it and get deeply into settings to change RoomFit (before I could also do this easily from Now Playing screen).

WHAT SHOULD BE CHANGED:
1) Adding switches for RoomFit in Output and Preset sections - selection from existing RoomFit profiles, including OFF. It seems to be relatively easy change to implement. EDIT: Of course, this switch should also have the option of not changing anything (i.e. "Current").

As a side note - if I am not wrong and it really works the way as I described, I am quite surprised that it was not anyhow detected / improved during [I guess 6 months of] beta testing of this feature.

there's more - with the new RoomFit update, you can't turn it off form the Ultra's EQ screen.
is there a way to revert back?

 

[hgo58]

there's more - with the new RoomFit update, you can't turn it off form the Ultra's EQ screen.
is there a way to revert back?

Unfortunately @WiiM Team did not put the previous version up as a beta version, so you could revert to it. Only the previous previous version is there.

 

[Machiavelli]

arrived this morning. nothing of interest for me. best thing, the ultra still does for what i have it. noticed that it is only revertible to one, the previous previous version. no choice or stack in sight.

 

[anonyless]

Unfortunately @WiiM Team did not put the previous version up as a beta version, so you could revert to it. Only the previous previous version is there.

very weird this feature was in beta testing for so long, and now released as "stable" with an actual decrease in functionality

 

[slartibartfast]

very weird this feature was in beta testing for so long, and now released as "stable" with an actual decrease in functionality

Was there more functionality in the beta version? Amp owners never got to try the beta.

 

[anonyless]

Was there more functionality in the beta version? Amp owners never got to try the beta.

i don't know -
what i meant , comparing to the previous stable firmware (without the RoomFit separated from EQ update)