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.

 

[bever70]

My audiologist told me I had rubbish ears so all this room correction and EQ combined is a waste of time for me. All I want is my ultra to work with my TV and my Plex server and sound decent enough., which it does. I would like Youtube music and a proper plex endpoint, all the rest I could do without.

Being an audiophile requires top quality hearing which I no longer have. I'm at the time of life when I have the money to buy expensive hifi gear but what would be the point, it might look nicer than the Ultra but I wouldn't be able to hear the difference.
Ain't life a bummer?

Well look at it this way: good for you that you can't hear room modes. One less thing to worry about.
I can and the RC deals with them.

 

[pjorgenunes]

Nothing for me either, too much use of the words "enhanced", I'm happy with this version thanks.

My audiologist told me I had rubbish ears so all this room correction and EQ combined is a waste of time for me. All I want is my ultra to work with my TV and my Plex server and sound decent enough., which it does. I would like Youtube music and a proper plex endpoint, all the rest I could do without.

Being an audiophile requires top quality hearing which I no longer have. I'm at the time of life when I have the money to buy expensive hifi gear but what would be the point, it might look nicer than the Ultra but I wouldn't be able to hear the difference.
Ain't life a bummer?

One don´t need golden years to perceive the difference of at least taming the two or three room modes.
For most rooms (even with some mild treatment) and well placed speakers we get intrusive room modes (and not everybody can place speakers near or in the ideal spot - it is usually physically intrusive).

In my case I have the major room mode at 49Hz, with a +10dB increase (not to mention the sound energy at this and around this frequency that takes more time to disappear).
This leads to masking all sound on the bass and mid-bass region.

Even if auto-correction don't work for you, you can put your room dimensions in several online calculators that calculate this room modes. Find the major one and give a try to manual correction at that frequency and something around -6dB or so and a Q of 2-4.
In WiiM it's absolute easy to enable and disable the EQ while playing the music to see what you like more.

For me RoomFit worked better only correcting 35Hz-300Hz. At full range I did not like the results. The reason may be that I like the sound signature of my B&W 805S speakers.

 

[CliffyBC]

Well look at it this way: good for you that you can't hear room modes. One less thing to worry about.
I can and the RC deals with them.

That's one of the great things about Wiim, they are always trying to improve their gear and add new features long after you have bought them.

 

[Steve Woodhouse]

That's one of the great things about Wiim, they are always trying to improve their gear and add new features long after you have bought them.

The WiiM Mini is a substantially better product now than it was at release.

Will you be able to add the WiiM Sub?

 

[CliffyBC]

One don´t need golden years to perceive the difference of at least taming the two or three room modes.
For most rooms (even with some mild treatment) and well placed speakers we get intrusive room modes (and not everybody can place speakers near or in the ideal spot - it is usually physically intrusive).

In my case I have the major room mode at 49Hz, with a +10dB increase (not to mention the sound energy at this and around this frequency that takes more time to disappear).
This leads to masking all sound on the bass and mid-bass region.

Even if auto-correction don't work for you, you can put your room dimensions in several online calculators that calculate this room modes. Find the major one and give a try to manual correction at that frequency and something around -6dB or so and a Q of 2-4.
In WiiM it's absolute easy to enable and disable the EQ while playing the music to see what you like more.

For me RoomFit worked better only correcting 35Hz-300Hz. At full range I did not like the results. The reason may be that I like the sound signature of my B&W 805S speakers.

When I did a factory reset the other week after a Firmware update screwed my hdmi,
I clicked on Roomfit and the ultra made a noise, showed me a graph and I accepted it.
Is that all I needed to do? Maybe the RoomFit did a good job the first time around?
I have a 7 m square room and the Ultra sounds fine to me. As my hearing is as far removed from "golden ears" as it's possible to get, I don't think tinkering with RC settings will improve things a great deal. But maybe I'm wrong.
But you are right, altering the EQ whilst I'm listening to music is nice and simple and the different EQ's do make a perceiveable difference to me.

 

[CliffyBC]

The WiiM Mini is a substantially better product now than it was at release.

Will you be able to add the WiiM Sub?

The WiiM Mini is a substantially better product now than it was at release.

Will you be able to add the WiiM Sub?

I have a wharfdale SW10 sub, had it a fair while and it does the job. I do like the look of the WiiM Sub though.

 

[Kblade97]

@WiiM Team, @WiiM Support, @RyanWithWiiM,

Ticket No.539209

------------------------------
When I woke up in the morning, the auto-update had reverted mine back to 5.2.723250
------------------------------



After the update, I'm experiencing a strange phenomenon that I've never seen before.

When I completed the update and opened the device screen, I saw the old version of the Rocket.
View attachment 25100

I have rebooted the Ultra but the icon has not disappeared.
View attachment 25102

Also, the beta testing screen still shows the 27 June firmware and no 15 July version.
View attachment 25103
Is this a new feature for manual downdates? (It's a bug, right?)

Every time I open WiiM app, the rocket appears, so I get excited for nothing

 

[F1 Fan]

Mine also "updated" this morning to v5.2.723250 instead of v5.2.725451. It was already at v5.2.723250 before I was prompted to upgrade. Join Beta Testing still shows v5.2.721349 for Revert to Previous Version. Rebooting did not help.

Same here ..

 

[Kblade97]

Do you find rc degrade sound?

I do

 

[EddNog]

I do

If you use full-range, it will more likely do more harm than good. Have you tried limiting it to under 2KHz?

-Ed

 

[Audionaut]

When will we see this Firmware on the Amp Ultra? Can‘t wait to use Room Correction combined with EQ.

I have to admit that I didn't understand what was changing at all, because it has always been possible to have the room correction done and then adjust the PEQ to your own needs if you didn't completely like the result of the room correction.
So what is changing?

 

[hgo58]

I have to admit that I didn't understand what was changing at all, because it has always been possible to have the room correction done and then adjust the PEQ to your own needs if you didn't completely like the result of the room correction.
So what is changing?

The RoomFit is being separated from the EQ. So you can have room correction and then apply any EQ on top of it. Allowing to have a fixed RoomFit and a variable EQ setting depending on what you are streaming.

How to Upgrade Your Listening Experience with Independent EQ and Room Correction

With the latest update, WiiM devices now support independent EQ and Room Correction, allowing both to be used together for a more flexible and immersive listening experience. For detailes on Room Correction and EQ, see Understanding the Differenc...

faq.wiimhome.com

Understanding the Differences and Relationship Between EQ and Room Correction

TABLE OF CONTENTS What is Room Correction? What is EQ (Equalization)? How Room Correction and EQ Work Together 1. Room Correction as the Foundation 2. EQ for Personalization 3. Adjusting Input-Specific EQ Summary and Conclusion WiiM ...

faq.wiimhome.com

 

[Audionaut]

So you can have room correction and then apply any EQ on top of it.

Well, that has always been possible too.
Apply room correction. Save. Duplicate and rename, adjust with PEQ or delete if you want.
The "original" room correction was then still available.

But it doesn't matter, in my opinion nothing else is possible now than before, only the procedure has changed and is perhaps more user-friendly for some.

 

[F1 Fan]

Still no update here ..

 

[DariuszP]

I have to admit that I didn't understand what was changing at all, because it has always been possible to have the room correction done and then adjust the PEQ to your own needs if you didn't completely like the result of the room correction.
So what is changing?

As @hgo58 replied - this allows to do the following: FIRST correct the room and treat this as a base-case and THEN apply any EQ you want e.g. using non-PEQ quick settings such as e.g. more bass, more treble, etc. Or the one you have created on your own (including PEQ). So for e.g. you could add contour-type EQ for low-level listening, etc. Of course you are right that you could also do this on your own, as I did, but I must admit it was sort of cumbersome and I find this change super-useful (or to be precise: I hope this will be when the firmware finally arrives, still waiting...). EDIT: And think also about the following setups - you could room-correct your various set of speakers or speaker placements or amps connected to WiiM Ultra and than apply the EQ to any of those - prior to this change this would require dozens of saved PEQ profiles and was very difficult to manage and apply...

 

[Wiimer]

Well, that has always been possible too.
Apply room correction. Save. Duplicate and rename, adjust with PEQ or delete if you want.
The "original" room correction was then still available.

But it doesn't matter, in my opinion nothing else is possible now than before, only the procedure has changed and is perhaps more user-friendly for some.

It doesn't.

With this update, you can now double layer EQ on top of RoomFit. You can correct a room in RoomFit and save it as a RoomFit. And you can season it with the EQ of your choice.

E.g., if you adjust the bass flat in RoomFit, you can then turn on the 'Vocal Booster' EQ only when watching TV. (Custom GEQ/PEQ can also be stacked.)

We used to eat toast with just butter. But now, depending on our mood, we can eat it with more maple syrup or honey on top of the butter

(Apologies if this is a poor analogy )

 

[Wiimer]

Well, that has always been possible too.
Apply room correction. Save. Duplicate and rename, adjust with PEQ or delete if you want.
The "original" room correction was then still available.

But it doesn't matter, in my opinion nothing else is possible now than before, only the procedure has changed and is perhaps more user-friendly for some.

Another advantage.
Perhaps in the future it will be possible to apply RoomFit to different outputs (using presets) and EQ to different inputs.

You could then apply different RoomFits for headphone and speakers, and then layer your preferred EQ on top of that for each input.

 

[slartibartfast]

Well, that has always been possible too.
Apply room correction. Save. Duplicate and rename, adjust with PEQ or delete if you want.
The "original" room correction was then still available.

But it doesn't matter, in my opinion nothing else is possible now than before, only the procedure has changed and is perhaps more user-friendly for some.

You couldn't simply adjust the graphic equaliser while also using the room correction before.

 

[Smartplug]

It doesn't.

With this update, you can now double layer EQ on top of RoomFit. You can correct a room in RoomFit and save it as a RoomFit. And you can season it with the EQ of your choice.

E.g., if you adjust the bass flat in RoomFit, you can then turn on the 'Vocal Booster' EQ only when watching TV. (Custom GEQ/PEQ can also be stacked.)

We used to eat toast with just butter. But now, depending on our mood, we can eat it with more maple syrup or honey on top of the butter

(Apologies if this is a poor analogy )

I got the update rerun roomfit then choose preset geq or custom peq/geq of your choice. I wonder what’s next feature after this?

 

[DariuszP]

Another advantage.
Perhaps in the future it will be possible to apply RoomFit to different outputs (using presets) and EQ to different inputs.

You could then apply different RoomFits for headphone and speakers, and then layer your preferred EQ on top of that for each input.

Does it mean that as of now it is not possible to link different RoomFit profiles to particular outputs (via Preset or otherwise?) - if that was the case it would be quite strange omission that would a sort of undermine the entire concept - in my setup (playing to different set of speakers via different outputs) I would still need to use EQ rather than RoomFit... Can I at least turn RoomFit off for particular outputs?