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.

 

[Frank Varon]

I don't see anything of interest for me in this update.

RoomFit combined with EQ is absolutely fantastic for me.

 

[hgo58]

Has anyone noticed a random short fade out, fade in on the left speaker?

I get it on this version when I have both RoomFit (LR) and EQ enabled, independent of input source.

 

[reniro]

there are new "bugs" which haven't been there before. Is there any way to report them here or only over the iOS App ?

 

[hgo58]

hey there a new "bugs" which haven't been there before. Is there any way to report them here or only over the iOS App ?

You should use the WiiM Home App Feedback to raise issues.

If you can, do it at the time you see the issue. The feedback will contain a copy of your WiM device logs.

 

[FrankR]

At the risk of being called a fanboy: Independent EQ and RoomFit is the most important single improvement since the introduction of 10 band EQ for me. Period.

Those who don't care for RoomFit or EQ at all, thanks for your input. Admittedly, I don't care about your priorities but my own.
Everyone is entitled to their own option, naturally, but 90% of the criticism I simply cannot follow at all. WiiM introduce a new feature (which is mainly optional as you can more or less use everything as before if you prefer), it's just not available from the touchscreen. How can this be reduced functionality? That's twisted logic!
WiiM design and role out the core functionality first. That's the change that really adds the value. They care about the fine tuning later, improving manageability and ease of use. That's the way they have done it from the beginning and it's simply the typical agile way. How can we still be surprised?

Thank you @WiiM Team for implementing this killer feature only available on expensive high-end equipment so far.

Well said. I feel the Wiim team deserve more compliments than complaints. I can't think of another company that continues to improve a product they've already sold you.

 

[reniro]

Has anyone noticed a random short fade out, fade in on the left speaker?

I get it on this version when I have both RoomFit (LR) and EQ enabled, independent of input source.

no fade in or fade out but the right speaker is louder than the left one ... voice is not "in the middle" anymore and overall it sounds more damped and not as clean as before. But its the same on every update for me ... my active speakers sound best without EQ and RoomFit every single time i test a new version of the firmware.

 

[harkpabst]

Because I play my optical out to Denon AVR and small speakers, while Line Out to Accuphase amp and large speakers. And those two have very different characteristics. I guess that connecting this to various gear is one of the reasons for which WiiM Ultra have different outputs. And easy of use was one of my primary accolades to WiiM - I could just press a single button on the remote and play particular source to particular output with particular EQ. Now it is not possible at all - I need to take my phone and dig deeply into the menus to change RoomFit profile.

Why should different RF profiles be tied to individual outputs then? Other users might use multiple setups, just like you, but decide to plug the RCA cable into different power amps, connected to different speakers. The prime solution is the ability to store multiple RoomFit profiles. A secondary step is being able to assign these to different outputs, if needed.

And while I fully understand (and support) your need I have to say that this is a niche requirement in the grand scheme of things.

Well, as quite extensively explained in this tread, unfortunately this is not the case - you cannot use EQ and RF as before. When you set the RF to particular profile it stays and only way of changing it is to dig deep into the menus.

There is a workaround, though, as you know. So no, there is no loss of functionality at all.

Currently, I can't disable RoomFit (automatically or by preset) when switching to the headphone output.

As a first aid, I would like to create a PEQ that is inversely correlated to the RoomFit profile and switch to this in the presets to see if this can be flattened.

I think this would be more of a hack than a solution. Being able to assign RoomFit profiles (or no profile aka the neutral profile) to outputs and/or presets.

I think that 'Flat' eq was measured to be different to no eq, and as we still can't choose no eq in a preset then there's buckley's of getting an inverse.

Yes, "different" as in "not bit perfect", not necessarily as in "audibly different". I'd really prefer a "clean" solution over a short-lived "first aid patch".

 

[DariuszP]

I have to say that this is a niche requirement in the grand scheme of things.

It is quite understandable that users who do not use a particular setup / functionality sometimes tend to dismiss some other legitimate needs as "niche" - as those simply do not apply to them? But in reality WiiM Ultra by design has several outputs and those often will be connected to different gear - this is their primary goal (actually my setup is even a bit more complex as I also have coax connected to my DAC and USB connected to yet another DAC - but as those are connected to the same amp / speakers, this does not make much of a difference). The purpose of this would be twofold: convenience of use as well a pure fun of using various setups (quite common among hi-fi folks). And accordingly, those outputs might typically have different room correction characteristics and thus this function should be easily switchable together with the outputs. This should not be "mandatory" as you should be able to assign the same room correction profile to all outputs and / or be able to keep this value as "current" (i.e. w/o switching - this should be a default value), but somehow I cannot see why such a basic functionality could be seen as a sort of exotic request (please note that even RoomFit profiles themselves have a remark on which output it was developed)?

There is a workaround, though, as you know. So no, there is no loss of functionality at all.

"Workaround" be definition suggests that something does not work as it should to begin with.

But otherwise I fully agree that the overall concept of separate RC and EQ is great and much welcome - it just requires some (relatively easy to implement) modifications in order to make it ergonomic for people that actually use several outputs (as WiiM Ultra allows).

 

[harkpabst]

But otherwise I fully agree that the overall concept of separate RC and EQ is great and much welcome - it just requires some (relatively easy to implement) modifications in order to make it ergonomic for people that actually use several outputs (as WiiM Ultra allows).

Avoiding any further discussion about what is a niche and what isn't (you already know my opinion ) I agree on this one.

As I said before, WiiM tend to not present a fully finished feature set, but develop from an accepted base line. I'd be surprised if they wouldn't take note of the enhancements required.

 

[MGJ]

Love this update! 20 bands of PEQ or 10 PEQ / 10 EQ. Works great.

 

[DariuszP]

I finally decided to submit my own "ticket" with the description of the problem and the following proposed solution:

"WHAT SHOULD BE CHANGED:
1) Adding switches for RoomFit in particular Output sections - selection from existing RoomFit profiles, including OFF. Of course, this switch should also have the option of not changing anything (i.e. "Current").

This request would also apply to WiiM Amp Ultra, where you could have different outputs as well (e.g. speakers vs. USB DAC)."

I hope this will help

I am delighted to report that @WiiM Support already positively replied to my suggestion including "we will add an option to assign a specific RoomFit profile to each output". So it is exactly as I said in one of my previous posts - it will just take (probably: not that long?) wait and in the meantime enjoying this great feature "as is". I am extremely happy with this - what a great customer service (as always)! Many many thanks to WiiM for their great job and to all of you for your support (and patience with my little rants)!

 

[TimTim]

Well said. I feel the Wiim team deserve more compliments than complaints. I can't think of another company that continues to improve a product they've already sold you.

Fuji tends to do that and their firmware feels more finished to begin with. However, they never post a timeline of things that aren’t quite working yet but should be fixed at some future date.

Plenty of other companies do it too.

But that aside, I’m happy that Wiim is still trying to improve the Ultra.

 

[DariuszP]

Fuji tends to do that and their firmware feels more finished to begin with. However, they never post a timeline of things that aren’t quite working yet but should be fixed at some future date.

Plenty of other companies do it too.

But that aside, I’m happy that Wiim is still trying to improve the Ultra.

Strongly disagree. Most companies do not do this at all and those that actually counter in the users requests are really extremely rare (I mentally reviewed all my gear, hi-fi and all other, including other electronics, home appliances, cars, etc. and literally cannot name ONE). EDIT: Sorry, I just found one - Bosch e-bike systems.

 

[hgo58]

Strongly disagree. Most companies do not do this at all and those that actually counter in the users requests are really extremely rare (I mentally reviewed all my gear, hi-fi and all other, including other electronics, home appliances, cars, etc. and literally cannot name ONE). EDIT: Sorry, I just found one - Bosch e-bike systems.

Don't you own a PC or phone? They are constantly updated and something always breaks.

 

[slartibartfast]

Don't you own a PC or phone? They are constantly updated and something always breaks.

To be fair the original post said "improve"

 

[Machiavelli]

Don't you own a PC or phone? They are constantly updated and something always breaks.

disagree
updated yes. broke no.

 

[DariuszP]

Don't you own a PC or phone? They are constantly updated and something always breaks.

Have you ever tried to suggest an improvement to Apple? Good luck. EDIT: Clarification: in fact companies implement software updates, but rarely listening to the users and I agree that very often the updates do not work properly. I disagreed that there are many companies like WiiM that listen to the users and implement really useful features.

 

[Machiavelli]

Have you ever tried to suggest an improvement to Apple? Good luck.

never had the intention. the stuff works.

 

[Skull]

Do you use stereo or individual channel? Individual channel results in more bass.

Ok so I foolishly ran roomfit with Sonos truplay enabled, don’t know if this makes a difference,so I redid Harmon but this time I did a l/r correction and you are correct more bass
Meant tweaking my eq setting a bit as the sub was drilling a hole in my floor

 

[slartibartfast]

Ok so I foolishly ran roomfit with Sonos truplay enabled, don’t know if this makes a difference,so I redid Harmon but this time I did a l/r correction and you are correct more bass
Meant tweaking my eq setting a bit as the sub was drilling a hole in my floor

Try B&K with individual channels