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.
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.

 

[EddNog]

Oh, so the USB output problem wasn't just me after all!

-Ed

 

[Susan’s boil]

Ah! That explains it, then. I got my first ever external DAC last Friday - the Topping DX5 ii - and have been having severe conniptions due to the issues I was having connecting the Ultra to it via USB. I was genuinely ready to throw up my hands, admit defeat and send it back, and the only thing that stopped me from returning it, well, two things, first of all I bought it direct from Shenzhen Audio and balked at what I thought was going to be a ball-ache of a return, and secondly, the various problems I encountered were intermittent hence I was convinced it was something I was doing, something I wasn’t getting, that meant the Ultra would, and then wouldn’t, let me cast to it, and would, and then wouldn’t, output a signal to the Topping vis USB. This was all to my dog’s benefit because whenever I begin to lose my mind over a seemingly simple audio issue I take him for a walk to calm down and invariably resolve the issue on my return, but the USB connection issues between the Ultra and the Topping really tested my patience. I doubt anyone will be surprised to learn that when they weren’t connecting all it took to resolve it was powering off the Ultra and then it would all work upon powering it back on, but this was obviously incredibly frustrating - as an aside the addition of the Topping has improved the sound so much that I’ve removed my subwoofer! Talk about a night and day improvement, and this is to a set up that already sounded superb! And my Fyne Audio F701 2-way, 200mm concentric speakers, and Icon Audio ST 30SE integrated valve amp sound like HEAVEN.

 

[Smartplug]

I’m sure @slartibartfast will be happy on this update since he’s one biggest fans of room correction and eq. I can’t want to get this update to try it out. Room correction to fix room issue in combination with preset graphic for personal preference.

 

[EddNog]

Ah! That explains it, then. I got my first ever external DAC last Friday - the Topping DX5 ii - and have been having severe conniptions due to the issues I was having connecting the Ultra to it via USB. I was genuinely ready to throw up my hands, admit defeat and send it back, and the only thing that stopped me from returning it, well, two things, first of all I bought it direct from Shenzhen Audio and balked at what I thought was going to be a ball-ache of a return, and secondly, the various problems I encountered were intermittent hence I was convinced it was something I was doing, something I wasn’t getting, that meant the Ultra would, and then wouldn’t, let me cast to it, and would, and then wouldn’t, output a signal to the Topping vis USB. This was all to my dog’s benefit because whenever I begin to lose my mind over a seemingly simple audio issue I take him for a walk to calm down and invariably resolve the issue on my return, but the USB connection issues between the Ultra and the Topping really tested my patience. I doubt anyone will be surprised to learn that when they weren’t connecting all it took to resolve it was powering off the Ultra and then it would all work upon powering it back on, but this was obviously incredibly frustrating - as an aside the addition of the Topping has improved the sound so much that I’ve removed my subwoofer! Talk about a night and day improvement, and this is to a set up that already sounded superb! And my Fyne Audio F701 2-way, 200mm concentric speakers, and Icon Audio ST 30SE integrated valve amp sound like HEAVEN.

I had simply swapped to Optical.

-Ed

 

[slartibartfast]

I’m sure @slartibartfast will be happy on this update since he’s one biggest fans of room correction and eq. I can’t want to get this update to try it out. Room correction to fix room issue in combination with preset graphic for personal preference.

I would be if it was for the Amp.

 

[EddNog]

I would be if it was for the Amp.

Wait…

You have a WiiM Amp but still use USB output? Curious now about your setup.

-Ed

 

[slartibartfast]

Wait…

You have a WiiM Amp but still use USB output? Curious now about your setup.

-Ed

Simultaneous Room Correction (sorry Roomfit) and EQ isn't just for USB output.

 

[Smartplug]

Wait…

You have a WiiM Amp but still use USB output? Curious now about your setup.

-Ed

The usb on amp can be used to external dac which is nice upgrading dac of your choice instead replacing the amp itself. The beauty of flexible wiim device.

 

[EddNog]

The usb on amp can be used to external dac which is nice upgrading dac of your choice instead replacing the amp itself. The beauty of flexible wiim device.

Right, I understand that; I was just confused about paying for a full Amp if you're not using the built-in amp. Might as well just use a Pro or Pro Plus instead of Amp or Amp Pro.

-Ed

 

[slartibartfast]

The usb on amp can be used to external dac which is nice upgrading dac of your choice instead replacing the amp itself. The beauty of flexible wiim device.

Not really. You would still need a new amp to plug the external DAC into. You can use the USB for a headphone amp though.

 

[EddNog]

Simultaneous Room Correction (sorry Roomfit) and EQ isn't just for USB output.

Yeah, no...wasn't any confusion on this aspect. See my post #10 above.

-Ed

 

[EddNog]

Not really. You would still need a new amp to plug the external DAC into. You can use the USB for a headphone amp though.

Ah, so that's what it is--you're using an external headphone amp with built-in DAC. Got it.

-Ed

 

[slartibartfast]

Ah, so that's what it is--you're using an external headphone amp with built-in DAC. Got it.

-Ed

I didn't say I was doing that just that you can

 

[slartibartfast]

Yeah, no...wasn't any confusion on this aspect. See my post #10 above.

-Ed

Why do you think I am using the USB output then? @Smartplug didn't mention it.

 

[EddNog]

Why do you think I am using the USB output then? @Smartplug didn't mention it.

I'm guessing I misinterpreted your post #6 as saying that you would be using this update to fix your USB output if the update was for WiiM Amp...I completely glossed over the fact that this was pertaining to the EQ combined with RoomFit, and not to the USB output fix. My mistake.

-Ed

 

[Susan’s boil]

I had simply swapped to Optical.

-Ed

Yeah, I did that as well, and coax, and I have to say that, along with the USB when it deigned to work, all three options sounded really good. In fact, to my ears they were indistinguishable from each other sq-wise, but I have to admit I lack your sanguinity around connectivity and functionality issues. In short, if one of the purported options for connectivity between the Ultra and an external DAC doesn’t work, then frankly that isn’t good enough for me, plain and simple, especially when you factor in how much cash and time we spend in order to listen to our music in the most satisfying way possible, hence I’m all for this update. It actually wouldn’t have been so frustrating if the USB connectivity just didn’t work at all, like not even once, but the fact of it being intermittent meant I found it even more of a wind up than I usually would. Still, it’s all good now, or at least I hope it will be. Kudos to WiiM, though, for getting on top of issues and shortcomings as quickly as they do. I can think of a hell of a lot of companies and corporations that would do well to take a leaf out of their book customer service-wise.

 

[EddNog]

Yeah, I did that as well, and coax, and I have to say that, along with the USB when it deigned to work, all three options sounded really good. In fact, to my ears they were indistinguishable from each other sq-wise, but I have to admit I lack your sanguinity around connectivity and functionality issues. In short, if one of the purported options for connectivity between the Ultra and an external DAC doesn’t work, then frankly that isn’t good enough for me, plain and simple, especially when you factor in how much cash and time we spend in order to listen to our music in the most satisfying way possible, hence I’m all for this update. It actually wouldn’t have been so frustrating if the USB connectivity just didn’t work at all, like not even once, but the fact of it being intermittent meant I found it even more of a wind up than I usually would. Still, it’s all good now, or at least I hope it will be. Kudos to WiiM, though, for getting on top of issues and shortcomings as quickly as they do. I can think of a hell of a lot of companies and corporations that would do well to take a leaf out of their book customer service-wise.

Yeah well to be honest, I wasn’t sure that the WiiM was the problem. I thought it could be an issue with my miniDSP, and I bought that thing used, so I expected no way to fix it, and resigned myself to just using optical instead. Had I ever figured the WiiM was the issue, I’d have at least put in a ticket.

-Ed