WiiM Amp Ultra Firmware v5.2.723250 Update - Jul 15, 2025

Please review the WiiM Amp 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.

5.2.723250 (Latest)​

Release date:

7 / 15 / 2025

What's New:

1. Roon Ready Certified: Seamless bit-perfect streaming from Roon.
   Tip: if Amp Ultra doesn’t appear in Roon after updating, simply restart the Roon app.
2. HDMI ARC Upgrade:
   • Eliminated pop/crackle noises.
   • Added Auto-Sensing for instant TV-audio pickup.
   • Improved the stability of ARC connections.
3. Advanced Parametric EQ: High-Pass & Low-Pass filters now available (App v3.2.6+ required).
4. Deezer: “Play Next / Play Last” options added.
5. Bluetooth: Adjustable latency for perfectly synced audio.

Bug Fixes:

1. Soundtrack Pairing: Fixed an issue preventing successful soundtrack pairing.
2. Gapless Playback: Fixed an issue causing incomplete audio playback.
3. USB Indexing: Corrected the extraction of PNG format covers from MP3 files and fixed a crash issue that caused playback to stop.
4. Qobuz Connect: Fixed an issue where playback would automatically resume after pausing when using USB output.

 

[Djinn206]

It seems my unit is in the first stage getting the new firmware. Already installing.

 

[Burnside]

It seems my unit is in the first stage getting the new firmware. Already installing.

Me too…

 

[Burnside]

While the new high and low pass filters appeared ok on my Android app, I had to kill and reload my iPad app for them to appear there

 

[harkpabst]

5. Phono Input: Resolved a no-sound issue when editing input mode via the app.

Glad to hear that not only a phono input has been added to the WiiM Ultra, but it's also been fixed right away.

PS:
Installing this right now.

 

[hgo58]

Glad to hear that not only a phono input has been added to the WiiM Ultra, but it's also been fixed right away.

PS:
Installing this right now.

@WiiM Support is still having issues with the proof reading of documentation or they have invented a new way to implement hardware

 

[Zap Rekowski]

Glad to hear that not only a phono input has been added to the WiiM Ultra, but it's also been fixed right away.

PS:
Installing this right now.

public:message.wrong

 

[QuarryHunslet]

The update was waiting for me when I got home, and it's installed now.

 

[harkpabst]

public:message.wrong

I swear I'm listening to an LP record through my WiiM Amp Ultra right now.

 

[DariuszP]

It seems my unit is in the first stage getting the new firmware. Already installing.

That's probably a bonus for being early adopters - I also got the update instantly, while for WiiM Ultra (that I also bought recently) usually I need to wait 2-3 days.

 

[Smartplug]

While the new high and low pass filters appeared ok on my Android app, I had to kill and reload my iPad app for them to appear there

Is this hi/low filter can be used in conjunction with rc?

 

[Wiimer]

Is this hi/low filter can be used in conjunction with rc?

I'm not sure what you're asking for, but I don't think so - LP/HP is a filter added to the PEQ; after running the RC, you can edit the saved PEQ to add LP/HP.

 

[Smartplug]

I'm not sure what you're asking for, but I don't think so - LP/HP is a filter added to the PEQ; after running the RC, you can edit the saved PEQ to add LP/HP.

View attachment 24157

Did it made difference by changing those to hi/low filter after rc? I would rather see in subwoofer section with both hi and low pass filter much like mini dsp.

 

[Wiimer]

Did it made difference by changing those to hi/low filter after rc? I would rather see in subwoofer section with both hi and low pass filter much like mini dsp.

Sorry, I haven't used it yet.

 

[Wiimer]

I have 2 subs connected to the Amp's sub-out now, so I have no plans to use LP/HP at the moment..

 

[harkpabst]

Did it made difference by changing those to hi/low filter after rc? I would rather see in subwoofer section with both hi and low pass filter much like mini dsp.

If you are asking for independent low pass (subwoofer) and high pass (mainspeakers) filters for more flexible integration, then no, this change won't do that.

The PEQ is applied to the signal prior to splitting it between mains and sub. Adding, say, a 70 Hz low pass filter and a 50 Hz high pass filter (overlapping) would effectively lead to no output at all.

If the RoomFit algorithm also makes use of the HPF and LPG now available for manual PEQ is not known yet. But I doubt it. WiiM made no announcement in this direction. Also, there's usually not much use for a (4th order) LPF or HPF since the available target curves don't ask for this. This should be easy to check,just perform a room correction measurement and look at the created filters.

So far - I think - the algorithm doesn't even make use of shelving filters, which could be very helpful in many cases. But only if the resti g Q values are correct and also shown correctly. I really think there would be much more to gain from adding shelving filter support to the RoomFit algorithm.

 

[Wiimer]

If you are asking for independent low pass (subwoofer) and high pass (mainspeakers) filters for more flexible integration, then no, this change won't do that.

The PEQ is applied to the signal prior to splitting it between mains and sub. Adding, say, a 50 Hz low pass filter and a 70 Hz high pass filter would effectively lead to no output at all.

If the RoomFit algorithm also makes use of the HPF and LPG now available for manual PEQ is not known yet. But I doubt it. WiiM made no announcement in this direction. Also, there's usually not much use for a (4th order) LPF or HPF since the available target curves don't ask for this. This should be easy to check,just perform a room correction measurement and look at the created filters.

So far - I think - the algorithm doesn't even make use of shelving filters, which could be very helpful in many cases. But only if the resti g Q values are correct and also shown correctly. I really think there would be much more to gain from adding shelving filter support to the RoomFit algorithm.

Yes, LP/HP is mainly a feature to meet the request of users who want to operate a main speaker and a subwoofer (or bi-amp) in multi-room playback using 2 WiiMs.

 

[harkpabst]

Yes, LP/HP is mainly a feature to meet the request of users who want to operate a main speaker and a subwoofer (or bi-amp) in multi-room playback using 2 WiiMs.

Exactly. It's WiiM's @Wiimer feature.

Let's see how the integration with the upcoming Sub will be done for various WiiM devices.

 

[Wiimer]

Exactly. It's WiiM's @Wiimer feature.

Let's see how the integration with the upcoming Sub will be done for various WiiM devices.

But I feel a bit sorry for the team, as I've already quit Multiroom..

For this to work perfectly, I would need the ability to constantly synchronise (linkage) the volume of the 2 WiiMs.