WiiM Pro Plus Firmware v4.8.726839 Update - Aug 20, 2025

Please review the WiiM Pro Plus 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.

4.8.726839 (Latest)​

Release date:

8 / 20 / 2025

Bug Fix:

1. No Bass Audio: Fixed an issue that caused bass audio not to output.

 

[QuarryHunslet]

Update received by my Pro Plus.

 

[Erebus]

Update received by my Pro Plus.

Same. Just updated. I'm a bit confused though as I did not detect any issues with lack of bass.

 

[QuarryHunslet]

Same. Just updated. I'm a bit confused though as I did not detect any issues with lack of bass.

Me neither.

 

[hgo58]

Me neither.

Did you have an active RoomFit profile? Looks like only those got the issue.

 

[Erebus]

Did you have an active RoomFit profile?

No. Never used it, just the standard EQ.

 

[QuarryHunslet]

Did you have an active RoomFit profile? Looks like only those got the issue.

No, I have no need for such features.

 

[hgo58]

No. Never used it, just the standard EQ.

No, I have no need for such features.

So that is why you didn't get the issue!

 

[hgo58]

No, I have no need for such features.

I thought the same until I borrowed a good microphone and started to make some RoomFit profiles.

Having a flat sound profile as basis for the EQ/PEQ has really improved the already good sound. Especially in the bas, that is now much more controlled and clean with any EQ and volume I use.

 

[Jian]

In fact, the latest firmware version of the Wiim Amp Ultra also has the same problem.

 

[hgo58]

In fact, the latest firmware version of the Wiim Amp Ultra also has the same problem.

If that's the case you should report it here in the thread 'WiiM Amp Ultra Firmware v5.2.726631 Update - Aug 18, 2025' https://forum.wiimhome.com/threads/wiim-amp-ultra-firmware-v5-2-726631-update-aug-18-2025.7968/

 

[Saponetto]

Just got update v4.8.726839.
Had to disconnect power supply in order to avoid it automatically updates to V4.8.726047.
I know that nothing changes, but had at least avoided to uselessly overwrite memory areas for a flawed update...