WiiM Sub Pro Firmware v5.2.736145 Update - Nov 20, 2025

Please review the WiiM Sub Pro 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.

5.2.736145 (Latest)​

Release date:

11 / 20 / 2025

What's New:

1. Sound Level: Optimized the volume meter for clearer and more balanced sound at low volumes.
2. Standby: Resolved an issue where Sub Pro could enter standby during playback.

 

[adias]

@WiiM Team - can you please explain the Sound Level fix? Meaning?

 

[QuarryHunslet]

My Sub Pro has just received this firmware update.

 

[QuarryHunslet]

Just a heads up in case anyone else has an issue after this update.

I turned my Ultra on from standby to see if I could tell any difference with my Sub Pro, and started one of my preset stations, and no sound was coming out of my speakers, but the Sub Pro was working.

A reboot of the Ultra has restored the sound from my speakers.

Whether this was as a direct result of this Sub Pro firmware update, I don’t know, but it is the first time that I have had no sound from my speakers after turning my Ultra on from standby.

 

[Burnside]

Mine was fine, but I do switch off all my gear overnight anyway (most are on smart plugs).

 

[QuarryHunslet]

Mine was fine, but I do switch off all my gear overnight anyway (most are on smart plugs).

It might have just been a coincidence, but it’s not something that has happened before this update.

 

[Burnside]

It might have just been a coincidence, but it’s not something that has happened before this update.

Yeah, or it’s maybe because I’m in effect power cycling my gear daily so any post firmware update issues are implicitly resolved