WiiM Amp Pro Firmware v5.2.726630 Update - Aug 18, 2025

Please review the WiiM Amp 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.

5.2.726630 (In Progress)​

Release date:

8 / 18 / 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. Amazon Music: Bitrate information is now displayed when streaming Amazon Music Prime.
4. Sub Pro Intergartion: Improved pairing experience and overall functionality when using the Sub Pro.
5. YouTube Music: Native, seamless streaming support. (requires the upcoming app version 3.3.1).
6. Soundtrack SDK Upgrade: Under-the-hood improvements for a smoother, more consistent listening experience.

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.
   • Corrected low volume when playing Dolby Digital content.
3. 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.
4. Playing Status: Corrected the playback status indicator when no music is playing.
5. Qobuz: Now displays the correct artist name in the app during playback.
6. Bluetooth Output: Fixed a no-audio issue after switching outputs.
7. NAS & USB Playback: Playback now correctly restarts from the beginning after the last track finishes.
8. Playback Speed: Resolved rare cases where songs played at accelerated speed.

 

[flxy]

I believe this bug does not affect _all_ Bluetooth connections, as otherwise there would have been an uproar from users.
It might happen under certain circumstances, non-matching version protocols..etc.

I went on holiday and if this bug isn't confirmed by the developers by the time I am back, I will send them the logs and will try upgrading OpenElec on my Raspberry Pi to a newer version. Even if it helps, though, the developers need to fix this issue, as it is a regression.

 

[vaclavmoravek]

This update broke the volume amplification via HDMI Arc when I have the Optical input active. My configuration -> Nvidia Shield Pro - USB DAC -> Optical input Wiim Amp Pro. And at the same time, on a Sony TV via HDMI Arc to the Wiim Amp Pro input. With the previous version, I could amplify via the TV controller Wiim amp pro even though I had the optical input set to Wiim :-( Please bring it back.

 

[gasolin75]

What i would like to be added if possible (if posting here is the right place i don't know)

I would like more roomfit target curves and at least 3 to choose from after adjustment (should be possible but havning figured out how)

Custom curves the room corretion tries to adjsut to woul be nice, harman to me is a little to much bass, like 2 variant of harman 1 norma 2 a little less bass

 

[slartibartfast]

What i would like to be added if possible (if posting here is the right place i don't know)

I would like more roomfit target curves and at least 3 to choose from after adjustment (should be possible but havning figured out how)

Custom curves the room corretion tries to adjsut to woul be nice, harman to me is a little to much bass, like 2 variant of harman 1 norma 2 a little less bass

You can already save multiple RoomFit profiles and switch between them. You should also experiment with stereo vs individual channel. B&K target for individual channel will result in more bass than B&K for stereo but less than Harman.

 

[gasolin75]

I don't want B&K since it's surpose to enhance lower treble, which i do not at all want

Have lowered 31,63 and 125hz by 1 db and seems (sounds) better

 

[slartibartfast]

I don't want B&K since it's surpose to enhance lower treble, which i do not at all want

Have lowered 31,63 and 125hz by 1 db and seems (sounds) better

It doesn't enhance lower treble

 

[gasolin75]

It doesn't enhance lower treble

Here is what ai told me (you can't disable ai 100%)

 

[goodmore]

Here is what ai told me (you can't disable ai 100%)

View attachment 26283

The last time I looked at the guide provided by WiiM it was outdated. There are how many settings? 10? An explanation for each setting and what it does should not be an unreasonable request.

 

[slartibartfast]

Here is what ai told me (you can't disable ai 100%)

View attachment 26283

Probably better to look at the target curve yourself than believe anything AI tells you.

 

[gasolin75]

Optimizing Your Audio Experience: A Comprehensive Guide to RoomFit™ Room Correction

TABLE OF CONTENTS What's Room Correction The Benefits of Room Correction Room Correction vs. EQ Preparations for Room Correction Step-by-Step Guide to Room Correction Stereo Room Correction Individual Channel Room Correction What's R...

faq.wiimhome.com

It say (wonder why i asked google)

Target Curve: Choose the desired frequency response curve before room correction.

That's it, no explanation of how they change the sound

 

[slartibartfast]

Optimizing Your Audio Experience: A Comprehensive Guide to RoomFit™ Room Correction

TABLE OF CONTENTS What's Room Correction The Benefits of Room Correction Room Correction vs. EQ Preparations for Room Correction Step-by-Step Guide to Room Correction Stereo Room Correction Individual Channel Room Correction What's R...

faq.wiimhome.com

It say (wonder why i asked google)

Target Curve: Choose the desired frequency response curve before room correction.

That's it, no explanation of how they change the sound

View attachment 26285

Just try all three and listen. It would take five minutes to save all three as profiles. Harman is probably more difficult to achieve without a subwoofer. Posts about room correction by @dominikz contain a lot of good advice.

 

[gasolin75]

it failed on me saving the 3 proiles falt harman and B&K

 

[dominikz]

Here is what ai told me (you can't disable ai 100%)

View attachment 26283

Unsurprisingly, AI unfortunately doesn't understand the subject so missed the mark by a mile. :/

"Flat" target, if used for room EQ based on in-room steady-state response measurement, is absolutely not neutral nor uncolored.

However I see how this can be confusing, since "Flat" is a good target for on-axis response of a loudspeaker in anechoic conditions.

Note that conventional front-firing box loudspeakers that are well designed only have the flat response in one direction: on-axis.
But all loudspeakers radiate sound in all directions, and off-axis responses of most loudspeakers have progressively less high-frequency energy. I.e. they exhibit increasing directionality with frequency.

So using such loudspeakers in typical rooms always result in some reflected energy as well, i.e. off-axis sound combines with direct on-axis sound at the listening position.

As a result, in-room steady-state responses of such loudspeakers in typical rooms will be downward-sloping. Therefore it only makes sense to also use downward sloping targets when doing room EQ, since that preserves the "flat" on-axis direct sound and is perceived as neutral; whereas using a flat target in room EQ would make the on-axis sound from the loudspeaker upward-sloping and therefore bright.

Note that both the "Harman" curve and the "B&K" curve are actually an average result of many in-room responses of well-designed loudspeakers - they were not originally intended as targets for room EQ.
Neither was the "flat" target, mind you, but from the explanation above it should be hopefully clear why the other two are more suitable for this purpose in most cases.

In case you're interested to learn more about the topic I can highly recommend the amazing book "Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms" by dr. Floyd Toole.

Hope this was helpful!

 

[slartibartfast]

it failed on my saving the 3 proiles falt harman and B&K

When and how did it fail? I have at least 10 saved profiles.

 

[gasolin75]

I don't rememeber, im not shure, it just happend

I thing i had no + for adding more profiles so the current profile Harman got swapped by accident with flat

 

[slartibartfast]

I don't rememeber, im not shure, it just happend

I thing i had no + for adding more profiles so the current profile Harman got swapped by accident with flat

View attachment 26288

So do you only have one profile and can't save more? Even if you don't save a new profile I think it should appear as a profile named "Auto"

 

[gasolin75]

not shure, i have to do roomcorrectiion again with one of the 2 remaining targets enabled and try to save it without the saved profile beeing swapped by the new roomcorrection

 

[Wiimer]

not shure, i have to do roomcorrectiion again with one of the 2 remaining targets enabled and try to save it without the saved profile beeing swapped by the new roomcorrection

When you are finished evaluating RoomFit, tap Save Profile.
(Note that tapping Skip here will overwrite the 'Auto' profile.)


Tap New Profile.


Enter a file name and tap Create.


Finally, tap Done to create a new profile.

 

[gasolin75]

I will try that

My goal is neutral mids and highs with close to the same bass as harman but not quite as much (so fare 31-125hz is down by 1.5db,. bass is still above avarage) i might try -2db

Room correction does a good job of helping me getting me more,most bass out of my speakers (rated down to 40 hz and 150 watt), in fact so much with harman i don't feel the need to use my subwoofer, much better than YPAO (good job wiim)

 

[gasolin75]

I tried the B&K target curve and it's very nice