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.

 

[gasolin75]

Flat: To me is brightest,most open,clear and lacks bass adjusts 48hz to 4khz (suggestion a little more bass) Reamne it to flat or clear ?
Might sound clearer do to not having alot of bass 4 khz up not adjusted

Harman: Very fullbodied (bass) adjusts down to 40hz and max is 3.3 khz (suggestion a little less bass) reaname it to bass ?

B&K: It does something to the midrange a little louder,fuller not bright despite enhancing 17khz alot (i guess i can't hear that high), despite that, flat sounds brighter,clearer,more open, B&K has a little more bass then flat, adjust 73-17.1khz Yamaha ns-10 midrange setting ? Rename it to yamaha ns-10 ?

Flat and harman is what i would use and adjust in the eq if i need to

 

[dominikz]

Flat: To me is brightest,most open,clear and lacks bass adjusts 48hz to 4khz (suggestion a little more bass) Reamne it to flat or clear ?
Might sound clearer do to not having alot of bass 4 khz up not adjusted

Harman: Very fullbodied (bass) adjusts down to 40hz and max is 3.3 khz (suggestion a little less bass) reaname it to bass ?

B&K: It does something to the midrange a little louder,fuller not bright despite enhancing 17khz alot (i guess i can't hear that high), despite that, flat sounds brighter,clearer,more open, B&K has a little more bass then flat, adjust 73-17.1khz Yamaha ns-10 midrange setting ? Rename it to yamaha ns-10 ?

Flat and harman is what i would use and adjust in the eq if i need to

Just remember that your listening impressions are impacted by the anechoic response of your specific loudspeakers being modified in mid and high frequencies, since you are running RoomFit full-range (something I wouldn't recommend in the vast majority of cases).

This means that other people using different loudspeakers in different rooms with different RoomFit settings might also have different impressions when using the same targets.

 

[gasolin75]

As mentioned not all target curve goes down to 20-30 hz or up to 17-20khz

 

[slartibartfast]

as mantioned not all target curve goes down to 20-30 hz or up to 17-20khz

All the target curves cover the full frequency range. Why do you think they don't?

 

[gasolin75]

They don't adjust all the way from 20 to 20khz Flat it only does adjustments from 48hz to 4khz

 

[slartibartfast]

They don't adjust all the way from 20 to 20khz Flat it only does adjustments from 48hz to 4khz

The target curve still covers the whole range. Your correction may not follow the target curve but that is a different issue.

 

[harkpabst]

They don't adjust all the way from 20 to 20khz Flat it only does adjustments from 48hz to 4khz

Picking the target curve is one step.

Choosing the frequency range in which RoomFit will try to follow the target curve is a separate setting. The lower limit and the higher limit can be set independently. RoomFit will still apply some amount of intelligence and not waste peak filters on irrelevant frequencies.

The intention of room correction (done right) is not to adjust the sound to some fixed target. It aims at removing disturbances due to certain room effects without decreasing the general sound quality.

 

[gasolin75]

Update i had an eq on all the time for my in ear headphone so i had to do roomcorection again

Flat: Open and clear not to much bass (sound like the subwoofer is off), mabye less bass helps it to sound more open,clear, adjusts from 50hz to 1.29khz

B&K: A little more bass then Flat, mabye a little more midrange (513hz + 5.6db), midrange,upper midrange,lower treble are not bright,sharp (slightly lowered, it's got a little bbc dip with my speakers), only adjusts from 50hz to 4.1khz

Harman: Most bass under 80hz, highs are enhanced alot around 10-20khz adjusts from 62hz to 20khz, can't hear the super high enhanced highs (16-20 khz is enhanced most but is already in my system,adjustment above 0db at 5000hz) Doesn't sound as clear, open,bright ish as flat

1: B&K clear open more bass then flat (50hz to 4.1khz)
2: Harman most bass almost makes bookshelfs speakers sound like floorstand speakers, like my sub is on (62hz to 20khz)
3: Flat is bass light and open clear (50hz to 1.29khz)

Does the roomcorrection turn off when i disable wifi on the unit i use for controlling the sound from my amp ?

 

[slartibartfast]

Update i had an eq on all the time for my in ear headphone so i had to do roomcorection again

Flat: Open and clear not to much bass (sound like the subwoofer is off), mabye less bass helps it to sound more open,clear, adjusts from 50hz to 1.29khz

B&K: A little more bass then Flat, mabye a little more midrange (513hz + 5.6db), midrange,upper midrange,lower treble are not bright,sharp (slightly lowered, it's got a little bbc dip with my speakers), only adjusts from 50hz to 4.1khz

Harman: Most bass under 80hz, highs are enhanced alot around 10-20khz adjusts from 62hz to 20khz, can't hear the super high enhanced highs (16-20 khz is enhanced most but is already in my system,adjustment above 0db at 5000hz) Doesn't sound as clear, open,bright ish as flat

1: B&K clear open more bass then flat (50hz to 4.1khz)
2: Harman most bass almost makes bookshelfs speakers sound like floorstand speakers, like my sub is on (62hz to 20khz)
3: Flat is bass light and open clear (50hz to 1.29khz)

Does the roomcorrection turn off when i disable wifi on the unit i use for controlling the sound from my amp ?

Why don't you turn your sub on? It will relieve your main speakers of low frequency duties and doesn't require excessive boost at low frequencies that reduces headroom.

 

[gasolin75]

The intention of room correction (done right) is not to adjust the sound to some fixed target. It aims at removing disturbances due to certain room effects without decreasing the general sound quality.

Thats what i missed with my yamaha amp

Adjusting it either to a different target cuve then flat or eq after roomcorrection without disabling roomcorection

Harman target curve for shure gives me more bass than the stock (not possible to change it) YPAO target curve

Think one good target curve no eq, is better then having to enable eq after a "flat" target curve

Later i have to try roomcorrection with my sub, for now i don't feel the need to use my sub

 

[gasolin75]

Why don't you turn your sub on? It will relieve your main speakers of low frequency duties and doesn't require excessive boost at low frequencies that reduces headroom.

Have no problems playing loud, the amp don't distort when playing 100%, my speakers don't distort at 100%

Bass is great

As mentioned later i have to try roomcorrection with my sub, for now i don't feel the need to use my sub

Again 3 curves flat,B&K and Harman with sub

My speakers have 40% higher excursion than similar sized speakers and can handle 150 watt, a wiim amp PRO is not to much

 

[slartibartfast]

Have no problems playing loud, the amp don't distort when playing 100%, my speakers don't distort at 100%

Bass is great

As mentioned later i have to try roomcorrection with my sub, for now i don't feel the need to use my sub

My speakers have 40% higher excursion than similar sized speakers and can handle 150 watt, a wiim amp PRO is not to much

Can you show a screenshot of your RoomFit filters? To avoid distortion completely you need to limit the volume in Audio Settings. WiiM implement a limiter to make the clipping less audible.

 

[gasolin75]

shure later

wim amp PRO just don't distort at 100%, asr say as i remember it, that it might have a limiter

 

[slartibartfast]

shure later

wim amp PRO just don't distort at 100%, asr say as i remember it, that it might have a limiter

It doesn't distortion at 100% if you don't use EQ, that is true.

 

[gasolin75]

 

[gasolin75]

It doesn't distortion at 100% if you don't use EQ, that is true.

No just generally at 100% volume

 

[dominikz]

No just generally at 100% volume

View attachment 26379

View attachment 26380

Yes, but what happens if you have volume at 100% + an enabled PEQ filter with +12dB of gain, while at the same time reproducing content with 0dBFS peaks? That would take the peaks up to 12dB over 0dBFS, which in case of WiiM devices results in dynamic range compression (limiting) and would therefore increase distortion during transients.

This is what @slartibartfast suggested.

The Amp Pro never goes into distortion only if you don't consider cases such as above (e.g. no positive gain EQ, or positive gain EQ + volume limiting). Alternatively it can still be driven to distort.

Since all of your RoomFit profiles have some positive gain it is absolutely possible that your amp would distort at some point if you used it at 100% volume with these RoomFit profiles enabled.

 

[gasolin75]

Yes, but what happens if you have volume at 100% + an enabled PEQ filter with +12dB of gain, while at the same time reproducing content with 0dBFS peaks? That would take the peaks up to 12dB over 0dBFS, which in case of WiiM devices results in dynamic range compression (limiting) and would therefore increase distortion during transients.

This is what @slartibartfast suggested.

The Amp Pro never goes into distortion only if you don't consider cases such as above (e.g. no positive gain EQ, or positive gain EQ + volume limiting). Alternatively it can still be driven to distort.

Since all of your RoomFit profiles have some positive gain it is absolutely possible that your amp would distort at some point if you used it at 100% volume with these RoomFit profiles enabled.

That's why you on a wiim amp Pro have RoomFit settings (they have thought about just everything you could want,need)

 

[dominikz]

That's why you on a wiim amp Pro have RoomFit settings (they have thought about just everything you could want,need)


View attachment 26381

Dynamic limiting and distortion can indeed be avoided by using appropriate settings; my intention was just to explain that distortion *can* happen when using heavy EQ boosts (e.g. like in your post #55).

 

[gasolin75]

#59

Also depends on how Q is