Wiim Pro+ OPAMP replace

I have a rev. 2 board version.

Hmmm.... Does that change how, why, or even if I should consider the op-amp upgrade ? Was the bass distortion issue addressed with a software or firmware edition for my unit and earlier units or are we just out of luck ?
 
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brjoon1021 said:
I have a rev. 2 board version.

Hmmm.... Does that change how, why, or even if I should consider the op-amp upgrade ? Was the bass distortion issue addressed with a software or firmware edition for my unit and earlier units or are we just out of luck ?
Click to expand...
Which “bass distortion issue”?
 
I learned about it here and at the dreaded ASR. There was a revision 3 PCB to deal with it. If I recall correctly it was low frequency distortion. I have not looked at it in a while because I thought I had a newer revision, but I have the one before the fix.
 
brjoon1021 said:
I learned about it here and at the dreaded ASR. There was a revision 3 PCB to deal with it. If I recall correctly it was low frequency distortion. I have not looked at it in a while because I thought I had a newer revision, but I have the one before the fix.
Click to expand...
The your version? Thanks
 
kirkoff,
I have PCB 2
Here is something about it. I think discussion might follow

www.audiosciencereview.com

WiiM Pro Plus Streamer Review

This is a review and detailed measurements of the WiiM Pro Plus streamer, DAC and preamplifier with Bluetooth support. It was sent to me by the company and costs US $219. While the case is plastic, it still "looks the part" as the Brits would say relative to other more famous brands of...
www.audiosciencereview.com www.audiosciencereview.com
 
brjoon1021 said:
kirkoff,
I have PCB 2
Here is something about it. I think discussion might follow

www.audiosciencereview.com

WiiM Pro Plus Streamer Review

This is a review and detailed measurements of the WiiM Pro Plus streamer, DAC and preamplifier with Bluetooth support. It was sent to me by the company and costs US $219. While the case is plastic, it still "looks the part" as the Brits would say relative to other more famous brands of...
www.audiosciencereview.com www.audiosciencereview.com
Click to expand...
Thanks.
From V03 is ok? The improvements in v04 respect V03? Do you know? Thanks
 
Finally changed opapmp too.
With OPA1611 lower frequencies gave wow effect 🤩 So much better bass extension and articulation.
"shhh" from vocals feels sliiightly less annoying. Satisfied more with this mod, very nice soundstage.

Thanks for advice on this forum 👌

PXL_20240130_100520601.jpg
 
recognize that the thing that would be most relevant would be to be able to compare an unmodified "plus" and one in 1611 on demanding audio files of acoustic type and in uncompressed quality..
but I do not believe that in the future wiim will no longer be required save on the 1611 on its future products or the modern 553* even if 1611 is noticeably more expensive
;-)
 
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Did all of these units have SE5534 ? I recall reading (I think) that they ran out of 1611 at one point ? Maybe some already have those ?
 
brjoon1021 said:
Did all of these units have SE5534 ? I recall reading (I think) that they ran out of 1611 at one point ? Maybe some already have those ?
Click to expand...
I have never heard this story and all the actors in this thread point to 5534.. simply open your machine and observe which AOP you have installed
;-)
 
TI has discontinued the 5534. WIIM will have to look for an alternative over time. Fortunately, there are plenty.
 
a 1611 is near 4 times more expensive....
(but we find it, it seems to me, now in standard even on modest DACs at 80 dollars ,same akm base etc... evb akm in sym with dual 1612)
 
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Doublej said:
hmm, perhaps WiiM will offer a Pro Plus Special Edition with these upgrades.
Click to expand...
That would be nice, but I believe the will not do it because of marketing reason. The coming WiiM ultra will probably have opa1611 or 1612 ( my five cents ) .
 
Doublej said:
I hope so!
Click to expand...
If there are ne5534 in the Ultra it would be a compromise. The competition in form of eversolo dmp a6 use better ICs than 5534.

(Edit : Eversolo dmp a6 standard uses opa1642 and the signature model uses opa1612.)
 
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