WiiM Pro vs Pro Plus

[xed]

I'm wondering about the difference in the digital part between Pro and Pro Plus. I'd use WiiM mainly for optical to coaxial conversion and streaming. Are there any changes in that part, like a better clock or power supply? Everyone says there is nothing changed, but I'd rather ask. Thanks!

 

[onlyoneme]

So I will answer just like everyone - no changes in the digital part. Nothing I would be aware of.

 

[Matias]

Look at the jitter graphs for Toslink and Coax below, there is not much to improve on a bit perfect signal with lowest jitter.

WiiM Pro - Review & Measurements (Streamer)

WiiM Pro - Review & Measurements Hey folks, It is time for my first review of 2023... This one is about a complete objective analysis of the new WiiM Pro streamer. The aforementioned has been recently announced, back in November 2022, and I can see quite a strong hype around it since. That...

www.audiosciencereview.com

 

[onlyoneme]

Look at the jitter graphs for Toslink and Coax below, there is not much to improve on a bit perfect signal with lowest jitter.

WiiM Pro - Review & Measurements (Streamer)

WiiM Pro - Review & Measurements Hey folks, It is time for my first review of 2023... This one is about a complete objective analysis of the new WiiM Pro streamer. The aforementioned has been recently announced, back in November 2022, and I can see quite a strong hype around it since. That...

www.audiosciencereview.com

These tests won't tell too much about the jitter coming from the device when it's connected to DACs like ADI-2.

 

[steadyshot]

I would like to know also if there are some design changes - galvanic isolation on coax out etc… Probably not but not answered officially. For instance I cannot find in the manual of my integrated if coax in is isolated so I want this somewhere on the chain since I want to use coax for 192k output in my dac

 

[Matias]

These tests won't tell too much about the jitter coming from the device when it's connected to DACs like ADI-2.

Exactly. Looking at digital output alone it is already excellent (side bands below -155 dB), and when entering the DAC and going out as analog, it should be even more irrelevant/inaudible. As I was trying to point out: if the digital output is already excellent, the analog after the DAC more so, so how would the Pro Plus improve from that?

 

[onlyoneme]

Exactly. Looking at digital output alone it is already excellent (side bands below -155 dB), and when entering the DAC and going out as analog, it should be even more irrelevant/inaudible. As I was trying to point out: if the digital output is already excellent, the analog after the DAC more so, so how would the Pro Plus improve from that?

Well, not exactly. For example, you would observe the same excellent quality of the Mini digital output and of the Pro output when both are connected to ADI-2, but it does not mean that both devices can produce signal of the same quality.
There is no point in evaluating the problems that your instrument eliminates at the same time.

 

[steadyshot]

Look at the jitter graphs for Toslink and Coax below, there is not much to improve on a bit perfect signal with lowest jitter.

WiiM Pro - Review & Measurements (Streamer)

WiiM Pro - Review & Measurements Hey folks, It is time for my first review of 2023... This one is about a complete objective analysis of the new WiiM Pro streamer. The aforementioned has been recently announced, back in November 2022, and I can see quite a strong hype around it since. That...

www.audiosciencereview.com

My internal dac does not reject jitter and I cannot add an external dac because I will worsen the snr - since my dac signal goes directly to the power amp section of my integrated - shorter path is preferred. External dac goes through the pre amp stage first. Either have optical with more more jitter input to my dac and up to 96k or coaxial with significant less jitter dac side but maybe more noisy and up to 192k

 

[onlyoneme]

My internal dac does not reject jitter

How did you deduce it?

Either have optical with more more jitter input to my dac and up to 96k or coaxial with significant less jitter dac side but maybe more noisy and up to 192k

And this and that?

 

[Mr Ee]

My internal dac does not reject jitter and I cannot add an external dac because I will worsen the snr - since my dac signal goes directly to the power amp section of my integrated - shorter path is preferred. External dac goes through the pre amp stage first. Either have optical with more more jitter input to my dac and up to 96k or coaxial with significant less jitter dac side but maybe more noisy and up to 192k

I think you're worrying far too much about Roksan's additive noise comment.
Do you have 1m speaker cables...?

 

[tgf427]

Inside pics would be helpful. I doubt anybody will do a full comparison Teardown.

 

[VintageFlanker]

Why keep asking when WiiM themselves said that there's no change on the digital part?

 

[steadyshot]

How did you deduce it?

And this and that?

Hi @onlyoneme . Thanks for your response.

According to injected jitter j tests on : https://www.soundstagenetwork.com/i...ts&catid=97:amplifier-measurements&Itemid=154

According to specs optical is capped at 24/96.

And roksan response about the dac paths ( in screenshot )

 

[steadyshot]

Why keep asking when WiiM themselves said that there's no change on the digital part?

I have probably did not see the response from Wiim

 

[steadyshot]

I think you're worrying far too much about Roksan's additive noise comment.
Do you have 1m speaker cables...?

2.5m each

 

[onlyoneme]

Hi @onlyoneme . Thanks for your response.

According to injected jitter j tests on : https://www.soundstagenetwork.com/i...ts&catid=97:amplifier-measurements&Itemid=154

According to specs optical is capped at 24/96.

And roksan response about the dac paths ( in screenshot )

Have you also seen this, line in vs digital in?

 

[Brantome]

I think you're worrying far too much about Roksan's additive noise comment.

Totally as a humorous aside, does it also turn on the red light?

 

[Mr Ee]

Totally as a humorous aside, does it also turn on the red light?

It can, but it doesn't have to.

 

[steadyshot]

Have you also seen this, line in vs digital in?

View attachment 2027

What can I do about it ?

 

[onlyoneme]

It shows that your device can perform better on analog inputs compared to digital in terms of noise floor.