My Ultra tests

[onlyoneme]

This is onlyoneme:s measurement with WiiM ultra of the waveforms over the digital coax output, tested with the oscilloscope and 192 kHz sample rate test signal, and terminated at 75 ohms.

Again - really good performance .
I havent seen any other product regardless of price performing any better than this through spdif coaxial .

View attachment 9551

Give me a week or so, I'm gonna prepare something unseen regarding digital outputs.

 

[onlyoneme]

Onlyoneme :
If the WiiM ultra is earthed ( you have the earthed pinhole on the WiiM ) - does the overall sinad improve ?

As far as I remember, no.

 

[onlyoneme]

As far as I remember, no.

My memory is not good any longer.
Results are slightly better when grounded, noise level is reduced. It's about 3 dB difference in case of sinad.
There is no difference when an LPF is used.

 

[Steve Woodhouse]

My memory is not good any longer.
Results are slightly better when grounded, noise level is reduced. It's about 3 dB difference in case of sinad.
There is no difference when an LPF is used.

View attachment 9559

Both below the threshold of human audibility, so no issue.

 

[onlyoneme]

I just read that sinad measurement alone is enough to say if two DACs sound the same ot not. Pure ASR style.

A new content added BTW.

 

[Steve Woodhouse]

I just read that sinad measurement alone is enough to say if two DACs sound the same ot not. Pure ASR style.

A new content added BTW.

No one said that. Yet another in a long line of strawmen.

 

[onlyoneme]

"Basically - we can select from the Blue and green sections of the chart here, and stop worrying about how a DAC sounds."

 

[Musician]

My memory is not good any longer.
Results are slightly better when grounded, noise level is reduced. It's about 3 dB difference in case of sinad.
There is no difference when an LPF is used.

View attachment 9559

This seems to be a common problem with smps , the results often gets better with extra grounding

 

[Musician]

My memory is not good any longer.
Results are slightly better when grounded, noise level is reduced. It's about 3 dB difference in case of sinad.
There is no difference when an LPF is used.

View attachment 9559

So , extra grounded the SINAD for the Ultra is 113 dB instead of 110 dB ?
Its getting better

 

[onlyoneme]

New j-test measurement after the latest FW update.

 

[harkpabst]

Is the new 1 kHz measurement still with the LPF engaged?

 

[onlyoneme]

Is the new 1 kHz measurement still with the LPF engaged?

Yep.

 

[harkpabst]

Yep.

I was pretty sure it was (everything else would have been a bit of a miracle, even if a welcome one) but thought I'd ask for clarification.

An improvement, nonetheless, in both cases.

 

[onlyoneme]

I like when a "transparent" device becomes more transparent

 

[Smartplug]

I like when a "transparent" device becomes more transparent

Mr clean on top of Mr clean.

 

[Cal_Cobra]

I've been listening to my Ultra most of my WFH day, mostly Amazon Music but also checking out Tidal. Amazon has been better behaved, with only a few hick-ups, with [typically] fairly quick recovery, but it does sound, well, clean

 

[Smartplug]

I've been listening to my Ultra most of my WFH day, mostly Amazon Music but also checking out Tidal. Amazon has been better behaved, with only a few hick-ups, with [typically] fairly quick recovery, but it does sound, well, clean

This will be my last wiim product as I have mini, pro, amp and ultra. One particular feature I like on ultra that you can connect to external dac and can use sub. Wish usb can do this.

 

[onlyoneme]

What if only successor can do USB audio and sub?

 

[Smartplug]

What if only successor can do USB audio and sub?

I will buy it as soon it get release! USB is my preferred connection whether it has or no benefits over spdif.

 

[Steve Woodhouse]

I like when a "transparent" device becomes more transparent

The old readings were below human audibility, so it hasn’t become more transparent.