WiiM Ultra Phono Stage

[harkpabst]

I did not try changing the setting to MM.

And there's no point in trying, of course. I don't think @hgo58 suggested to switch from MC to MM, but mainly pointed out that those using the MM gain setting mostly find it very usable.

Sampling rate has remained at 24/96.

24/96 is not the default for line in/phono in. You have to explicitly change it to that value. Once, at least. While the exact reason is still not entirely clear, some have reported the default ADC setting aof 16/44.1 to cause crackling noise. So, RFI, boosted due to the higher gain, is not the only possible cause of popping or crackling noise. If you set the line in resolution to 24/96 already, there's nothing left to gain from 24/192.

We also don't really know the input impedance and capacitance of the Ultra's phono input, yet. Even less, if it is really different between MM and MC (as it should be).

 

[canard]

And there's no point in trying, of course. I don't think @hgo58

We also don't really know the input impedance and capacitance of the Ultra's phono input, yet. Even less, if it is really different between MM and MC (as it should be).

obvious questions asked since last June/July....

 

[guy48065]

obvious questions asked since last June/July....

But Wiim customer support has been SO responsive to almost every other issue.

 

[hgo58]

And there's no point in trying, of course. I don't think @hgo58 suggested to switch from MC to MM, but mainly pointed out that those using the MM gain setting mostly find it very usable.


24/96 is not the default for line in/phono in. You have to explicitly change it to that value. Once, at least. While the exact reason is still not entirely clear, some have reported the default ADC setting aof 16/44.1 to cause crackling noise. So, RFI, boosted due to the higher gain, is not the only possible cause of popping or crackling noise. If you set the line in resolution to 24/96 already, there's nothing left to gain from 24/192.

We also don't really know the input impedance and capacitance of the Ultra's phono input, yet. Even less, if it is really different between MM and MC (as it should be).

This is what WiiM specified

Gain: 41dB MM / 59dB MC
MM: THD+N -75dB，SNR 76dB@5mV;
MC: THD+N -58dB,SNR 56dB@0.5mV
RIAA accuracy: < ±0.5dB / 20Hz - 20kHz

And from the below review we got:

Phono MM: low noise (78 dB), amplification 42 dB, input impedance 54 Kohm/ 0 pF.

But nothing about MC.

WiiM Ultra Review « 7Review

If your summer isn't as exciting as you hoped, consider adding some fun with the WiiM Ultra streaming device. This sleek gadget has a lot to offer to music

7review.com

Other reviews state that the MC input is very noisy.

WiiM Ultra Streamer Preamp ASR Review - Hifistudio79 voor de beste Audio Hifi

This is a review and detailed measurements of the WiiM Ultra network streamer, DAC, phono stage and preamplifier. Physical attribute are modern and attractive enough. Alas, I can’t say the same thing about the graphical interface. Icons seem dated to me. They are also superfluous to what is in...

www.hifistudio79.nl

The Phono input on the WiiM Ultra is convenient but if you are serious about vinyl, I would use a high end MC pre-amp directly into an amplifier.

 

[harkpabst]

This is what WiiM specified

Gain: 41dB MM / 59dB MC
MM: THD+N -75dB，SNR 76dB@5mV;
MC: THD+N -58dB,SNR 56dB@0.5mV
RIAA accuracy: < ±0.5dB / 20Hz - 20kHz

And from the below review we got:

Phono MM: low noise (78 dB), amplification 42 dB, input impedance 54 Kohm/ 0 pF.

But nothing about MC.

WiiM Ultra Review « 7Review

If your summer isn't as exciting as you hoped, consider adding some fun with the WiiM Ultra streaming device. This sleek gadget has a lot to offer to music

7review.com

Other reviews state that the MC input is very noisy.

WiiM Ultra Streamer Preamp ASR Review - Hifistudio79 voor de beste Audio Hifi

This is a review and detailed measurements of the WiiM Ultra network streamer, DAC, phono stage and preamplifier. Physical attribute are modern and attractive enough. Alas, I can’t say the same thing about the graphical interface. Icons seem dated to me. They are also superfluous to what is in...

www.hifistudio79.nl

The Phono input on the WiiM Ultra is convenient but if you are serious about vinyl, I would use a high end MC pre-amp directly into an amplifier.

Yes, as I said: No information on input resistance and input capacitance.

 

[Luke lin]

Learned from WiiM that phono input impedance 47 Kohm/ 100 pF

 

[guy48065]

Does anyone make an external little box with connections inside for loading a phono cartridge? Inline.

In addition to the noise issues for MC input you also have inappropriate loading.