That's the expected behaviour.
I suggested this as a test if the USB hardware in the Ultra is working at all. Apparently it is.
Connecting external dac to ultra
- Thread starter Bozzz
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I suggested this as a test if the USB hardware in the Ultra is working at all. Apparently it is.
OK, today I will check all connections again and let you know
Can you post a photo of what it shows in your Fiio's wiim application?
there is probably something wrong with the Fiio because I connected it to the laptop and very strange things are happening on the display... it starts blinking quickly and there is no interaction with the laptop... it is going to be returned
Mr Ee
Major Contributor
EddNog
Senior Member
Have you set Input on K11 R2R to USB? With many DACs, the USB module is not activated until USB input is selected, and if the USB module is not activated, the WiiM won't see it.Unfortunately, in my case the USB output does not work when connected to Fiio K11 R2R - I have already performed all possible tests... it still does not detect this connection
-Ed
Of course I set it that way. I already sent the Fiio back - its USB port was damaged - I only discovered it after connecting it to my laptop. After connecting coax and optical, it played very nicely. I also ordered: Ifi Zen Dac 3 and Topping E30 II for testing. I'm curious how they will sound in my system - if not better than Fiio, I will order it again.
Interested to hear the outcome of your assessment as I'm toying with ordering the K11 R2R myself.
I do not know about that DAC but I am very familiar with high quality R2R DACs. They all require long term temperature stability. To judge that unit keep on at least 48h and listen then. And… if turned off and cooled down, they need another long warmup period.I ordered a new Fiio ... now everything is OK - it works as it shouldI now have 3 DACs to test
So far neither IFI Dac Zen 3 nor Topping E30 II impressed me .... now I will check directly with Fiio
Some proper audiophilia right there!
Mr Ee
Major Contributor
I’m certainly not doubting that an R2R DAC changes behavior with temperature.
Back in the day when I had a big Tandberg class AB power amp things didn’t sound right the first half hour after switching on, and I would think these R2R dacs are even more vulnerable to temperature changes.
Back in the day when I had a big Tandberg class AB power amp things didn’t sound right the first half hour after switching on, and I would think these R2R dacs are even more vulnerable to temperature changes.
slartibartfast
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So does the performance of an R2R DAC depend on room temperature as well so they sound different at different times of the year?
Within reason (say, ambient between 15-25C) likely not, once the resistor ladder is temp stabilized.
Some high end R2R DACs have components in a controlled ’oven’.
hgo58
Major Contributor
As this DAC don't have better specifications than the WiiM Ultra and uses same DAC chipset, what is the difference in sound quality? Is it better or just different?
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In hifi new and different is better isn’t it?
hgo58
Major Contributor
Maybe? I am just curious about why so many people prefer adding an external DAC to the WiiM Ultra.
