«If you use the App and Toslink output, you basically have a transparent wireless link to your stereo. Connect it to your favorite DAC and your performance will only be limited by the rest of your system.» AmirM in post #1
This can’t be the entire truth. Wiim Mini will always be the master clock and has no way of improving the clock, other then hoping that the external dac is good at re-clocking the incoming signal.
The Wiim Ultra on the other hand, can output via USB and then the external DAC can be the master clock.
The biggest weakness of Wiim streamers, besides the crappy internal dac, is the crappy internal clock.
In the following youtube link the Cheapaudiophileman saw a big improvement using an external dac with the Wiim Ultra just by using a $60 DDC:
Not sure why he had to do that if he was using an external dac. Maybe he was too cheap with the dac. I better watch it again!