Cayin RU6 USB Audio DAC/AMP Review

Some people consider the Cayin RU6 to be the best USB-C "dongle DAC" available. Why is that so? Because it uses an R2R DAC -- a first in such a tiny design. I take you through the technology, functionality, and my impressions of how it sounds.
The IEMs in the b-roll footage are from Audio Dream in Brazil.
/ audiodreambrasil
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00:00 Start
01:18 About R2R DACs
06:16 The Case
09:04 RU6 Functionality
10:42 Sound Impressions
16:26 Vs. Modi Multibit
19:29 Conclusion and Thank You