USB DAC - Vintage High-End Sound. Cayin RU7

Cayin's RU7 USB dongle DAC and headphone amplifier uses technology normally found in high-end audio CD players and DACs. I put it through its paces with IEMs and full-sized headphones, as well as compare it to the RU6 and Luxury&Precision W4.
I unboxed it in this video:    • Cayin RU7 1-bit USB Dongle DAC Unboxing  

You can get the RU7 from the following sites and help support my channel too:
Audio46: https://www.hear.audio/go/RU7Audio56
HiFiGo: https://www.hear.audio/go/RU7HiFiGo

Thank you to NativeDSD for sponsoring this review. Check out their extensive catalog of high-quality music.
https://nativedsd.com
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00:00 Start
01:49 What is a 1-bit DAC?
05:04 Power limitations
07:59 DSD Music
09:40 Listening impressions
15:13 Comparisons with other gear
21:12 Vs. the Chord Mojo
22:36 Overall Conclusions