I’ve been very happy with the EverSolo DMP-A6 Master Edition that drives my secondary system. Although I prefer discrete and chip based R2R DACs, the ESS DAC in the A6 is very well implemented. The smartphone app, as also mentioned by Steve Huff in the video, is nicely done.
The only gripe I have with EverSolo is how slowly a large directory is opened on Mac with a SMB mount of the internal NVMe SSD.
Driving my primary system is a Hi-Fi Rose RS250. Its smartphone app is awful compared with EverSolo’s, but otherwise it’s a wonderful unit too. My only gripe with the Hi-Fi Rose is intermittent disconnection from the wireless network. This has been an on-again off-again problem with various software updates.
Nevertheless I’m quite eager to read more about the EverSolo A10. I love the design, including the volume knob/screen. Even if its built-in DAC is closer to neutral (per the video review), it has a parametric equalizer to compensate.
But parametric equalizers, in my limited experience, cannot compensate for that bit of grain in human voices that sigma-delta DACs seem to have, but not R2R DACs. (I don’t mean this as a general statement, but only an observation based on sigma-delta and R2R DACs that I have at home.)
Update 6 Nov:
Just performed an over the air firmware upgrade of Rose RS250 to 5.7.05, which seems to have fixed the Wi-Fi stability problem.