Well most phones people have do not work with Onix unless comnected to auxiliary power. That has been considered a negative to an otherwise excellent and great sounding dac. You don't happen to have one of those incompatible phones would you?
Hmmm.
Seems to work fine w Apple iPhones.
Apple is the most popular brand of phone out there today.
Then you have your mix of Android phones. You could probably go down the list of Android phones and find many that are compatible.
(Note: Not getting into the Android vs Apple debate. Its about a single brand's popularity)
Also consider that many will use this dac w a laptop or PC.
And while power isn't the issue w a PC... the quality if the USB port comes into play.
Here I ran into an issue.
Directly off my laptop USB-C port. (M1Max Apple Macbook) no issues. ( Change settings w the Midi App and can send it 32bit 768Hz, the max that the Alpha can do)
When I tried it off my docking block... not recognized. When I tried the apple dongle... the sound was carp. [sic] Showed up as a realtek device. No issues when directly connect to the laptop. (Note: Powering both Dita Project M iem, and M&D's MW65 headphone.)
Sorry I digressed.
The point is that depending on the device powering and supplying the sound... YMMV.
Shanling admitted that they couldn't and didn't test this with every possible phone out there... Nor would I expect that.
The only way to guarantee a wide range of compatibility would be if they included a battery pack, which has its own issues, not to mention it would raise the cost and size.
I agree that using an external supply is an option, but then you end up being less portable defeating the purpose of the dongle dac, and where you would probably want a DAP of some sort. Which ups the price considerably.