That's good to know. When it arrives I'll ring it out as well as I can. If I find any bugs (as I did with the EX5) I'll simply return it.
(Note to
@SHENZHENAUDIO) The only reason I bought the SU-6 was because of the EX5 bugs (displaying incorrect sample rate and undocumented left channel auto-mute).
If they fix the EX5 bugs before my return window closes, I'm keeping the EX5 and will return the SU-6.
If they don't fix the EX5 bugs and the SU-6 is bug-free, the EX5 is going back and I'm keeping the SU-6.
Otherwise, I'm returning both and will consider other devices.