Wow another instance where SBAF and ASR have similar overlapping experiences,
I've got an AGD NFB 10ES2 from like 5 years ago, over the years I've been impressed with it yet I've never heard any of their newer products. Though when I was ordering my product I emailed Kingwa directly and his answers were pretty conclusive. No flowery madness or anything, I guess "vintage" AGD is going to be a thing now. Heck the NFB10ES2 reviewed decently too though I can't say there are any measurements outside of AGDs
Either way I'll be getting an ADI 2 Dac here shortly so no more AGD. Maybe I'll send my "vintage" unit for measurement...