Comparison of using OPA2604, 5532, OPA2107 in AD1955Pro DAC

the OPA827 i get from TI USA so cannot be clone ha..ha, u can try acess to their website and ask for sample.... it is soic, single channel...

Anyway when i use this at my 8000A (DC servor), i feel it is a bit digital even though detail & resolution is very good.

I see, my friend and i get them last year but we are not from HK....thus we got the luck to get it....

then i must keep it as souvenier....