finally the AD797BRZ arrived here (all following is under the „premise“ that i´ve got original (or near to) ones and not cheap „crap“)->absolutely more „dark sound“, absolutely more push in the lows/middle-lows..
(as presumed->“the BRZ were the ANZ with all the advantages of an OPA627AU..“,“its like going from digital to vinyl“..)..
absolutely okay, high THD+N, very „exactly“ , very good Op-Amp, but for me absolutely too dark, not soo much presence (at all and in the middle-highs/highs..)..
(but also said: i have got not the time (and fun) at present to get more in-depth with the BRZs)
after replacing them with the ANZs:->thats for me the right direction..
get so a better idea of the „true/right“ sound..(for me)
(i really miss the „brilliance“ of the AD797ANZ (in any case from the ones i have here)(although, as said, i also miss the „push“ in the low/middle-lows))..
but all this depends very much on your other „gear“, speaker, amplifier, room-size, listen-preferences and so on..
i will stuck here with the AD797ANZ for now (on the „blue“ ES9038Q2M)(all according to, as said, that i´ve got the original (or near to) OP-Amps..; i would prefer them over the NE5532,LME47920,OPA2134,LME47910,Muses8920,OPA627AU->(in this order)(see this post in the forum->LINK)
but again: it really depends on your personal listen-affections and so on..
in optimizing the ES9038Q2M the next steps will be (without some hw-modding;its too complicated for me at present): connect a -+15V toroidal transformer, buy some (as last op-amp-step) Burson V5/6 and maybe use an AK4137 (see earlier posts)..
and („quelle surprise“): buy finally some new speaker+amplifier 😉
but many greets for now (+ more to come)!! 😉