Spent some time listening to LME47910HA, OPA637BM & OPA627SM
started off with a pair of LME47910HA in buffer, taken aback by the sound quality, then I added two more pairs in the I/V, this certainly take the quality to another level.
I read a lot about OPA627, from what I gathered, AP/BP is quite laid back, BM is not bad, SM obviously improve most area of BM. So I got myself 2pcs of OPA627SM. Having fun comparing it with LME47910HA (in buffer) for the past few days.
LME47910HA is sharper and has a slightly heavier bass line. OPA627SM is tonally softer & less aggressive, resolution is finer, instruments position is better define. No doubt musical structure presented by OPA627SM is by far more sophisticated. But depends on music & taste, I think some may prefer the livelier LME47910HA.
Too bad, I don't have the SM version of OPA637, it will more interesting if I can compare 637SM vs 627SM.