Just soldered my a few opamp on adaptors Ad797, LMH6655, LTC6241.
Previously, was using the AD825 -L/R, LME49720-Buf, LT6234 -DAC.
Didn't really have the time to A/B the opamp. But i first tried swapping the LMH6655 into the Buf, louder and clearer sound compared to the LME49720.
Next swap in the AD797 .. Much better separation, soundstage expanded and it feels like the singer is singing much closer to you.
Next LTC6241 - unfortunately i think i didn't solder properly ... the sound coming from the right side of my earphone was soft compare to the left. Have to resolder a new LTC6241.
After i decided to try the LME49720 on the DAC .... It was terrible, i felt the sound is abit compressed and muffled. Not sure whether i was affected by the LTC6241...
Will do my test later on ... when i have to time ... will try to solder the OPA627, AD8066, AD8397 and the LTC6241 again.
I think we can use one of the rooms in NUS Bukit Timah Campus, plus the fact that i have lessons there on sat ...