Mmakshak:
Having had both the Crystal DACs and the AKM DAC's - (probably about revision 7 on the "Rainwater scale"), my experience has been that after they break in, the AKM's are significantly, noticeably better on well-recorded music. More detail, slightly greater range and a more pleasing presentation. As far as poorly-recorded music, "garbage-in" is still going to result in "garbage-out" IMHO, no matter what player you use. The AKMs are just more revealing and I am definitely glad I did the upgrade.
Having had both the Crystal DACs and the AKM DAC's - (probably about revision 7 on the "Rainwater scale"), my experience has been that after they break in, the AKM's are significantly, noticeably better on well-recorded music. More detail, slightly greater range and a more pleasing presentation. As far as poorly-recorded music, "garbage-in" is still going to result in "garbage-out" IMHO, no matter what player you use. The AKMs are just more revealing and I am definitely glad I did the upgrade.