APL NWO2.5 ?

No problem Brainwater. You offered your perspective and I offered mine.
Your explanation of which AKM DAC revision I had certainly goes a long
way to explain the difference I perceived betweeen the Crystal and AKM
DACs.

Kumbaya.

When evaluating used APL Denon 3910 players, how does one determine
which AKM DAC revision is installed? And, how does one compare the
value of a used APL Denon 3910 with AKM DAC revision #6 versus, say,
a used APL Denon 3910 with AKM DAC revision #13?

"14" Revisions in one player means either the modder does not know his "craft", or, there is some long-green for the pickens..... 8^(

I believe the revisions #2-#14 are on the AKM DACs from the AKM
factory. They are not APL modification revisions. Whether the AKM
revisions were made at the request of APL for use in the APL products I
do not know. Perhaps APL will comment.

Every APL DAC board has the version printed on it. The designer can read the revision . Bottom line is that version 14 is the best so far and it does not cost arm and leg to upgrade any Denon version to the latest. This version 14 is the final AK4396 DAC PCB. There will not be any further upgrades using this particular DAC chip. Eventual future upgrades will be acomplished using a different DAC chip for which different hardware and software will be designed. We can not determine the used value of any Denon version. The value is being determined by the actual market and the demand.

Tavd, Thanks for the heads-up...