Let me Chime in if I may...
I myself was convinced briefly that NOS was the best, until I tested/compared in a completely Level-Matched Scenario.
I had to refer to the Manual, and ensure that my comparison was valid. This was an Eye-Opener.
Refer to this comment:
Wouldn''t it be nice to TRULY Hear the difference between NOS, and SD Sharp?
With my newfound ability to maneuver through "Set Ups" on the ADI-2 DAC like a Pro, I've discovered that in order to make VALID comparisons between Set-Ups, there is one essential condition that must be satisfied in order for the comparison to have any Scientific Validity. LEVEL!!
When Storing a Set Up, the ADI-2 Stores the ENTIRE STATE of the Unit. Including your current Volume Setting. This Value MUST remain Constant for all your Set Ups. Also, at Playback, your Vol. Level must agree with this stored Value, else there will be Level Change when Switching between Set Ups.
Even a Second of Re-adjusting Volume to Compensate completely invalidates the Comparison. The Louder Set Up will invariably be your preference.
Do this, and when Comparing DAC Filters, etc...The difference in Filters, etc is ALL you hear...not a confusing Level Change.
Vintage 2018 ADI-2 DAC. "Classic Edition"
Cables: Red Ones, and White Ones.
Speakers: Yes (2)