If you Google "Jerry Ozment", you'll get his phone number. I have a review on this dac compared to the later Reference if interested.
Altis Ultima Dac - Chip set
Does anyone have a schematic for this dac. Specifically which chips are used. For some reason - the type of chip set used in my dac has purposely been scratched off. The point of the question is there any possibility of replacing the original chips with newer ones that may offer advances made in technology in the past decade.