Well, your nomenclature has me a bit confused, I have a DTI v2.0 and a DDE v1.2 but I'm not aware of a DDI v#.# produced by Audio Alchemy. With that said...
My DTI uses an Audio Alchemy PS4 which is really an EDS model number 7900 with a primary of 120v 60Hz 20w and secondary 1 is +-18vdc@250mA and secondary 2 is +-8vdc@250mA
My DDE uses an Audio Alchemy PS5 which is really an EDS model number 9677 with a primary of 120v 60Hz 15w and the secondary is +-14vdc@400mA
Hope this helps

P.S. Dusty Vawter, of Channel Islands Audio, used to repair this stuff, and he may be able to provide more information.