I got a Marantz PMD661(MK1) for the Mix-Pre-D ,
I adjust settings on 2 machines : 24b/48Khz,
I connect a cable AES/SP-dif as DigiGal style
and it works fine.
For the Mix-Pre-D power, I use the Hawk-wooks DV-SQNR to recycle my NPF-970's (Hirose connector, 12v output)
At last, I got a Petrol bag : PS607 which is very helpful to insert all things , including headphones.
Ready to use !
It remains to find an external power supply for Marantz (5V) (as Hawk-wooks style)