adamdea
You are not a sound quality evaluation device
Yes that will be interesting/ I was wonderign though whether you ahve measured the spectrum of the M-dac 1 with and without case to see what effect the existing case is having.MDAC2 has several advantages - for starters the "Digital" Digital sections are on a separated PCB - the "Analogue" PCB is very clean when compared to the original MDAC design - if we start on the presumption of conducted RF via the Audio interconnects, then Lab measurement will be the real judge
We can use the conducted RF emission spectrum of the MDAC as a baseline and see where MDAC2 is by comparison.
The MDAC uses a 84MHz Clock, while the MDAC2 56MHz so the main spurie components will be in different locations, but we can still compare energy levels.
Do you think there is any sense in having this sort of internally divided/screened layout
http://www.audio-gd.com/Pro/dac/NFB732/NFB7.321.JPG
If aluminium cases are such a bad thing, then does this make it better or worse? I suppose it might depend on the grounding.