I don't know which version of the D-03 I have but since it came out in late 2006/early 2007, I think it is the one with higher voltages on the XLR outputs.
Regardless of anything else, as with all Esoteric gear I've owned, the XLR path sounds the best with absolute certainty. Furthermore, dual AES is definitely the way to go versus RCA, digital link or single XLR.
I had my D-03 set to 0db for its output modification level BUT per Mark Gurvey's advice, set my C-03 preamp to +12db which he told me the guys in Japan had found was an optimal setting. This combination worked very well for me and I've still got the C-03 configured this way with my D-02 with great results...
Regardless of anything else, as with all Esoteric gear I've owned, the XLR path sounds the best with absolute certainty. Furthermore, dual AES is definitely the way to go versus RCA, digital link or single XLR.
I had my D-03 set to 0db for its output modification level BUT per Mark Gurvey's advice, set my C-03 preamp to +12db which he told me the guys in Japan had found was an optimal setting. This combination worked very well for me and I've still got the C-03 configured this way with my D-02 with great results...