Do I use aes or spdif on my ad2k+ > xlr > 702 ?
I'd go AES. But either will work.
Same here just because its a locking xlr connector, even though they do make locking RCA's as well! I still prefer AES though! YMMV! The difference in resistance[75ohm for SPDIF and 110ohm for AES] doesn't matter at all IMO either!
I cant believe its been since like 2007-ish since I ran a digital input deck[481/3>v3>722]! I used to run 481/3>v3>digital>jb3[2004-2005]/722[2006-2008] back in the day, and that's the last time I ran a digital signal! Crazy its been that long! But it's def nice being able to send 2 channels through one cable like possible with SPDIF/AES