Fortunately I use a pair of Morganas for the HC that does the sound and a mere regular black ( what came in the HC box) snaic for the other HC that does just the 2 24v dc supplies. Works for me so far.
But I can see how you can swap them over and get no sound!
Yes - and no. The signal was (wrongly) going to the HiCap without the 4 pin DIN to XLR lead, going to my 250.
I had intended the RH HiCap to have the signal - which is how I had had it just previously (before swapping boxes around). But I got the SNAIC’s wrong, so the signal went to the LH one. I swapped the SNAIC’s back and all was snakey…
Interesting. I run both SNAICs from a SCdr to a 282 [very] loosely twisted around each other. Which is a general (not specifically Naim) recommendation for reducing noise. I’ve never had any problem whatsoever with that configuration.
Running them close together is certainly a good idea (and with the socket layout of 282 and SC this tends to happen anyway). I think the OP was talking about crossing them as in meaning getting them the wrong way around and getting no sound.