Hello John ... 

 you need to know is that the XLR on stratos, are not symmetric ... 

 it is a bypass of the entries!
 that can switch on XLR Liasons.
 let me, I tried it with a Harman Kardon Signature 1.0 preamp, in France, I say, and I had got a very big BUZZZZZZ !!!!!!!!!!!!!!! !!!!!!!!!!!!!!! 
 
 
 So have the opposition in XLR, RCA and the rest Surles, I do not know what it can give ??????? 

 knowing that the two are connected !!!!!!!!!!
 our friends will certainly clarify  
