Luxman C900u owners

I honestly don't even know if this post has a question.  Assuming it does, what are you trying to do and what speakers are you trying to do it with? 

Trying to run ATC active speakers using XLR OUT AND RCA OUT to run subwoofer.  Do not seem to be able to have simultaneous signal to run both.

I responded to your first thread. This is a duplicate of that one isn’t it? If it won’t allow rca and XLR concurrently then your options are limited 
https://forum.audiogon.com/discussions/help-luxman-c900-u

Simply find that odd for a former flagship product.  This cannot be an unforeseen outcome.  Thanks.  I’ll try to contact Luxman corporate for insight.