Pathos Aurium as a Pre-amp


I have Pathos Aurium headphones amp and I'm using it in my secondary system as a pre-amp: I am feeding a pair of powered monitors frmo its XLR analog outputs.
Now I want to add a little powered sumwoofer to this setup. 
My question is: can I feed thte sub from the second set of analog outputs on Pathos? Will it drive two analog outputs at the same time?

Thank you!
Hi, just saw your thread starter searching for this amp.. I'm looking for a preamp and found a great deal on one of these.
I'm thinking the one output isnt variable? When you use it as a Pre, how are you controlling the volume?
Many thanks