Have a OCM 200 power amp


Ocm 200 has a single XLR jack in the rear of this unit. Want to know what it could be use for. XLR on one end and two Rca jacks to my preamp..??? Or will this make my amp mono block?

Thanks Wayne 
wayne3720
Rated Power (unbalanced stereo): 100 Watts - 8 Ohms / 200 Watts - 4 Ohms
Rated Power (balanced mono): 400 Watts - 8 Ohms
So I can use a Y cable with a XLR on one end and two RCA on the other into the preamp.....????

Wayne