Trouble with my aiyima a07 pro with the sub out on my Yamaha receiver.

Hello, I'm new to the Forum so if I'm asking a question that is already been covered, please excuse me.
So, I've been trying to connect my Yamaha receivers sub out to my ao7 Pro to power my subwoofer so that I can take advantage of the Yamahas crossover, and I cannot get it to work. Does anyone know if the ao7 pro is capable of receiving the sub out signal from the Yamaha through its RCA input?