Can i connect two Systems to my PSW 10 Sub?

Hello, i have one PSW 10 Sub around eight years ago, i am driving it with a Sony ES Multichannel Receiver through a mono RCA Audioquest subwoofer cable but i want to connect a Technics Micro System through speakers High Level out to High Input Levels input of my sub because i want more bass for the little system.

Any Issue with that?

Thanks!