I have recently purchased a Polk PSW10 Sub to replace the crapy 6 inch stock sub that came along with the Pioneer HTP-071 surround sound system. My question is my receiver has no coax, LFE, or RCA inputs in it. It does however have a pre determined spot with the other speaker wire inputs for a sub. Can I just plug it into the left or right inputs on the back of the polk system? Just wanted to know how to correctly hook it up before I got the new sub so I could get on with my life.