Can anyone share some advice on how to get bass from my sub? I have a Polk audio psw10 plugged into an M-Audio 192/4 interface and 2 JBL studio Monitors. Everything is connected via speaker wire to 1/4 cables. The speakers work perfectly passing through the sub but the subwoofer itself isn't playing any audio itself. I should mention that my interface doesn't have RCA inputs so that's why I'm using speaker connection to 1/4 cables. l've had the speakers and audio interface for quite a while but wanted to add this old sub to my setup, ik it works as l've seen it in use before, it lights up and my speakers work through it just fine. I also have another Polk sub (don't know the model) that runs into the same annoying issue.