Hello, Another subwoofer question... I have a subwoofer that is just sitting around right now. Polk Audio PSW10. Is there any way I can connect PC speakers directly to a subwoofer or do I need a receiver? http://www.polkaudio.com/products/psw10 Looking at the back of the SW, I see speaker OUT. I figured I could connect a left/right speaker to use for a computer or something small. Any ideas?