Ok So far I am upgrading my Sony HTIB with a passive sub. I've added some Polk Audio R150's bookshelf and a Polk audio Cs1 Center Channel. I am thinking of purchasing a Polk Audio PSW10 Powered Subwoofer but I heard that this sub has the two plug outputs instead of one like most subs. I am also wondering how I am gonna plug the subwoofer to my HTIB receiver because my current passive sub uses speaker wire and clips in to the back of my receiver. Any suggestions? If it won't work I am considering purchasing a 7.1 Harman Kardon receiver refurb off Ebay. I want to purchase some 14 guage wiring for my setup but I dont know of its to thick to be plugged into the back of my receiver because they are all the pushdown style plugins. THANKS!