2 years ago I bought a 500 watt reciver and hooked up 5 speakers for a nice DTS + DD system. Anyway I finally have come across some extra money and want to buy a subwoofer. is it even possible to hook a sub upto my system cause I dont see a place to conect it? I have like a 6 RCA imputs labeld for 5 speakers and a subwoofer but doesent a sub connect threw copper wire like my speakers? sorry for my ignorance but its been too long since I looked into this stuff and have forgoten everything.