Hey guys. Alright I have 5.1 surround sound. I have a sony STR-K740P receiver. The Power Outputs are as followed: Front: 80W/ch Center: 80W Surr.: 80W/ch. Subwoofer: 50 watts. What I want to do is hook up 4 more speakers. I would like to hook them up either via running audio cable into the other speakers or directly from the receiver. My question is, is this safe to do? I know that each speaker has a certain power output, so if I hook up more speakers into a port where other speakers are... will I fry my amp or speakers?