I just started to build my home audio system and bought an infinity hTS-10 5.1 speaker system plus SONY RECEIVER MODEL STR DE545. The rear speaker wire outputs from my receiver are bad. Sometimes they have sound sometimes not. Any idea how to fix them? If not, can I use RCA outputs from the receiver and transform to speaker wires to my speakers? Also, I'm looking for wires with best value/low cost, cables for this system. I'll need 5 wires for speaker and 1 wire for my sub woofer. i did some research and found some speaker wires at home depot cost around $9 18g $18 16g both 50'. My questions is does it really make a difference between 16 and 18 gauge? Also, I see there's an option to connect the rear satellite from the sub woofer. what's different than connecting the rear satellite from the receiver? Thanks!