Hi, I am in a tricky situation due to a small mistake I did which could cost me dearly. Wondering if anyone can throw some advise. While we were getting our home built, we pre-wired the game room with speaker wire and after closing, we installed in-wall speakers and also connected them all to Onkyo TX NR 515. After setting everything up, I just noticed that the speaker wire has a small note in a corner that its "not for in-wall speakers". As I was in hurry to get the wiring done before drywall is put, I didn't do enough research and looks like I bought 18 gauge speaker wire instead of 14 or 16 gauge. I understand we are supposed to use either CL2 or CL3 certified only speaker wire for in-wall installations and it could fail home inspection. But other than that, could this be a fire hazard? Should I return the powerful Onkyo TXNR 515 and get something simple? Is it better to get the whole wiring replaced which could be pretty expensive now that everything is finished? Speaker Wire: GE 100' 18g Speaker Wire http://www.homedepot.com/p/GE-100-18g-Speaker-Wire-Stranded-76497/202725554#.UTVfPjDigvA In-Wall Speakers: Polk Rc80i http://www.amazon.com/Polk-Audio-RC80i-In-Ceiling-Speakers/dp/B00006BMQT/ref=sr_1_1?ie=UTF8&qid=1362452862&sr=8-1&keywords=polk+rc80i Audio Receiver: Onkyo TX NR 515 http://www.us.onkyo.com/model.cfm?m=TX-NR515&class=Receiver&p=i I spoke to my builder and he suggested that as long as the receiver does have enough continuity and enough ampiage it should be ok. (I didn't gete these technical terms though ) Any input will be appreciated. If replacing the wire is way to go, I guess I will have to get some pros this time. Thank you.