I currently have an HTIB and I'm currently in the process of replacing it with separate speakers and a receiver. I'm planning on replacing my wires as well, I think the HTIB is currently using 22 or 24 AWG. I already replaced the fronts with 12 AWG because the wires are just laying behind the TV stand.
I have a problem with the rears though. The wires currently run around the edge of the room, under the baseboard tucked to the edge of the carpet. Since it was just 22 AWG, I didn't have any problems running it under the baseboard. There were probably a couple spots where I couldn't fit the wire under, but I'd say 90% of the run is hidden well. I need it to be hidden very well like this because I have a 1 year old and I don't want him pulling on the wire.
So I was wondering what AWG could I run that I could still run under the baseboard. I tried my 12 AWG on some spots and it is definitely way too large. The run is approximately 35-40 ft per side. By googleing I've read that a 16 AWG should still be plenty good for up to 50 ft so I'm leaning towards 16 AWG.
Also, another problem: on the one side of the wall the wire runs through a gas fire place. We very rarely use the fireplace so it's not going to be too hot that often, but since it's a gas unit it does have a pilot fire that's always turned on. Also, the fireplace has a wood moulding that seems to be mounted flush to the floor under the carpet, so I wasn't able to tuck my current 22 AWG wire under this moulding. But the 22 AWG wire is so thin that it's barely noticeable just running in front of the moulding instead of under it. Any thoughts if the fireplace would be an issue for my wires? Also any ideas on how to help hide or secure my wire that I couldn't tuck under the moulding?
Edit: I guess another option would be to use a wireless speaker kit for the rears. The rears are next to a couch, so I can easily hide the wireless kit under the couch. My Receiver is a Yamaha v673 and my rears are Pioneers BS22. I will do some research about those kits wether they are a good option or not.