Hi all, thanks for all your advice.
I've decided to go with speaker wire for behind the walls as you have suggested. You're right, it is probably definitely sturdy enough for being in a wall, and no, I don't think I have any mice in there
However, for the subwoofer, I have decided to go with a wall plate that has female RCA on the front and female "F" cable (cableTV coax) on the back. This is just because of 2 reasons:
- It's cheaper to run a long length of coax than shielded RCA cable
- I don't want the RCA cable to slip off the back. F cable has a nice screw-on feature, and speaker cable (as one of you have mentioned above) is sturdy also because it can be screwed down tightly, so I don't need to worry about the speaker cable, just the subwoofer cable.
Thanks for all your help