Originally Posted by cshepard
You asked for opinions; you are getting them. Please don't use Romex for speaker wire. There's a reason they make a product called--get this--speaker wire! Use the right tool for the job. Surely no one would get confused down the road & do something dangerous with the Romex. But you want to hook up speakers, so use speaker wire.
I've seen idiot electricians & idiot DIY'ers (one not need look far around here). Use the correct material.
I wouldn't use it either for the mechanical reasons I already indicated. It's too stiff. But from an electrical viewpoint there is nothing wrong with Romex for speaker wire. It's electrical ratings are above the requirements for class 2wiring.
I got news for you. In many movie theaters speaker wires are ordinary THHN electrical wire in conduit. It's allowed to be exposed for a foot at the speaker and inside the amp rack.
Like a I said before, the only inspection issue could be a very code savy inspector citing the "intended use" clause. And I don't even know if that applies to this application.
And if I ever wire my outdoor areas for sound, I am going to use 18ga sprinkler wire! It's UV resistant, low cost, and perfectly acceptable as speaker wire.