UL CL-2-rated certified cables is the safe way.
thanks well ive already bought the 14gauge wire and ran all but one already, ive got one more, then i thought about it. i ran it straight to the celing and over the insulation. i know the best thing is to buy the in wall and take the loss but i dont wont to get back up their anymore. i hate breating that crap. if its ok for like a few months ill pay somebody to swap it out later.
Just don't tell anyone.
Of course, the proper course is to use UL CL-2-rated in wall speaker cables of 14awg or better yet 12awg. It is just more safe with their double external insulation.
Or buy some plastic tubing to envelopp your existing 14awg speaker cables.
Anyway, you should not have any problem, but if your house burn down, at least you'll know why.
Bob
P.S. Don't be afraid to return to your attic, just wear a mechanic suit with a swimming head cap, and swimming goggles, plus swimming nose clamp, and a surgeon face mask.

Oh, and surgeon gloves too with cowboy boots.
You should look the perfect fit for the job, like a pro.