Audio Magic Illusion (I love them!). They are two runs of 1in diameter cables. The tubing is filled with sand / damping material. They are extremely heavy. Even if she doesn't see them, she will trip on them without moving the cable. Last, but most important, they sound heavenly.
Wife stepping on speaker wire
I'm looking for a heavy duty, thick pair of speaker wire that she can see from a great distance. I have never come across a person that has no regard where she plops down her size 8's. Any suggestions would be a god send.