What does so many twist per inch mean, etc.?
The conductors in a speaker cable are twisted to help the cable maintain a round shape. This makes the cable easier to pull through wall studs and floor joists. Also, twisted wire pairs will naturally cancel out EMI/RFI noise that can find its way onto the conductors through a process called induction. This is not as important to speaker signals as it is to line level signals as discussed above, but it will help maintain the quality of your audio signals. The more twists per inch, the better the noise rejection.
