Belkin PureAV Speaker Wire


I just picked up 30' spool of Belkin PureAV speaker cable. I stripped the outer sleeve, and then each of the two inner sleeves, revealing the copper wires. However, in the center is a larger copper wire that is also covered by a sleeve.

Do I need to strip the sleeve around the single center wire?

Thanks,
tim_j_thomas
Here's a picture of the cable:

http://www.audiocircle.com/gallery/thumbnails.php?album=2650