Here is an excellent example of the type of coaxial cable that you can use:
http://www.monoprice.com/products/pr...seq=1&format=2
Edit: This type of cable is used for the following applications:
http://www.monoprice.com/products/pr...seq=1&format=2

Edit: This type of cable is used for the following applications:
- S/PDIF
- Digital Coax
- Subwoofer
- Composite Video