Ice, welcome to Axiom. Any coaxial cable with an RCA plug on each end will work for connecting your fine EP600 to the sub output on your receiver. This would include the audio cables(typically red and white plugs)in a "composite" video set of cables.

These cables differ in the amount of shielding against hum which they have. Taking usual precautions such as not running it alongside a power cord should result in no problem. Even thicker, more heavily shielded coaxial audio cables are available for just a few dollars if needed.

-----------------------------------

Enjoy the music, not the equipment.