Some actually make their own cables out of RG5 or RG6 coax, through some RCA connectors on each end and your done.
I'm one of those guys. About 30' of RG6 running from the equipment closet to the back of the room with RCA connectors screwed on both ends.
I do also have some BlueJeans sub cables for the front of the room. These are more expensive and do not add anything performance-wise, but they are extremely flexible and helped me get around some tight corners/walls that the RG6 couldn't accommodate.
If you don't have any special requirements like that, almost any cable you buy will perform exactly the same with your sub.
Jason
