They use the same connectors as Audez'e.
I think the stock cables for the Abyss are actually really nice. The material used for their jackets reminds me of what Etymotic uses on the ER4S somewhat, and I find it's just the right balance between flexibility and rigidity; they don't tangle up or catch on clothes, but they're not rigid and awkward to move around with either.
JPS does offer more expensive cables for the Abyss. I recall they were promoting them at several meets in Asia. I think the price was like $8k or even $10k for these cables.