Wander over to the cable section of audio asylum or maybe do a search here. I think the JPS digital cable improves the sound on my system, however, the trick to it seems to be just an rc network molded into the plug. The good news is that it can be had from the original manufacturer for something like $30.00. (No, I don't have the manufacturers contact info, but it should be easy to find on AA or maybe somebody else here has it).
