Would a "better" jumper cable equate to better sound?
Greh
Possibly. It depends on the resolving powers of your equipment, and how carefully you listen. This question is very similar to the power cord question. If the electric company runs power in cables hundreds of miles, how can a 5 foot cord affect the sound? I and many others believe it does. However, YMMV, so only you can determine if it does for you.
FWIW, I heard a nice improvement when I changed my stock jumpers out for AQ Kilimanjaro jumpers.
John