Best interconnects for Velodyne DD series

Athough frequency spektra is narrow for a sub I´m sure there
are better and worse IC:s., questions is how much.
Is silver better than copper considering reproduction of signals origin.
What about overtones (although less distinguishable than midrange), how much impact on soundstage, details etc. (not talking about placement of sub).
Anyone with experience I´d really apreciate your thoughts.

Many Thanks!