To truly ascertain the sound of a length of wire, a bypass test would need to be performed. Sounds like a job for Peter Moncreiff! The output of a pair of mono amps, each placed directly behind one of a pair of speakers, directly into the speakers via just connectors, say banana plugs. Then solder a length of wire (say a meter) to the end of each plug, and listen for the difference between the wireless connection and the wired. That difference, if any, is the sound of the cable
Short of that, the sound of wire is a matter of comparison. Kimber uses both copper and silver wire, in some models one or the other, in others both. Silver has a reputation of being brighter than copper, some people feeling the brightness going away after burn-in. As they offer speaker cables made of all silver, all copper, and a silver/copper hybrid, Kimber must have three house sounds, assuming silver and copper sound different.
In the comparison between Kimber’s silver wires and Cardas’ copper, is the Kimber brighter than the Cardas, or is the Cardas warmer than the Kimber? See, it’s relative to each other, not to a neutral standard. Which is "correct"? Is either? That’s why in the end speaker wires are selected based upon their synergy with the speaker they are used with, as well as the entire system. To compare apples to apples, see if you can borrow sets of any Cardas, and a set of Kimber’s made of copper. Then compare Kimber’s copper to their silver.
Then buy a pair of Clear Day Double Shotgun ;-).