Propagation speed????? You must be joking. This is not a common-clock digital system. This is analog audio for kripes sake! Series inductance is the most important parameter, followed by capacitance and dielectric absorption.
If you need a low-inductance, low capacitance cable, Which you do, this is a hard combo to come by. Most manufacturers dont even publish their numbers because they are so abbysmal. Here are the numbers on my cable for comparison (I consider this low inductance, moderate capacitance) I have quite a few customers with electrostatics - single-wired too:
At 10 kHz: L = .033 UH/foot, C = 118 pF/foot.
Nordost Valhalla comes close to this - measurements were published in Stereophile.
If you need a low-inductance, low capacitance cable, Which you do, this is a hard combo to come by. Most manufacturers dont even publish their numbers because they are so abbysmal. Here are the numbers on my cable for comparison (I consider this low inductance, moderate capacitance) I have quite a few customers with electrostatics - single-wired too:
At 10 kHz: L = .033 UH/foot, C = 118 pF/foot.
Nordost Valhalla comes close to this - measurements were published in Stereophile.