There was a time when you could buy an upscale loudspeaker cable that would drive some amplifiers into oscillation serious enough to cause component damage. The cable designs were suspect and to a lesser extent so were the amplifiers involved. I don't think cables like that are readily available anymore. I think now you can just pick a cable that uses connectors compatible with your amplifier and go from there.
Speaker Cable Compatibility with Amplifier and Speaker
I have heard that it is most important to match speaker cables with the Amplifier being used; more so than the speaker. I plan to connect a Krell Evo 302 to a Harbeth 30.2. I would appreciate responses from anyone who is familiar with the science of selecting a compatible speaker cable for this equipment.