Unfortunately, our conventional electrical understanding doesn't allow an answer to your question. If you try raising your cables and using different materials, you will hear differences. There are multiple components to these differences. Vibrations, static, EMI, RFI etc. all detract from the realism you hear from your speakers. My best advice is to leave your ears guide you as science, given our present understanding, cannot.
I prefer ceramic isolators, with one on every wire, including those with no contact with anything except at each end. I have, however, experience the benefits of wood on top these isolators under speaker wires. I also know that raw silk pads under these speaker wires at the isolators absolutely killed the sound. Also, with the exception of the Townshend interconnects, I have always rejected ferrite rings anywhere.
I prefer ceramic isolators, with one on every wire, including those with no contact with anything except at each end. I have, however, experience the benefits of wood on top these isolators under speaker wires. I also know that raw silk pads under these speaker wires at the isolators absolutely killed the sound. Also, with the exception of the Townshend interconnects, I have always rejected ferrite rings anywhere.

