DIY Speaker Cable

Though cannot see clearly, but the words sugguested that it is for active shield usage.

Actually, I don't understand your question.  

Dielectric-Bias System (DBS) is a very complicated issue, more or less will affect the sonic performance, so if you don't know, just forget about it.

Don't be confused with the grounding of cables.  DBS is not the sam e as grounding as it is another concept of shielding against interference.

Floating of cables at the amp side will force the interfeerence to go to the speaker side.  More noise!!