Discoveries about isolation of signal cable took us from ID40 to ID41. But that’s about signal, this is about a mains cable, so not flying in the face. They didn’t and haven’t changed the power cables even on SEs. So it’s either something they are oblivious to at this stage, even though it’s been talked about for many years or they’ve concluded it doesn’t give an improvement (fonal change maybe).

If it works for the individual then that may be all that counts to them but others want to know if it’s real or illusory. John Swenson explains the science, cause an effect. It makes sense and that checks out with what people hear.

Lots of discussion about DC, not so much mains cable. Balanced power supplies - that sounds interesting.