Thiel Owners

In a speaker box all the wires +and- are separate from each other and run in tubes as are the wires that run from the amp to the speaker their paths never cross. Every polarity runs mono in a tube.Tom

I remember here awhile back that some of us messed with parallel feeds, like you are describing. Seems all agreed it sounded somehow "nicer" and "more alluring". Seems that at least 2" and preferably more separation is needed to minimize capacative coupling. Such a jungle!

Purist has been making albeit expensive liquid insulated cables that certainly have their admirers for some time now.

I forgot about those cables.
Liquid of some type would absorb or limit vibration transmission but probably not limit RFI reception  like the use of micro bearings. Tom

In case anyone is interested, the folks over at TMR have listed a walnut pair of Thiel CS 3.6 for  $1,330.45 + $399 for shipping.
Condition listed as 7 out of 10.  Serial#s  3725, 3726

https://tmraudio.com/speakers/floorstanding-speakers/theil-cs3-6-floorstanding-speakers-cs-3-6-walnu...