In my fairly extensive wire and cable trials over the past few years, I found considerably more sonic variation between bi-wired cable and mono-wired cable. Since Thiel speakers were thoroughly engineered for single wire, that form represents the target performance. I can't replicate the claimed improvements for bi-wiring.
I recognize that wire/cable is used to alter performance towards personal preferences, which is the owners' prerogative. I am keeping Jim's designs intact and looking for ways to improve performance while honoring the original intents and methods. Single speaker cable is among those design decisions.