Bonjour shep
I use the same wires, OCC copper single 12ga strands. Over here it's called Anticables, but I think it all comes from a plant in Japan where I think the whole single crystal copper thingie started. Basically super efficient transformer and motor windings wire. Great for audio.
Here's what my seller says about twisting, go to the bottom.
http://www.anticables.com/technical.htmlI run mine without twisting, but never tried it the other way. I switch and swap them around so much, I think they are easier to handle not twisted. The capacitance and inductance are both about as low as any round copper conductor can go, so slight improvement by twisting might not be evident. I don't know the electrical math to tell you where the frequency would start to be affected.
It costs $10 a foot/pair over here with copper spades. How much over there?
I like it for the money. People keep telling me I need garden hose, I say show me... Of course I said that about power cords too until I heard the black sands silver, oolala!
I have the OCC ICs too. They are really weird but sound excellent, but not as cheap as the speaker wire. I think the Grovers are better though, for about the same price.
Rich