I met Ray Kimber in 1981 when he was just getting Kimber Kable going. I worked in a high-end stereo store in Beaverton, Oregon, and Ray came to demonstrate his new speaker cable (now known as 4TC). One of his claims was his cable was almost immune to EMI and RFI. He stated that a given length of typical 14 ga. standard speaker cable acted as an antenna, absorbing electrical energy from the air. He said this added coloration to the sound by feeding back into the amplifier, as well as into the speaker crossover circuits.
To demonstrate his cable's resistence to the "antenna effect", he used an oscilliscope. He connected a six foot length of 14 ga. speaker cable to the scope. The zero gain reference straight line on the scope shot up to over an inch above and below the reference line with electrical energy. Next, he connected a six foot length of the Kimber 4TC cable to the scope. The reference line began to show only about one eighth of an inch of electrical energy above and below the reference zero gain point. Impressive. Ray explained that the manner in which the eight seperate, individually insulated conductors were woven back and forth over each other, similar to a chinese finger puzzle, created a constant crossing of the conductors, which nulled the cables sensitivity to electrical energy in the air.
We also listened to the Kimber Kable in an A/B test with the 14 ga. standard speaker cable. I didn't think I would, but I could hear a difference. The bottom end seemed tighter, and the top end cleaner, more crisp.
I bought 20 feet from Ray before he left. It was $1.00 a foot at the time, and I thought damned expensive for speaker cable, but I was a believer. I've been using Kimber speaker cables ever since. I have two systems wired with Kimber 8TC right now (hate to say what I paid for that). One system has the cables in equal length of 35 feet each, both going into the attic space, across AC lines up there, and down again inside the walls to where they come out and connect to the speakers. They pick up zero noise. They are dead silent. They sound wonderful.
I know that's not an interconnect story, but it still deals with the subject of wire and its impact on sound. That's my story, and I'm sticking to it.