The Scorche cable had very wimpy insulation many bends and "kinked" areas. Though there didn't seem to be any noticeable knicks in the insulation or wiring.
What was interesting though, was that the insulation was "clear", allowing me to see the actual wires inside. It was basically a thin (possibly 20 awg) insulated wire with a noninsulated wire wrapped around. No mesh shielding here..lol
I eventually chopped up the Scorche cable and noticed the individually insulated wire looked to be a basic steel or iron wire, while the outer wire was copper-like. It's as if they used leftover thermocouple wire and put RCA ends on it. One tiny knick in the inner wire's insulation and you'd have a type J thermocouple between your receiver and subwoofer. Stupid..
Anyways, I completely agree that subwoofer cables are extremely simple objects. I have built my own subwoofer cables, with individually insulated copper wiring and RCA ends. Never had any humming issues with these cables, similar to the Mediabridge, when used in the same situation the Scorche was used in.
The Scorche cable was just poorly built and failed because of this.