Transparent is the worst offender. Their cables have "Networks" that are enclosures somewhere in the middle of the cables. What's in there? They ain't talking. I owned a cheaper model and the network was made of plastic. The cables were balanced so there were 2. So I broke it, but I got it open. There were shunt filters which consisted of a cheap Radio Shack capacitors in series with an equal quality resistor going from the mains into the ground lead. So in theory they could have "shunted" some HF noise, but these were $350 20 years ago. Their top of the line speaker cables, The MM Opus, has a network the size of a football and it's made of a sealed composite. Only 40 large. 40 big ones for a cables they won't even explain how it works.
Why high-end cable manufacturers don't post measurements?
I'd like to get your take on why high-end manufacturers don't post measurements? would you like to see how a cable measure before ....does it matter to you?