Transparent Opus for those who can afford. I had an opportunity to listen to these speaker cables through a pair of approximately $4,000 Respons speakers at Transparent about two years-ago. With non-networked cables, the Respons speakers sounded like good $4k speakers. Adding cables that cost about eight times the speaker cost transformed the speakers into another relm. This demo was clearly designed to demonstrate what is possible, rather than a likely combination of components. And, BTW, I believe Fabio uses Transparent Cable in his system.