There are many cables that cost tens of thousands of dollars out there. The manufacturers talk about quantum properties of single-crystal copper and other mystifying ideas. It’s almost all poppycock (that’s a technical term, really!)
Cables serve important roles in audio reproduction systems, from passing digital data from streamers to DACs, to carrying higher voltage and current audio signals to speakers, and of course delivering household (mains) current to the devices. And it’s true that broken, poorly-manufactured and out-of-spec cables can cause problems with all of these interconnection scenarios. But the idea that extremely expensive special cables are needed for near perfect sound quality is simply a myth.
