This cable literally saved my life.
Someone broke into my house and they threatened me with a gun. When I said that I could prove that using better copper for a digital connection makes the audio sent over it sound better they didn't beleive me.
I made a deal with them to spare my life if it was true.
I hooked my Denon 3808CI with my Denon DVD player with HDMI and it sounded ok. Being an audiophile I know this is low-quality sound. I only spent 100 bucks on that 3 foot cable! Hah!
Then I hooked up the Denon AKDL1 Dedicated Link Cable and the would-be robber had to admit that I had beaten reason and logic with my $500 ethernet cable.