I say this is snake oil. $2K to get all the electrons in the cable to go through the very center of the conductive path instead of spread equally through the conductor?
To each his own though. When I was making silver mic cables people said they were way overpriced. I still use silver coated copper mil spec cables for most things but if you use good quality, shielded, balanced cables at just about any price you should be good to go. I still use el cheapo Hosa stereo 1/4 inch balanced cables in my playback system. Sounds pretty good to me.