Well I guess after all those ridiculous shielded cables it was only a matter of time:

http://www.mcelhearn.com/how-hi-fi-magazines-write-about-cables-part-19-magic-rocks/

"Large Brilliant Pebbles On the floor in room corners, Large size Brilliant Pebbles reduces comb filter effects caused by very high sound pressure levels that develop in the corners when music is playing - as much as 3 or 4 times higher than the average sound pressure level in the room!!"