You can thank my nephew Mikie (a pseudonym) for this opportunity. Mikie walked around behind my system and stepped on these Blue Heaven Rev II bi-wire cables. Half of each cable's 4 meter length has creases in the insulation (see the photos). The cables lie flat but once the dents are in them they stay. The markings are on the part of the cables that connect to the amplifier. In my system this has not been noticeable as the cables are lying along the wall behind the equipment rack.
I am confident that the silver-plated copper conductors were not damaged, and that their performance has not been affected. I tested the cables by playing pink noise while manipulating each cable, hearing no affects. Then I turned my amp all the way up with no signal and manipulated each bend listening for scratching or any other noise. Complete silence. I've continued to use the cables with satisfaction ever since. I'm selling because I no longer need 4 meter runs.
I'm not sure you can buy even mid-range 4m full bi-wire speaker cables for less than $1,000. Mikie says you're welcome.
I'm selling several interconnects also. Take a look.