Forgive me guys, for I have sinned.
These are rigid heavy beasts. Looks like these are converted from car towing cables. Good thing is they stay as they like, no need and no chance to arrange them as you think you would like. Did I tell you these are heavy rigid absolutely inconvenient cables?
Do they make a difference? Absolutely positively maybe
Their role is primarily to show people you are a badass audiophile, you don't mess around, you go straight to the top (price).
Now seriously, I tested them A/B, QED Silver Spiral vs QED 79, based on Yamaha RN803D 2 speaker outputs + Australe with 2 pairs of sockets (for biwire, biamp). 1st time, with the Silver Spiral plugged down to the low frequency speaker socket, second time I reversed everything both in the amp + speakers. So 1st time I can say I perceived a plus for the Silver (details bla bla), second time not really, kinda like 75% no difference and 25% small difference in favour of Silver. So I am thinking maybe what matters mostly is what up/ down sockets you plug at the speakers and not so much what cable you have.
Anyway, Silver Spiral Rigid Snake is here to stay. It is a small price I pay for my sanity (2x3m, 280 euros), each time I will doubt my Audiophile Way or my stereo sound, I will hold tight the Silvery Snake Rigid Cable as an insurance for my music/life/meaning on Earth...
Did I tell how f... ing rigid they are?!