Suspended cables

Instead of spending money on something that really is "pseudo-science",
"black magic" and the rest of bs.... and spending huge amounts to no effect... Here is something that one CAN DO. Use batteries for power with decent true sine DC/AC inverter with double the power of your amp, or better, all of the components electrical consumption. Chemical power is very stable and clean and batteries can provide huge amount of amps in very short time interval. If you buy, say 5KW inverter, that costs 400-500 USD these days, you should be able to enjoy music finally.... Total isolation from the grid. And even if you use cheap cable, you will be surprised!
And just remember... Your power supply does not start with you wall socket, regardless how much money you spent on it.... Try looking behind the wall and down the street... and then add a few hundred or thousands of miles or kilometers, it wont make that much difference, of the grid length... and try to imagine all kind of step-up and step-down transformers along the way to your wall socket...and your super, hipper expensive, super clean piece of cable... and tell me what it's worth then.
I love music and HI-FI...just as crazy like a lot of people out there...
But I prefer to spend money and brain power where it really counts and actually makes the difference...   

...And add about 5 meters of pure lead over and below the house to protect from solar radiation, neutrino, gamma rays from deep space, and of course, throw away your latest I-phone and wireless router and laptop as possible sources of RF interference... Then check the purity of the solder used inside your equipment. If not pure enough, replace with 24 carat gold. Then check the purity of all the capacitors... Maybe some of them not strictly produced to specification. Make sure they are properly insulated against vibrations, because vibrations can make liquid separate from the PURE foil and electrolyte, and therefore it can change capacity of the given capacitors in certain range of pure frequencies being reproduced.. While at it, check the purity of the wire in the speaker drivers... If the crystalline structure of the copper wire is not perfect, maybe you have too much resistance at given frequency, which may induce non-linearity in frequency response...And also, one should check magnetic properties of the speaker drivers...because they are most important part of the sound repro chain... magnets can be finicky... Their magnetic field can get out of shape for many reasons... Purity of crystalline structure of the metal used as a base for the body of the driver ... Proximity of magnetic sources... that in turn can produce non-linearity in maximum excursion range of the speaker  membrane... That would be catastrophic...Total loss of linearity in the carefully setup system... I wonder how many of you can hear that?
When all done, it should be nearly perfect.. except for neutrinos.. which can travel trough parsecs of lead.  So, alas, no perfection is possible.. It is a non-zero mathematical possibility that one of them decides to react with a perfect setup of the cables in a most critical moment and ruin the perfect sound.. 
But, keep listening to experts...There is always hope...