Here is a common conversation that revolves around cabling - especially when one gets used to a particular setup and then throws the wildcard of a new power cable into the equation. First is the message from a likely victim:
"I just wanted to let you know that I'm still trying to wrap my head around your Mongo cord. I plan on getting it out to [the next victim's name here], but its really got me torn. I love the additional openness, coherence and dynamics vs the TWL 8+ but I am wanting for a little more warmth/emotional communicativity. But now when I listen with my TWL on the uberbuss my system sounds a bit lifeless and duller. On the other hand even my wife hears the improvements with your PC, but I can't help but shake a concern I may be more intellectually stimulated then emotionally.
This thing is much better then I expected it to be... ""
Now, my reply:
"Finding the proper balance of weight, slam and smooth detail (openness) is the hardest thing to do in a sytem that is already a good one. This is the "fine tuning" (voicing) that separates excellent systems from good ones.
Have you tried it on your power amp with the TWL 8+ on the Uber? Try it everywhere in your system until you find the balance that you are looking for. Just because it is a 10ga cable does not mean that it should only be used in high current applications. I (and others) have found that it is THE cable to use on digital sources. My Tranquility SE loves Mongo - they have a thing

.
Tell me what your equipment is and I'll tell you some other places to try it and the other cables in the package.
Happy listening!"
I've said it a million times - there is no cable that is perfect for every application. Bright systems need a darker cable and darker systems need a livelier cable. It ain't rocket science... it's just time (and sometimes money!!!) consuming. Time well spent in trying everything one can is the best way to audio bliss.
Dave
EDIT - an added thought concerning cabling in general:
THIS IS VERY IMPORTANT!!! - When a cable sits unused energy states in the dielectric change and take a while to stabilize - in the case of teflon and polyethylene (my cables) this can take a week or more. When the cables are not in use run them on your computer or something to keep it working.