What do $2500 speaker cables sound like?

One more thing--the romantic thinker side of me is impulsively pushing my decision maker to buy some Fidelium cables.   If I got out of this for $1400, AND the upgrade felt like a component upgrade, I would be happy as a clam spending that. 

Looks like I need to try these!

My cables cost $6700. When I put them to my ears, I hear nothing. 
So the answer for the $2500 cables is the same. Nothing. No sound.

Cables and interconnects can and do make a significant difference. Anyone saying different is either deaf or just doesn’t have the resources to purchase same. Period

Never thought cables would make any significant difference due to the short runs.  But with all the talk about how quality cables improved the sound, bought used Sonoran interconnects and Morrow phono cables off sellers on the Audiogon web site. Well to my pleasant surprise both made a significant difference.  The noise floor lowered and more music and subtlety emerged.  The notes are now distinct and seem to come from a deep black space.  My speakers are a 30 foot run away from my system due to room aesthetics, so super high end speaker cables are out.  But one way to go is to buy used (broken in) and see if you hear a difference.  Takes out the high price must be better because I just spent a ton of money bias from your cable audition.

They won’t sound like anything until you actually try them.  Hopefully you have access to a decent system.   Borrow some good cables.  You can find great cables for $1,000. 
And you definitely won’t learn anything from members of this forum who have already decided what they sound like, without trying.