What do $2500 speaker cables sound like?

Why hasn’t somebody made a grid that shows how  s stereo system I is affected by their speaker cable? If you buy a system and it’s too bright and you want to warm it up what brand do you buy? Or do you just look at the cable that looks like the packaging is nice and warm and then take that one home and hook it up and hope that it warms up your system? Is that how it’s done? I’m trying to figure out the logic. Isit like gambling you go into A dealers place and you ask the dealer what does this cord act like? Is it like when you buy weed can you smoke a little bit of it before you take it home to make sure that it’s good weed? Seriously somebody please express the logic to me of how this works. I don’t know because I have Macintosh equipment and it has tone controls

In double blind testing, it’s amazing to watch all of these supposed differences vanish 

Sounds about the same as a $50 speaker cable. 

“what can someone expect?”

A lighter wallet. 

Just thinking aloud here but if spending more on cables is sufficient to make a buyer believe their system sounds better,  then the secret of improving our systems is revealed. Wish it were that simple. 

More seriously, invest in some samples from the Cable Co as Ghosthouse says above, and have at it.  Nothing like comparing different cables in your own rig and room to learn how much impact cabling might have for your ears. You'll save money in the long run and give yourself an education.  If so inclined, try some A/B testing with friends too, but don't confuse that with relaxed listening, unless of course your idea of relaxed listening is cable testing. To each their own.