What do $2500 speaker cables sound like?

akg_ca and williewonka said it best.Also the most expensive cabling absolutely is not the best match for every system. The signal from the amp to the speakers never arrives unscathed.Finding one that does the least harm and allows the components to perform as designed takes trial and error.

"...Whatever happened to tone controls? That solves any problem you have..."

I haven't owned any equipment with tone controls since about 1972. Never needed to use tone controls but it doesn't mean I can't put the final tune on my system(s) by selecting the correct cable. 

@ghdprentice 
You mentioned that your cables get out of the way. In my opinion, boutique cables do not get out of the way of the music. Quite the opposite actually. They're doing something to give the listener the illusion of more this or that or less this or that.
The wire inside your amplifier and inside your speakers is NOT your boutique speaker cable. Remember that.

Just my opinion.

The whole notion of cables "getting out of the way"...or, having neutral or "no sound signature of their own" is ridiculous.

I’ve never heard my system without speaker cables or interconnects. Have you?


P.S. obviously there are wireless speakers...but this is about cable.

"...The wire inside your amplifier and inside your speakers is NOT your boutique speaker cable. Remember that..."

Sorry, you are wrong. Electronic equipment manufacturers and loudspeaker manufactures often promote the use of "boutique" cabling in their products.