The most impressive array of cables that I have seen and heard personally ( that comparison is a highly subjective one) was an all-NORDOST ODIN cable array on a $500,000 2-channel ultra high-end system (source, preamp, power amps and speakers )
Ka-Ching, ka-Ching....but WTF, it follows in tandem with what’s in front of it. The cables are the final link in setting up a system synergy overall that transmits the good, the bad, and the ugly produced in front of them. Garbage in, garbage out. It’s the electronics that serve to create some approximation of a slack-jawed audio experience, not the cables .
Cables can either perform well and certainly augment an audio system to attain peak performance, but they will never be the genesis by themselves of an "A-ha" moment. Poor cable selection generally can take away from peak performance, they don’t invoke a walk down the yellow brick road to The Emerald City in OZ .
i auditioned many cables for MY system (emphasis added ) and settled on an all- NORDOST FREY cable array (all of speaker, IC and power) as MY preferred choice AT THEIR PRICEPOINT (emphasis added again...) using the 10% of the system ex-cables guidelines .
Takeaway:
Even though I reside in the "pro-cables ... yes, they do make a difference" camp in the senseless, boring, and pedantic anecdotal cable wars perpetrated by the forum trolls, , even I will agree that at a $500 pricepoint, the audio performance differences between Brand X versus Brand Y in speaker cables is minimal to nil if they are mass-marketed built with a generic run-of-the mill (cheap?) parts and assembly quality standard. The build quality of the cable connectors on a particular cable (e,g quality built all-Cu WBTs or the like) versus the cheap-as-you-make-them crap quality made-in-China plated Brass alloy ones, have an overall larger effect than the actual cable itself .
Particularly at that pricepoint, many brands simply don’t make their own cables but just order up mass-produced cheap kit from 3rd party suppliers. That’s where much of the snake oil acrimony in cables discussion starts.
In my experiences, the informal and anecdotal "10% of your gear suggested $$ outlay" price-point for cables will get you towards the system’s peak performance available strata .... that’s about as good as you can hope for.
At a suggested $500 price-point strata, the audio performance differences in choosing one cable over another is system dependent for sure, but the degree(s) of improvement are marginal to incremental at best and not any epic "jaw-dropping" step-up.