.. Let me offer a different perspective: Most people assume that when they hear a difference from the new, typically madly expensive cable... it must be an improvement! The expectation of something better, can wire the brain into some serious placebo territory that I think it is important to be aware of. A difference does not necessarily equal "better".
IMO, all good things start with the room, meaning that spending equivalent money on acoustics (or buttering up that partner for better speaker placement and the like) is more likely to really improve sound in a big way 😁
Would you spend money on cables in a room like this?: