I have tried, but cables seem to be the least easily discernible items to listen for in an audio system. Speakers are easy, but if you want to truly hear cables (any chance in hell of hearing differences without knowing exactly which cable you you changed to?) then you'd better have absolute superb speakers and amplification, IMHO.
Amplification changes, if done correctly, can be heard over time, or if you are lucky, almost immediately. Digital stuff gets tougher for me but can be heard. I guess I've not gotten into a huge enough upgrades to feel expensive wire is truly necessary beyond buying quality cabling, but not into the thousands of dollars and more.
I do hear folks point to wiring inside an electronic device in the audio chain and feel like nothing beyond that is necessary. That is more than laughable (at least to me). Do they want a tiny board trace wire/connection al the way to the loudspeaker. I submit large better wires count for the current/voltage put out by a power amp to the speakers. I could be wrong but I'm into decent cabling, even if not tossing tons of money into wire I can't hear compare to some acoustic room treatment. :-)