A little illustration.
Many years ago I aquired an Arcam Alpha 7 Amp and CD and a pair of KEF Coda 7 speakers. I still have 'em, very nice they are too and entirely adequate in a non acoustically perfect environment IMHO.
A mate of mine turned up for a listen and having had his ears educated went off for a think. A while later I went round to his place to find 800 quids' worth of Amp, 500 sovs of CD, a pair of AR100 speakers and several metres of sodding expensive cable. A quick listen later:
"Very nice, but there's something wrong with the right-hand speaker".
"<VAPOURS> No there isn't, it's all perfect!"
One shufty round the back later:
"Got it. You've biwired 'em but left the links on the right speaker, try it now.". Some listening later: "Yup, that's got it, spot on now!"
".........!!..............I can't tell the difference......."
The most important component in a HiFi system? Decent ears.......