Do speaker cables really make a difference ?

I thought this subject was a “dead horse “ too but, oh well.

My Acoustic Research AR 3a’s were in ‘74 ordered with AR speaker cables and they turned out to be lamp cord, 50’ each I recall.

Upgraded to KHorns in ‘81 and kept the cords, believing, like Paul Klipsch, that finely made, expensive speaker cables were bull****.

My brother gave me some unwanted, not-so-high-end Monster cables and I was quite honestly floored by how incredibly better the sound quality became…...placing me firmly in the believer camp.

Post script: 

I got some anticables many years ago and they sound fine.

As previously remarked: at some point accept happiness in how your system performs.