I worked with a guy who was crazy rich and wanted to build a great stereo. He went to a super high-end stereo shop and persuaded them to lend him a bunch of different speaker cables to "try out in his apartment". He was a phd engineer though, so rather than just listening to them he decided to do an experiment. He got some thick pure copper wire as a reference (got it from a hardware store because it's used to wire up domestic ovens and that kind of thing) and took his oscilloscope and measured the frequency response across all the cables. He found (as he expected) that the pure copper cable gave the best response so that's what he used to wire up his speakers. He did measure the acoustics in the room and put his speakers on metal pins on concrete blocks[1] to minimize mechanical interface between the speakers and the floor so the floor wouldn't clamp the bottom of the speakers.
His stereo sounded great and he was super smug about it, including taking the super expensive audiophile cables back and telling the shop they weren't as good as plain thick copper wire.
His stereo sounded great and he was super smug about it, including taking the super expensive audiophile cables back and telling the shop they weren't as good as plain thick copper wire.
[1] This kind of thing https://images.homedepot-static.com/productImages/97a91edb-a...