Good discussion from an audio engineer (electrical engineer) on some reasons why cables can sound different. The discussion starts around 55 minutes in. There are actual reasons why cables do sound different. Many "objectivists" just don't know enough of the science about cable construction to know why.
http://https//www.thehifipodcast.net/episodes/episode-54-shielding-grounding-draining-isolation
http://https//www.thehifipodcast.net/episodes/episode-54-shielding-grounding-draining-isolation