Stainless Steel Binding posts on speakers?

Well there are certainly dissimilar metals involved here in that the posts are SS, the rear anchor nut is galvanized steel and the spade connectors on my cables are Rhodium plate over copper. And these posts are quite substantial, they are .710" at their widest with a 2.5" ( actually the metric equivalent) overall length and a 5/16" threaded shaft. Big chunks of metal! They are beautiful, but would not have been my choice for a high end speaker.

Good- a different metal for the nut prevents galling of the threads.

Interesting comparison chart showing how far down the ladder SS is conductivity-wise compared to the other more commonly used materials in High End Speaker binding posts.

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Well that nails it down.