Based on the latest generation of WBT development, 0708Ag speaker terminals feature silver conductors.
www.audiophonics.fr
A few friends had great results with these.
We all agree that those Bocch spades make a difference, so I don’t want to skimp on the binding posts.
Inside my TADs I would have to solder, I guess.
Any experience with them or their copper (not galvanically but with plasma applied) gold plating?
Sorry Ulrich however I am a bit out of touch wrt the WBT models. One factor I would consider would be the size of the contact area for the spade - bigger means lower impedance.