Building new cables with these very cool Bocchino B19 connectors.
These are very easy to work with. A pass through to fed the center pin and separate cavity for the shell connections, each with their own set screws.
Solid copper - the write-up on them:
Both the center pin and body are machined from 100% pure solid C110 copper billet on a CNC lathe.
The center pin is plated with 3 microns of silver and then 3 microns of gold then fully polished and the body is plated with 3 microns of silver and then another 3 microns of silver and it too is fully polished. The silver sub-plating prevents the copper from leaching through to the outer plating. This is an extremely time consuming and expensive process and basically makes these connectors fine jewelry.
No solder - all done with stainless steel non-magnetic set screws.
The sound combines the body of copper, the color and texture of gold and the speed, detail and air of silver.