Bearing in mind it is the RCA Connectors Inner Pin (+) that will be the most beneficial material to be made of Copper as part of the Connector.
With a Modern Design Concert, using the most up to date Designs for Copper Metal, there are Furutech, Zavfino and Aeco RCA Male Connectors.
For a Solid Silver (+) Pin there is Aeco, which I use at present on my most expensive Wires.
There are also Silver RCA's from Furutech, but I am not sure if these are utilising a Solid Silver (+) Pin.
Costs Vary across the above RCA Connectors, but unfortunately they are Rare and Branded Items.
Mapleshade produce their own Solid Copper RCA, I have been using these as well, with a M'shade Cable I own.
I have dismantled one RCA Connector and it is a very simplistic Design.
If uses a Outer Copper Tube/Housing with a ID to match the OD of the Female RCA.
It has a Copper (+) Pin with a OD to Match the ID of the Female RCA Centre Penetration.
The Copper (+) Pin is Mounted Centrally into a Wooden Dowel and the Dowel is of the Diameter that offers a Snug Fitting within the Outer Copper Tube/Housing.
Ensure there is a short overhang of the Centre Pin from the rear of the Dowel, to serve as Tag to connect the (+) Wire.
If a person is familiar with producing their own Cables and have an understanding of a RCA's Construction and Function, the M'shade method will be easily understood, and the cost to produce a RCA will be seen as very affordable.
With a Modern Design Concert, using the most up to date Designs for Copper Metal, there are Furutech, Zavfino and Aeco RCA Male Connectors.
For a Solid Silver (+) Pin there is Aeco, which I use at present on my most expensive Wires.
There are also Silver RCA's from Furutech, but I am not sure if these are utilising a Solid Silver (+) Pin.
Costs Vary across the above RCA Connectors, but unfortunately they are Rare and Branded Items.
Mapleshade produce their own Solid Copper RCA, I have been using these as well, with a M'shade Cable I own.
I have dismantled one RCA Connector and it is a very simplistic Design.
If uses a Outer Copper Tube/Housing with a ID to match the OD of the Female RCA.
It has a Copper (+) Pin with a OD to Match the ID of the Female RCA Centre Penetration.
The Copper (+) Pin is Mounted Centrally into a Wooden Dowel and the Dowel is of the Diameter that offers a Snug Fitting within the Outer Copper Tube/Housing.
Ensure there is a short overhang of the Centre Pin from the rear of the Dowel, to serve as Tag to connect the (+) Wire.
If a person is familiar with producing their own Cables and have an understanding of a RCA's Construction and Function, the M'shade method will be easily understood, and the cost to produce a RCA will be seen as very affordable.