@mbolek Please don't take this as a challenge, it is merely a description of a perception of a Cable I use and a Comparative evaluation to a identical Cable.
On a D.U.C.C Wire Cable I own.
I have a 0.7 mtr Length with Aeco 4045 (Terrilium Copper) RCA's and a 1.2mtr length using Aeco 4055 (Silver). Connectors.
I had loaned the Cables to be used on another system on the day there was a HiFi Group Meeting and Demo's of equipment was part of the activities.
There was also the side event, where different Cables were to be hooked up to see where there was a difference to be detected.
During this meeting the D.U.C.C Silver RCA Cable was used and my thoughts wer that it was it was showing a tendency to restrict a Vocal and present with a perception there was a Nasal Sound with the Vocal. The Same Cable in a shorter length with a Copper RCA was not creating this impression, the Richness the Cable can be perceived for producing was quite evident.
I have used these cables in my own system and have not detected these differences, but have not got the system working during the time this new assessment has been in place.
Recently in the same system, I took the 1.2mtr length to be used at a Group Demo' of a SS Power Amp', my perception was that there was a similar loss of Richness, and the Cable was enabling the SS Amp to have a harder edge.
It is this experience of a Pure Silver Connector that has been instrumental in affirming I will be using a OCC Pin on my XLR Cables, 'when produced'.
I am aware of Atlas and Furutech offering this as the Pin Material.
I am hoping a PC Triple C Coil Cart' and RCA/XLR Connector is to come to the Market. These connectors will certainly be a exchange item if they materialise.
In the meantime I did make a Female connector using a Tightly Coiled PC triple C Wire, wrapped around a small sized Allen Key. It connected with a tight hold onto a OCC Lead Out Pin on a Cart'. I have not used it, as I am yet to have wand wire produced from PC Triple C.