@lemonhaze There is a lot of info to be found on the Web about RCA's with a design that is not just Low Mass but Low Eddy as well.
The descriptions mainly relate to RCA's as I am believing XLR's are a inherently Low Eddy design, I might be incorrect on the XLR description.
For the record, my experience of this change of Connector, has been exclusive to a Tonearm > Phonostage > Power Amp, with SAEC SL 5000 Cable.
I was demo'd the WBT Low Eddy connectors in place against the standard supplied connectors on the Cable.
The System owner also the designer/builder of the Tonearm, had prior to my demo's given, used their long-time owned Copper KLE Harmony and come to the place where the Low Eddy type from WBT was to Supersede them in use. This became very apparent when the Chassis RCA was also to become a Low Eddy connection.
I can say the system used is one I am very familiar with and is very revealing, due to it detail resolving capabilities.
This system has on occasion introduced me to the perception of Envelope, not many systems are capable of creating this perception.
The use of Low Eddy connectors as suggested, reinforced in a discernible manner, that the perception of Envelope being manifested was seemingly tangible.
Unfortunately for the type that really does like to think their system dedicated to replaying recorded has substantial capabilities at resolving information embedded by the recording engineer, such a indelible impression made by the perception of Envelope become another plateau to be ascended to.
For myself today, when considering my next steps, Low Eddy, is the top of the list when it comes to creating an interface between Umbilical Cable and Device.