Why Rhodium?

On top of that, you guys are kidding yourselves if you believe that the material used for the connector plating will have an enough effect on a signal to be audible, if even measurable.

yes this is why, for example if you compare the Oyaide 037, 046, 079 plugs which have the same exact construction except the plating, being silver/rhodium, gold/palladium, and gold/gold respectively, and you put them on the exact same built cord they sound exactly the same! The different color ends are only for WAF and for the fashion conscious audiophile so as they don't clash with the rest of their system.

I still seriously doubt that anyone can hear the difference between any type of connector plating

Does this indicate that you have not tried plugs with different platings? If you have which ones? If not then you have no first hand experience, it's all just speculation. Not really helpful to the OP.

Rhodium is a good conductor of electricity but not as good as copper, gold or silver. As Mofi stated it resists oxidation well. It is more durable then the above metals and gives a very smooth finish which is one of the keys to its use.

My experience with rhodium plated plugs is that there is a glare to them BUT I have not tried all the rhodium plated plugs out there (notably not the FI-28M and not the one Paul uses).

Also it is very important to realize that the wire in between the plugs drastically affects the sound as a whole. A plug that results in a great sound on one cord can sound like poop (technical term) on another.

Br, listening to a system configured with various types of cables/connectors and making up cables and changing only one variable like the plug, or solder used, or connector used are two different things. Most people are shooting for a balanced presentation and there are many ways to get there so hearing different systems with different cables and having people getting somewhat similar result’s is not terribly surprising. But I know I could easily throw it off inserting one or two well chosen pc’s that would exacerbate a systems flaw.

With a few companies the only difference between the certain plug models is the plating, all else being equal so then you are only hearing or not hearing the differences afforded by the plating.

Just for shits and giggles I would try building a pc and changing only the plugs preferably only the plating, try it on your cdp and I am sure you will hear a difference.

I do agree though crimping is the way to go.