What is RED copper & Eutectic Copper speaker cable connectors...??? RHODIUM...

HI guys... and maybe a few gals,

Question 1: What are RED copper connectors and EUTECTIC copper connectors such as spades and bananas for speaker cable terminations?

QUESTION 2: Rhodium seems popular but are they REALLY plated with rhodium?


I am making a set of my own custom speaker cables and am looking for connectors, either spade or banana, that look nice and sound good. (and of course at a reasonable price...)

ALL the items I see on ebay, google search, or any site for that matter are all from China, Japan, Taiwan. They all look the same. There are many that state they are either RED copper OR Eutectic copper. What is red and eutectic copper?

They all claim to be 'RHODIUM' plated which I doubt because plating a wedding ring with Rhodium can costs HUNDREDS of dollars!! Some of the Rhodium plated spades and bananas look identical to high-end manufacturers such as Cardas, Oyaide, Furutech, WBT etc....Makes me wonder if the 'high-end' companies who clearly purchase their connectors from China even test to see if they are truly plated as stated.

So, do you think they are even worth buying? I don't have much choice since virtually ALL options are coming from that part of the world.

Thanks!