Gold coated brass speaker spades

Certain assumptions are being used to justify finding brass or any other material inferior without the assumptions being supported.  Is conductivity the deciding factor in what sounds good?  Is it necessarily the case that a material that that reduces conductivity or in any other aspect alters the signal necessarily bad for the sound?  So much is being made about the particular connector's, or for that matter the cable itself, physical properties under the assumption that there is a set of properties which, if optimized, will always result in superior sound.  It does not work that way because each system is different and each listener has sound preferences that may mean different alterations to the signal will either be desired or deleterious. 

Does it matter if Tara uses gold plated brass?  Yes and no.  If it alters the sound as compared to some other choice, it matters but one cannot say for the better or worse on a universal basis.  If it doesn't alter the sound in any system, then cheaper or more durable is desirable.

i don't care what material is used for the connectors in my cable (Audio Note silver wire); I care about the sound of the cable as a whole.  I looked it up because of this thread and found out that my banana terminated cables utilize silver over what I will call "mystery metal" (the description is only that it is non-magnetic material) for the connectors.

Are Furutech outlets UL-listed?

It states this under their FPX outlets, but it is not underneath the GTX outlets, so not sure.... 

SPECIFICATIONS

All non-magnetic α (Alpha) Phosphor bronze Conductor
All models c(UL) approved

Unique pin insert construction ensures increased contact areas,
stable transmission and the tightest contacts in the Audio industry and they won’t scratch or mark the plating on male AC connectors!

・Accommodates cable diameters from 10 AWG to 24 AWG.

・Dimensions: 104.2mm×33.5mm (L×W), 28.2mm thick.

・Materials: Main body: Nylon and Fiber Glass

・Cover: White polycarbonate for FPX- (R) and (G), Black for FPX - (Cu)

・Connections: Set-screw

・Non-magnetic Rhodium, 24k Gold or Non plated Phosphor Bronze conductor（t: 0.8 mm）

Yes both the Furutech GTX-D (both gold and rhodium plated) are UL rated, as is my second favorite Oyaide R-1. I own both, and just double checked them

GTX-D specs:

• Rhodium or gold-plated α (Alpha) Pure Copper Conductor (0.8mm)  • Nonmagnetic stainless conductor spring system  • Body material: Nylon/fiberglass with piezo ceramic and carbon damping material • Cover material: Polycarbonate  • Parts set with nonmagnetic 2.0mm-thick stainless brace plate • Specified for wire diameters of 4mm (set screw) • Dimensions: 104.0 mm (L) x 47.2 mm (W) x 28.0 mm (H)  • Total attention to detail and build quality extends right down to a specially designed patent-pending conductor pressure plate (see below) that increases contact area  • Furutech spade terminal FP-205 recommended for 10 AWG wire