Sound differences between Copper and Aluminum Bus Bar Electrical Panels

If I had to guess, I'd guess they went to aluminum when the price of copper went through the roof. IIRC, copper (price) is back down again, so they may have gone back to using copper.

I'm surprised they managed to get approval for an aluminum bus bar, all things considered:

Even though copper has a long history as the material of choice for conducting electricity, aluminum has certain advantages that make it attractive for specific applications.

Aluminum has 61 percent of the conductivity of copper, but has only 30 percent of the weight of copper. That means that a bare wire of aluminum weighs half as much as a bare wire of copper that has the same electrical resistance. Aluminum is generally more inexpensive when compared to copper conductors.

Aluminum conductors consist of different alloys known as the AA-1350 series and AA-8000 series. AA-1350 has a minimum aluminum content of 99.5 percent. In the 1960s and 1970s, due to the high price of copper relative to aluminum, this grade of aluminum began to be popularly used for household wiring. Due to low-quality workmanship at connections and the physical differences between aluminum and copper, high-resistance connections formed and became a fire hazard.

As a response, aluminum alloys were developed to have creep and elongation properties more similar to copper. These AA-8000 series alloys are the only solid or stranded aluminum conductors permitted to be used according to Article 310 of the 2014 National Electric Code*. AA-8000 series alloys meet the requirements of ASTM B800, Standard Specification for 8000 Series Aluminum Alloy Wire for Electrical Purposes–Annealed and Intermediate Tempers.

https://www.anixter.com/en_ca/resources/literature/wire-wisdom/copper-vs-aluminum-conductors.html

But what do I know,  I've not paid much attention to this area of panel tech, other than noting that copper is the way to go - the end.

The real audiophile question is should we use Copper or Silver? :)

Silver would be my preference.  Maybe we as audiophiles should approach a manufacturer and see what it would take.

Time to go long on silver. : )

Where exactly does this end, and what exactly are you training your neural paths to do for you? 

I mean, if this is all that, you need to go fully off grid, and design some audiophile grade inverters. Maybe just go full battery powered listening room. But come on!

Even if you could hear differences, and the ear/brain might, this is something you are training your ear to do for you. You are choosing to attempt to listen to things no one else can. Is that really your goal? 

I used to be a projectionist and I learned to listen and view each frame critically for noise and dust and scratches, making it very difficult to watch a movie anymore. Don't do that. 

Best,

E