Sound differences between Copper and Aluminum Bus Bar Electrical Panels

David, I'm referring to the electrical panel bus bar.  In my Square D Homeline electrical panel, both the bus bar and grounding bus bar(s) are aluminum.  I have ask a few manufactures and I get a somewhat mixed response.  One says it's huge and the other manufacture says it's a slight improvement.  I am asking the question because I was quoted $1850 for this and I estimate there is $600 in material.  I'd rather evaluate the inputs before I take the plunge.

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

It's a basic question.  Yes there are probably better ways to improve your system.  I'm interest if anybody went this far to do it and what the results was. The Audio Bacon guys did this but haven't responded to this question on their website in one of the review responses. 

Since posting this, I have seen that the incoming utility power line is heavy aluminium and the conduit from the meter to my electrical box is heavy aluminum so I think it's not worth pursuing even if I do it myself.

David, Check the TC thread.  I made the last post.  

"The neutral bar as well as the ground bar in the Square D QO panel and Homeline panel are made from an aluminum alloy, not plated copper".

My search on the internet shows the Square D QO panel as having a copper bus bar.

I'm coming to the conclusion that if the incoming utility power lines to the meter is aluminum and the main power lines from the meter outside to the panel is aluminum, then changing the panel from an aluminum bus bar to copper would have minimal effect.  I've already treated my entire panel including breakers, bus bar, grounds, incoming utility, and panel mains with TC from PerfectPathTechnologies.  I already mentioned what is in my system besides cyrotreated Virtual Dynamics romex feeding two 20 amp dedicated lines.  A new panel will require four Arc Fault GFI breakers which I'm told degrades the sound quality.