Hi Bacardi, I have the new Precision Reference plugged into the PowerCell 10SE and the Galileo PMC. There are 3 circuits -- silver, gray and black. I can't compare with the previous line but Ted Denney says that they were using the equivalent of the gray with the earlier Precision Reference. Each circuit is has a different sonic "coloring" -- the silver is the coolest and the black is the warmest. They are all very resolving. Hope this helps.