In fact, I'm not sure whether the so called "silver plated cable" really contains silver or not. But the color of the cable is silver anyway.
My E12DIY is filled with BUF634 and MUSES02. A great portable amp I would say.
A3 with the 1st version SPC provides a very impressive soundstage, which is comparable to headphones.
The 2nd version mixed cable sacrifices the soundstage (width is good, but losing the depth), and in return, it has a better bass, especially sub-bass.