Holding true to my 2023 goals, I’ve been continuing to explore and improve my digital sources. I’ve done everything I could within reason to upgrade both a Sonore opticalRendu and and a Berkeley Alpha USB reclocker. In both cases yes there are improvements but I’m not sure how much is to do with my tinkering versus the massive improvement in the power supply, especially with the Berkeley Alpha USB.
I was originally going to remove the built in AC power supply but decided to make it where I can undo or switch between the two for future comparison. Also less work, a bit more elegant. Copper is a better shielding material than aluminum so I layered copper sheets over the aluminum in the important areas. Been fooling around with EMI shielding paper as well. Only $25 for four 2" square pieces. That can cover a lot of processors.
Lastly the Alpha USB reclocker has something that I’ve never seen anywhere before. It’s a graphite choke built over around the processor and the wall you see in the top plate is there to separate the USB in from the rest of the board.