Might experiment a bit, on both occasions that I’ve gotten off USB on the Amber 3 I’ve perceived a change, didn’t think it was cable related but who knows. The Silver Dragon USB is the best thing I have in the house at the moment, maybe I’ll try experimenting with something further upscale. I always assumed the USB input, it’s a pretty noticeable bump like I said in the OP.
One can never leave well enough alone right? lol Certainly not in this hobby.