Hi there. Thanks for the suggestion at using a DC filter/detuning the DC cable. However, I am reluctant to even bother experimenting there since the delta after switching to the power bank was so significant. I think efforts will be best spent trying out better low interference power banks. The power bank I have has two high power outputs and a LED screen, which I suspect doesn’t make it the best candidate for an audiophile implementation. I will look to test out the Xiaomi Eric used in his conception of this configuration. Can others share models of power banks they have used and their preferences
I am working on getting the parts together for the choke cable. I will probably be able to implement the 3.3V battery solution before the cable as it stands.