How to improve power supply?

Ptss, the magnetic fields, the induced magnetic fields produced by the transformer are bad for the sound and extend all around the transformer. Doesn't it make sense to get rid of these stray magnetic fields for once and for all?

Geoff, I understand and agree with the goal of eliminating stray magnetic fields; but I don't understand 'how' to do it.

How should I "Mu metal the transformer"?

Use toroidal transformers - very small magnetic field outside.

All transformers should be wrapped with one or two,layers of mu metal, a highly permeable alloy. Toroidal transformers are no exception. In addition, if feasible, should be decoupled from the chassis by removing the bolt and by placing a layer of cork beneath the transformer, isolating the sensitive circuit boards from the transformers.

Geoff Kait
Machina Dynamica