If power supplies cleaned out all incoming AC then they'd be pretty much standardized by now, which none are. No two make are alike. Most are built to a price point or with the belief by the designer that they are only intended to do one thing and that by going by the book, the problem is solved.
That has never been the case.
All the best,
Nonoise
That has never been the case.
All the best,
Nonoise