my general experience is that eliminating noise as close as possible to the source has substantial advantages to trying at later stages. Equally applies to improving your power: heavy work on junction and fuse box (e.g. Akiko Audio), separate spur with quality outlet (e.g. Furutech) and well shielded solid core rather than litz power cords (e.g. Acoustic Revive) have benefits stronger than subsequent power filters or conditioners.
in LPS I use a Zerozone 2020 on Router and Etherregen and a Sean Jacobs Dc3/4 on DAC and clock as well as Kingrex on Acoustic Revivr RR77. The problem with wallwarts is that they kick back grunge into the mains which then has a tendency to show up elsewhere in my experience.