I own some fabulous Foundation Research line conditioners that are passive (draw no current to themselves), dedicated (one per component), bi-directional filtering (great for bi-directional digital noise), and they actually work. Their fixed power cables, plugs, IEC connectors, and internal fuses are all cryo-treated via full immersion.
Wall outlets are Furutech (cryo-treated), my 4 dedicated lines back to the service panel are double-cryo-treated (vapored). At the service panel all 4 dedicated lines are running of the same phase/leg. My ics and scs are cryo-treated (full immersion), as are all components' internal fuses.
When I've exhibited at shows, I used a cryo'ed power cable as an extension cable to an audio-grade cryo'ed power dist. center for the gear to plug into.
All my cabling used to be double-cryo'ed, but last fall I started dealing with Jena Labs, the pioneer of cryo-treating in high-end audio and apparently most other cryo vendors use the inferior vapor treatment methodology. As Jena Labs put it, vapor treatment is roughly the equivalent of eating half-baked cookies verses fully-baked cookies. Based on the experiment I did with some silver ics sitting in my closet for 7 years (and other ics and scs) I completely agree with their analogy. Apparently, that's why my request for 2nd cryo'ing showed improvements over the first.
Lastly, I replaced my separate preamp and amps with a single integrated amp, thus reducing the current draw from the wall and reducing the number of power supplies from having to operate with any remaining potential AC noise. Which then spreads into the vibration mgmt part of the vineyard since power supplies induce significant internally-generated vibrations and the extra chassis' capture much unwanted air-borne vibrations. But that's for another thread.