Herewith are a couple of reviews that provide some insight into how the Richard Gray units work....
http://www.soundstagenetwork.com/revequip/richard_grays_power_company.htm
https://www.stereophile.com/powerlineaccessories/255/index.html
It’s interesting that an inductor is in parallel with the AC input and is used to provide energy storage for transient current demands. A "sacrificial" MOV is also used for surge suppression.
Reportedly, Richard Gray is now semi-retired and is a consultant for RGPC.
http://www.soundstagenetwork.com/revequip/richard_grays_power_company.htm
https://www.stereophile.com/powerlineaccessories/255/index.html
It’s interesting that an inductor is in parallel with the AC input and is used to provide energy storage for transient current demands. A "sacrificial" MOV is also used for surge suppression.
Reportedly, Richard Gray is now semi-retired and is a consultant for RGPC.